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<li data-nav-id=/welcome/ title=Welcome class=dd-item><a href=/welcome/><b><i class="fas fa-home"></i> </b>Welcome</a><ul></ul></li>
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<li data-nav-id=/bcpatterns/ title="BC Patterns" class=dd-item><a href=/bcpatterns/><b><i class="fas fa-clone"></i> </b>BC Patterns</a><ul>
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<li data-nav-id=/bcpatterns/facade-pattern/ title="Facade Pattern" class=dd-item><a href=/bcpatterns/facade-pattern/>Facade Pattern</a></li>
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<li data-nav-id=/bcpatterns/generic-method-pattern/ title="Generic Method Pattern" class=dd-item><a href=/bcpatterns/generic-method-pattern/>Generic Method Pattern</a></li></ul></li>
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<li data-nav-id=/bcbestpractices/ title="BC Dev. Best Practices" class=dd-item><a href=/bcbestpractices/><b><i class="fas fa-medal"></i> </b>BC Dev. Best Practices</a><ul>
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<li data-nav-id=/bcbestpractices/readability/ title=Readability class=dd-item><a href=/bcbestpractices/readability/>Readability</a><ul>
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<li data-nav-id=/bcbestpractices/readability/variables-declarations-order/ title="Variables Declarations Order" class=dd-item><a href=/bcbestpractices/readability/variables-declarations-order/>Variables Declarations Order</a></li></ul></li></ul></li>
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<li data-nav-id=/navpatterns/ title="NAV Patterns Archive" class="dd-item parent"><a href=/navpatterns/><b><i class="fas fa-save"></i> </b>NAV Patterns Archive</a><ul>
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<li data-nav-id=/navpatterns/1-patterns/ title="1. Patterns" class="dd-item parent"><a href=/navpatterns/1-patterns/>1. Patterns</a><ul>
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<li data-nav-id=/navpatterns/1-patterns/activity-log/ title="Activity Logs" class=dd-item><a href=/navpatterns/1-patterns/activity-log/>Activity Logs</a></li>
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<li data-nav-id=/navpatterns/1-patterns/argument-table/ title="Argument Table" class=dd-item><a href=/navpatterns/1-patterns/argument-table/>Argument Table</a></li>
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<li data-nav-id=/navpatterns/1-patterns/blocked-entity/ title="Blocked Entity" class=dd-item><a href=/navpatterns/1-patterns/blocked-entity/>Blocked Entity</a><ul>
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<li data-nav-id=/navpatterns/1-patterns/blocked-entity/data-driven-blocked-entity/ title="Data Driven Blocked Entity" class=dd-item><a href=/navpatterns/1-patterns/blocked-entity/data-driven-blocked-entity/>Data Driven Blocked Entity</a></li></ul></li>
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<li data-nav-id=/navpatterns/1-patterns/cached-web-service-calls/ title="Cached Web Server Calls" class=dd-item><a href=/navpatterns/1-patterns/cached-web-service-calls/>Cached Web Server Calls</a></li>
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<li data-nav-id=/navpatterns/1-patterns/conditional-cascading-update/ title="Conditional Cascading Update" class=dd-item><a href=/navpatterns/1-patterns/conditional-cascading-update/>Conditional Cascading Update</a></li>
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<li data-nav-id=/navpatterns/1-patterns/copy-document/ title="Copy Document" class=dd-item><a href=/navpatterns/1-patterns/copy-document/>Copy Document</a></li>
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<li data-nav-id=/navpatterns/1-patterns/create-data-from-templates/ title="Create Data from Templates" class=dd-item><a href=/navpatterns/1-patterns/create-data-from-templates/>Create Data from Templates</a></li>
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<li data-nav-id=/navpatterns/1-patterns/create-urls-to-nav-clients/ title="Create URLs to NAV Clients" class=dd-item><a href=/navpatterns/1-patterns/create-urls-to-nav-clients/>Create URLs to NAV Clients</a></li>
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<li data-nav-id=/navpatterns/1-patterns/creating-custom-charts/ title="Creating Custom Charts" class=dd-item><a href=/navpatterns/1-patterns/creating-custom-charts/>Creating Custom Charts</a></li>
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<li data-nav-id=/navpatterns/1-patterns/cross-session-events/ title="Cross Session Events" class=dd-item><a href=/navpatterns/1-patterns/cross-session-events/>Cross Session Events</a></li>
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<li data-nav-id=/navpatterns/1-patterns/currently-active-record/ title="Currently Active Record" class=dd-item><a href=/navpatterns/1-patterns/currently-active-record/>Currently Active Record</a></li>
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<li data-nav-id=/navpatterns/1-patterns/data-migration-facade/ title="Data Migration Façade" class=dd-item><a href=/navpatterns/1-patterns/data-migration-facade/>Data Migration Façade</a></li>
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<li data-nav-id=/navpatterns/1-patterns/discovery-event/ title="Discovery Event" class=dd-item><a href=/navpatterns/1-patterns/discovery-event/>Discovery Event</a></li>
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<li data-nav-id=/navpatterns/1-patterns/document/ title=Document class=dd-item><a href=/navpatterns/1-patterns/document/>Document</a></li>
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<li data-nav-id=/navpatterns/1-patterns/easy-update-of-setup-or-supplementary-information/ title="Easy Update Of Setup Or Supplementary Information" class=dd-item><a href=/navpatterns/1-patterns/easy-update-of-setup-or-supplementary-information/>Easy Update Of Setup Or Supplementary Information</a></li>
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<li data-nav-id=/navpatterns/1-patterns/error-message-processing/ title="Error Message Processing" class=dd-item><a href=/navpatterns/1-patterns/error-message-processing/>Error Message Processing</a></li>
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<li data-nav-id=/navpatterns/1-patterns/extending-the-role-center-headlines/ title="Extending the Role Center Headlines" class=dd-item><a href=/navpatterns/1-patterns/extending-the-role-center-headlines/>Extending the Role Center Headlines</a></li>
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<li data-nav-id=/navpatterns/1-patterns/feature-localization-for-data-structures/ title="Feature Localization For Data Structures" class=dd-item><a href=/navpatterns/1-patterns/feature-localization-for-data-structures/>Feature Localization For Data Structures</a></li>
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<li data-nav-id=/navpatterns/1-patterns/hooks/ title=Hooks class=dd-item><a href=/navpatterns/1-patterns/hooks/>Hooks</a></li>
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<li data-nav-id=/navpatterns/1-patterns/implementation-of-surrogate-keys-using-autoincrement-pattern/ title="Surrogate keys using Autoincrement Pattern" class=dd-item><a href=/navpatterns/1-patterns/implementation-of-surrogate-keys-using-autoincrement-pattern/>Surrogate keys using Autoincrement Pattern</a></li>
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<li data-nav-id=/navpatterns/1-patterns/instructions-in-the-ui/ title="Instructions in the UI" class=dd-item><a href=/navpatterns/1-patterns/instructions-in-the-ui/>Instructions in the UI</a></li>
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<li data-nav-id=/navpatterns/1-patterns/integration-of-addresses/ title="Integration of Addresses" class=dd-item><a href=/navpatterns/1-patterns/integration-of-addresses/>Integration of Addresses</a></li>
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<li data-nav-id=/navpatterns/1-patterns/journal-error-processing/ title="Journal Error Processing" class=dd-item><a href=/navpatterns/1-patterns/journal-error-processing/>Journal Error Processing</a></li>
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<li data-nav-id=/navpatterns/1-patterns/journal-template-batch-line/ title="Journal Template Batch Line" class=dd-item><a href=/navpatterns/1-patterns/journal-template-batch-line/>Journal Template Batch Line</a></li>
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<li data-nav-id=/navpatterns/1-patterns/master-data/ title="Master Data" class=dd-item><a href=/navpatterns/1-patterns/master-data/>Master Data</a></li>
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<li data-nav-id=/navpatterns/1-patterns/multi-file-download/ title="Multi-file Download" class=dd-item><a href=/navpatterns/1-patterns/multi-file-download/>Multi-file Download</a></li>
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<li data-nav-id=/navpatterns/1-patterns/multi-page-list/ title="Multi-Page List" class=dd-item><a href=/navpatterns/1-patterns/multi-page-list/>Multi-Page List</a></li>
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<li data-nav-id=/navpatterns/1-patterns/multilanguage-application-data/ title="Multilanguage Application Data" class=dd-item><a href=/navpatterns/1-patterns/multilanguage-application-data/>Multilanguage Application Data</a></li>
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<li data-nav-id=/navpatterns/1-patterns/net-exception-handling-in-cal/ title="NET Exception Handling in CAL" class=dd-item><a href=/navpatterns/1-patterns/net-exception-handling-in-cal/>NET Exception Handling in CAL</a><ul>
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<li data-nav-id=/navpatterns/1-patterns/net-exception-handling-in-cal/tryfunction-net-exception-handling-in-cal/ title="TryFunction NET Exception Handling in CAL" class=dd-item><a href=/navpatterns/1-patterns/net-exception-handling-in-cal/tryfunction-net-exception-handling-in-cal/>TryFunction NET Exception Handling in CAL</a></li></ul></li>
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<li data-nav-id=/navpatterns/1-patterns/no-series/ title="No Series" class=dd-item><a href=/navpatterns/1-patterns/no-series/>No Series</a></li>
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<li data-nav-id=/navpatterns/1-patterns/notifications/ title=Notifications class=dd-item><a href=/navpatterns/1-patterns/notifications/>Notifications</a><ul>
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<li data-nav-id=/navpatterns/1-patterns/notifications/in-context-notifications/ title="In-context Notifications" class=dd-item><a href=/navpatterns/1-patterns/notifications/in-context-notifications/>In-context Notifications</a></li>
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<li data-nav-id=/navpatterns/1-patterns/notifications/notification-lifecycle-management-pattern/ title="Notification Lifecycle Management Pattern" class=dd-item><a href=/navpatterns/1-patterns/notifications/notification-lifecycle-management-pattern/>Notification Lifecycle Management Pattern</a></li></ul></li>
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<li data-nav-id=/navpatterns/1-patterns/observer/ title=Observer class=dd-item><a href=/navpatterns/1-patterns/observer/>Observer</a></li>
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<li data-nav-id=/navpatterns/1-patterns/posting-routine-select-behavior/ title="Posting Routine - Select Behavior" class=dd-item><a href=/navpatterns/1-patterns/posting-routine-select-behavior/>Posting Routine - Select Behavior</a></li>
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<li data-nav-id=/navpatterns/1-patterns/product-name/ title="Product Name" class=dd-item><a href=/navpatterns/1-patterns/product-name/>Product Name</a></li>
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<li data-nav-id=/navpatterns/1-patterns/queries/ title=Queries class=dd-item><a href=/navpatterns/1-patterns/queries/>Queries</a><ul>
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<li data-nav-id=/navpatterns/1-patterns/queries/select-distinct-with-queries/ title="SELECT DISTINCT with Queries" class=dd-item><a href=/navpatterns/1-patterns/queries/select-distinct-with-queries/>SELECT DISTINCT with Queries</a></li>
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<li data-nav-id=/navpatterns/1-patterns/queries/use-queries-to-detect-duplicate-records/ title="Use Queries to Detect Duplicate Records" class=dd-item><a href=/navpatterns/1-patterns/queries/use-queries-to-detect-duplicate-records/>Use Queries to Detect Duplicate Records</a></li>
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<li data-nav-id=/navpatterns/1-patterns/queries/use-queries-to-replace-nested-loops/ title="Use Queries to Replace Nested Loops" class=dd-item><a href=/navpatterns/1-patterns/queries/use-queries-to-replace-nested-loops/>Use Queries to Replace Nested Loops</a></li></ul></li>
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<li data-nav-id=/navpatterns/1-patterns/read-once-initialization-and-validation/ title="Read-once Initialization and Validation" class=dd-item><a href=/navpatterns/1-patterns/read-once-initialization-and-validation/>Read-once Initialization and Validation</a></li>
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<li data-nav-id=/navpatterns/1-patterns/released-entity/ title="Released Entity" class=dd-item><a href=/navpatterns/1-patterns/released-entity/>Released Entity</a></li>
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<li data-nav-id=/navpatterns/1-patterns/report-selection/ title="Report Selection" class=dd-item><a href=/navpatterns/1-patterns/report-selection/>Report Selection</a></li>
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<li data-nav-id=/navpatterns/1-patterns/security/ title=Security class="dd-item parent"><a href=/navpatterns/1-patterns/security/>Security</a><ul>
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<li data-nav-id=/navpatterns/1-patterns/security/1-sensitive-data-encapsulation/ title="Sensitive Data Encapsulation" class=dd-item><a href=/navpatterns/1-patterns/security/1-sensitive-data-encapsulation/>Sensitive Data Encapsulation</a></li>
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<li data-nav-id=/navpatterns/1-patterns/security/2-data-encryption/ title="Data Encryption" class="dd-item active"><a href=/navpatterns/1-patterns/security/2-data-encryption/>Data Encryption</a></li>
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<li data-nav-id=/navpatterns/1-patterns/security/3-single-point-of-access/ title="Single Point of Access" class=dd-item><a href=/navpatterns/1-patterns/security/3-single-point-of-access/>Single Point of Access</a></li>
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<li data-nav-id=/navpatterns/1-patterns/security/4-masked-text/ title="Masked Text" class=dd-item><a href=/navpatterns/1-patterns/security/4-masked-text/>Masked Text</a></li>
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<li data-nav-id=/navpatterns/1-patterns/security/5-ssl-in-nav/ title="SSL in NAV" class=dd-item><a href=/navpatterns/1-patterns/security/5-ssl-in-nav/>SSL in NAV</a></li></ul></li>
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<li data-nav-id=/navpatterns/1-patterns/setup-specificity-fallback/ title="Setup Specificity Fallback" class=dd-item><a href=/navpatterns/1-patterns/setup-specificity-fallback/>Setup Specificity Fallback</a></li>
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<li data-nav-id=/navpatterns/1-patterns/silent-file-upload-and-download/ title="Silent File Upload and Download" class=dd-item><a href=/navpatterns/1-patterns/silent-file-upload-and-download/>Silent File Upload and Download</a></li>
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<li data-nav-id=/navpatterns/1-patterns/singleton/ title=Singleton class=dd-item><a href=/navpatterns/1-patterns/singleton/>Singleton</a><ul>
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<li data-nav-id=/navpatterns/1-patterns/singleton/singleton-codeunit/ title="Singleton Codeunit" class=dd-item><a href=/navpatterns/1-patterns/singleton/singleton-codeunit/>Singleton Codeunit</a></li>
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<li data-nav-id=/navpatterns/1-patterns/singleton/singleton-table/ title="Singleton Table" class=dd-item><a href=/navpatterns/1-patterns/singleton/singleton-table/>Singleton Table</a><ul>
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<li data-nav-id=/navpatterns/1-patterns/singleton/singleton-table/cue-table/ title="Cue Table" class=dd-item><a href=/navpatterns/1-patterns/singleton/singleton-table/cue-table/>Cue Table</a></li>
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<li data-nav-id=/navpatterns/1-patterns/singleton/singleton-table/setup-table/ title="Setup Table" class=dd-item><a href=/navpatterns/1-patterns/singleton/singleton-table/setup-table/>Setup Table</a></li></ul></li></ul></li>
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<li data-nav-id=/navpatterns/1-patterns/standard-journal/ title="Standard Journal" class=dd-item><a href=/navpatterns/1-patterns/standard-journal/>Standard Journal</a></li>
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<li data-nav-id=/navpatterns/1-patterns/temporary-dataset-report/ title="Temporary Dataset Report" class=dd-item><a href=/navpatterns/1-patterns/temporary-dataset-report/>Temporary Dataset Report</a></li>
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<li data-nav-id=/navpatterns/1-patterns/totals-and-discounts-on-subpages-sales-and-purchases/ title="Totals and Discounts on Subpages Sales and Purchases" class=dd-item><a href=/navpatterns/1-patterns/totals-and-discounts-on-subpages-sales-and-purchases/>Totals and Discounts on Subpages Sales and Purchases</a></li>
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<li data-nav-id=/navpatterns/1-patterns/transfer-custom-fields/ title="Transfer Custom Fields" class=dd-item><a href=/navpatterns/1-patterns/transfer-custom-fields/>Transfer Custom Fields</a></li>
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<li data-nav-id=/navpatterns/1-patterns/variant-facade/ title="Variant Facade" class=dd-item><a href=/navpatterns/1-patterns/variant-facade/>Variant Facade</a></li></ul></li>
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<li data-nav-id=/navpatterns/2-anti-patterns/ title="2. Anti-Patterns" class=dd-item><a href=/navpatterns/2-anti-patterns/>2. Anti-Patterns</a><ul>
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<li data-nav-id=/navpatterns/2-anti-patterns/nav-upgrade/ title="Nav Upgrade" class=dd-item><a href=/navpatterns/2-anti-patterns/nav-upgrade/>Nav Upgrade</a></li>
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<li data-nav-id=/navpatterns/2-anti-patterns/reusable-bugs/ title="Reusable Bugs" class=dd-item><a href=/navpatterns/2-anti-patterns/reusable-bugs/>Reusable Bugs</a></li></ul></li>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/ title="3. CAL Coding Guidelines" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/>3. CAL Coding Guidelines</a><ul>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/ title=Design class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/>Design</a><ul>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/by-reference-parameters/ title="By Reference Parameters" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/by-reference-parameters/>By Reference Parameters</a></li>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/class-coupling/ title="Class Coupling" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/class-coupling/>Class Coupling</a></li>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/cyclomatic-complexity/ title="Cyclomatic Complexity" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/cyclomatic-complexity/>Cyclomatic Complexity</a></li>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/encapsulate-local-functionality/ title="Encapsulate Local Functionality" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/encapsulate-local-functionality/>Encapsulate Local Functionality</a></li>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/findset-findfirst-findlast/ title="FINDSET FINDFIRST FINDLAST" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/findset-findfirst-findlast/>FINDSET FINDFIRST FINDLAST</a></li>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/initialized-variables/ title="Initialized Variables" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/initialized-variables/>Initialized Variables</a></li>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/maintainability-index/ title="Maintainability Index" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/maintainability-index/>Maintainability Index</a></li>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/parameter-placeholders/ title="Parameter Placeholders" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/parameter-placeholders/>Parameter Placeholders</a></li>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/static-object-invocation/ title="Static Object Invocation" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/static-object-invocation/>Static Object Invocation</a></li>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/unreachable-code/ title="Unreachable Code" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/unreachable-code/>Unreachable Code</a></li>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/unused-initialized-variables/ title="Unused Initialized Variables" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/unused-initialized-variables/>Unused Initialized Variables</a></li>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/unused-variables/ title="Unused Variables" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/unused-variables/>Unused Variables</a></li>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/variable-capacity-mismatch/ title="Variable Capacity Mismatch" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/variable-capacity-mismatch/>Variable Capacity Mismatch</a></li>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/with-scope-name-collision/ title="WITH Scope Name Collision" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/with-scope-name-collision/>WITH Scope Name Collision</a></li></ul></li>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/internally-used-dot-net-types/ title="Internally used DotNet Types" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/internally-used-dot-net-types/>Internally used DotNet Types</a></li>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/internationalization/ title=Internationalization class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/internationalization/>Internationalization</a><ul>
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<h1>Data Encryption</h1>
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<p><em>By Bogdana Botez at Microsoft Development Center Copenhagen</em></p>
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<p>__</p>
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<p>_<a href=Logo-_2D00_-Encryption.png><img src=Logo-_2D00_-Encryption.png alt=" "></a><br>
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_</p>
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<hr>
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<p><strong>Context</strong>: After applying <a href=/nav/w/designpatterns/275.1-sensitive-data-encapsulation><strong>Sensitive Data Encapsulation</strong></a>, all sensitive data is gathered in a known place in the database. This makes it possible to apply further protection best practices.</p>
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<p><strong>Problem</strong>: If any non-authorized actor manages to get access to a copy of the database, the sensitive data is immediately available in clear-text.</p>
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<p>**<br>
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**</p>
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<p><strong>Forces:</strong></p>
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<ul>
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<li><strong>Accessibility:</strong> anyone who managed to steal a copy of the database can at once read the sensitive information.</li>
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</ul>
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<p><strong>Solution:</strong> Encrypt sensitive data. Dynamics NAV offers a simple mechanism for data encryption, to be used by NAV developers.</p>
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<p>Figure 1 adds one more step (in continuation of the figure in pattern <strong><a href=/nav/w/designpatterns/275.sensitive-data-encapsulation>Sensitive Data Encapsulation</a></strong>), in which the first two panels describe how sensitive data has all been gathered in one known place. This makes the current pattern, <strong>Encryption</strong>, much easier – since now data needs to be encrypted in only one place. The last panel of Figure 1 shows the system after the next step, <strong>Encryption</strong>, has been implemented. This shows the iterative process of applying patterns and making the code better step by step.</p>
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<p><a href=Multi-_2D00_-1-2-3.JPG><img src=Multi-_2D00_-1-2-3.JPG alt=" "></a></p>
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<p><em>Figure 1- <strong>Encryption</strong> becomes easier after first applying <a href=/nav/w/designpatterns/275.1-sensitive-data-encapsulation><strong>Sensitive Data Encapsulation</strong></a>.</em></p>
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<hr>
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<p><strong>Usage</strong>: in Dynamics NAV, codeunit 1266 Encryption Management offers an API for encryption of data. The available functionality is described in Table 1.</p>
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<p>Table 1- Encryption functionality in Dynamics NAV (found in codeunit 1266 Encryption Management)</p>
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<p><strong>Procedure</strong></p>
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<p><strong>Description</strong></p>
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<p><strong>EnableEncryption</strong></p>
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<p>Confirms with the user before enabling encryption in all companies of the current database.</p>
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<p><strong>EnableEncryptionSilently</strong></p>
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<p>Enables encryption without UI interaction (to be used for web services).</p>
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<p><strong>DisableEncryption</strong></p>
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<p>Disables encryption. Has a boolean “Silent” parameter which enables/disables UI interaction.</p>
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<p><strong>Encrypt</strong></p>
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<p>Checks that encryption is possible before encrypting the given text.</p>
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<p><strong>Decrypt</strong></p>
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<p>Checks that encryption is possible before decrypting the given text.</p>
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<p><strong>ExportKey</strong></p>
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<p>If encryption is possible, it shows a confirmation dialog to confirm the export of the encryption key, and proceeds to saving it to a location chosen by the user.</p>
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<p><strong>ImportKey</strong></p>
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<p>Imports the encryption key from a user chosen location.</p>
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<p><strong>ChangeKey</strong></p>
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<p>Changes the encryption key.</p>
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<p><strong>IsEncryptionEnabled</strong></p>
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<p>Returns TRUE is encryption is enabled.</p>
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<p><strong>IsEncryptionPossible</strong></p>
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<p>Check is the correct key is present, which only works if encryption is enabled.</p>
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<p><strong>DeleteEncryptedDataInAllCompanies</strong></p>
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<p>Confirms through UI and if the user agrees, deletes all data stored in the Service Password table for all companies in the current database. At the end, it deletes the encryption key.</p>
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<p><strong>User confirmation of encryption</strong></p>
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<p>Ideally, encryption should be enabled by default.</p>
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<p>However, in some versions of Dynamics NAV, there are places where any user who happens to hit a sensitive field (like a password) is asked if they want to encrypt or not. If user confirmation is needed, then let only the security administrators decide (not any random user).</p>
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<p>To ask the security administrator if they want to enable encryption, plug the code below into the OnValidate trigger of the data field which is to be encrypted. This trigger will then get executed each time there’s a change on the password field. For example, if the user is entering a password, then add a call to this procedure to Password – OnValidate() trigger:</p>
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<p>EncryptionIsNotActivatedQst@1001 : TextConst ‘ENU=Data encryption is not activated. It is recommended that you encrypt data. \Do you want to open the Data Encryption Management window?';</p>
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<p>LOCAL PROCEDURE CheckEncryption@6();</p>
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<p>BEGIN</p>
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<p>IF NOT ENCRYPTIONENABLED THEN</p>
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<p>IF CONFIRM(EncryptionIsNotActivatedQst) THEN</p>
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<p>PAGE.RUN(PAGE::“Data Encryption Management”);</p>
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<p>END;</p>
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<p>The code above will guide the user on encrypting, storing the encryption key and choosing a safe password, as follows. Consider for example that NAV is used by a small business, where Stan is the business owner. Hence, Stan has access to all NAV setup and security decisions. Stan wants to enable a connection between NAV and CRM. In NAV, he opens page CRM Connection Setup and enters the URL, user name and password for CRM (Figure 10). When Stan leaves the password field, if data encryption is not enabled, then he sees the confirmation message in Figure 2.</p>
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<p><a href=Encryption-_2D00_-1.JPG><img src=Encryption-_2D00_-1.JPG alt=" "></a></p>
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<p><em>Figure 2- The administrator is advised to enable encryption.</em></p>
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<p>Now Stan becomes aware that there is no encryption and has the opportunity to enable it. If he clicks on “Yes”, Stan will be taken to the Data Encryption Management page (Figure 3).</p>
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<p><a href=Encryption-_2D00_-2.png><img src=Encryption-_2D00_-2.png alt=" "></a></p>
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<p><em>Figure 3- Data Encryption Management page</em></p>
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<p>Stan can now choose “Enable Encryption” from the ribbon which informs him that an encryption key will be created (Figure 4).</p>
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<p><a href=Encryption-_2D00_-3.png><img src=Encryption-_2D00_-3.png alt=" "></a></p>
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<p><em>Figure 4- The administrator is encouraged to save a copy of the encryption key.</em></p>
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<p>Stan has the option to save the encryption key in a safe location. He invokes the action Enable Encryption and is guided forward (Figure 5).</p>
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<p><a href=Encryption-_2D00_-4.png><img src=Encryption-_2D00_-4.png alt=" "></a></p>
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<p><em>Figure 5- The encryption key needs to be protected by a password.</em></p>
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<p>Stan chooses a password, which in this implementation requires minimum 8 characters with at least one uppercase character, one lowercase character and one digit. If the chosen password is too weak, Stan is given information on the expected complexity (Figure 6).</p>
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<p><a href=Encryption-_2D00_-5.png><img src=Encryption-_2D00_-5.png alt=" "></a></p>
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<p><em>Figure 6- The administrator chooses a strong password.</em></p>
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<p>In the end, Stan chooses a location for the encryption key on disk, in a standard file save dialog. The layout of the file save dialog depends on the display target used (web browser, rich client etc.).</p>
|
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<p><strong>NAV Usages.</strong> Encryption examples can be found in NAV in the following places:</p>
|
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<ul>
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|
<li>Page 1260 Bank Data Conv. Service Setup</li>
|
|
<li>Page 1270 OCR Service Setup</li>
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|
<li>Page 5330 CRM Connection Setup</li>
|
|
<li>Table 1275 Doc. Exch. Service Setup</li>
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|
</ul>
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<p><strong>Benefits:</strong></p>
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|
<ul>
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|
<li><strong>Protection</strong>: even if the database has been compromised, the sensitive data is encrypted hence not immediately accessible. Combined with best user practices like setting strong passwords, encryption can prove to be a very strong protection mechanism.</li>
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</ul>
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<p><strong>Anti-patterns:</strong></p>
|
|
<ul>
|
|
<li><strong>Performance:</strong> Do not encrypt everything, because it will have a performance impact on the system. Only important information should be encrypted.</li>
|
|
<li><strong>System calls and “Do It Yourself” solutions</strong>: Although system calls for encryptions are available in NAV (ENCRYPT, DECRYPT and <action>ENCRYPTIONKEY), unless there is no other way, refrain from using them directly. Use instead he API in codeunit 1266 Encryption Management, which is safer to use, because it protects against common mistakes (like attempting to encrypt an already encrypted string, enabling encryption in only one company which makes data not usable in another on the same tenant etc.). Use the <a href=/nav/w/designpatterns/277.3-single-point-of-acces><strong>Single Point of Access</strong></a> pattern to handle sensitive data which needs to be encrypted.</li>
|
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<li><strong>System-level encryption.</strong> The similar codeunit API 1803 Encrypted Key/Value Management is not intended to be reused by partner NAV developers. Normal NAV users do not have permission to access this resource. This stores sensitive data to be accessed by system NAV functionality.</li>
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</ul>
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<p><strong>References</strong></p>
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|
<p>[1]</p>
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|
<p>“Wikipedia,” [Online]. Available: <a href=https://en.wikipedia.org/wiki/Separation>https://en.wikipedia.org/wiki/Separation</a>_of_concerns.</p>
|
|
<p>[2]</p>
|
|
<p>“GUID Structure,” [Online]. Available: <a href=https://msdn.microsoft.com/en-us/library/aa373931(VS.85).aspx>https://msdn.microsoft.com/en-us/library/aa373931(VS.85).aspx</a>.</p>
|
|
<p>[3]</p>
|
|
<p>“Wikipedia,” [Online]. Available: <a href=https://en.wikipedia.org/wiki/Binary>https://en.wikipedia.org/wiki/Binary</a>_large_object.</p>
|
|
<p>[4]</p>
|
|
<p>waldo, “How Do I: Manage Companies in Microsoft Dynamics NAV 2013 R2”.</p>
|
|
<p>[5]</p>
|
|
<p>Microsoft, “Multitenant Deployment Architecture,” Microsoft, [Online]. Available: <a href="https://msdn.microsoft.com/en-us/library/dn271675(v=nav.90).aspx">https://msdn.microsoft.com/en-us/library/dn271675(v=nav.90).aspx</a>.</p>
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<p>[6]</p>
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|
<p>B. Botez, “Setup Table design pattern,” Microsoft, 2013. [Online]. Available: <a href=https://community.dynamics.com/nav/w/designpatterns/76.setup-table>https://community.dynamics.com/nav/w/designpatterns/76.setup-table</a>. [Accessed 31 07 2016].</p>
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<p>[7]</p>
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<p>“Shotgun Surgery,” [Online]. Available: <a href=https://en.wikipedia.org/wiki/Shotgun>https://en.wikipedia.org/wiki/Shotgun</a>_surgery. [Accessed 31 07 2016].</p>
|
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<p>[8]</p>
|
|
<p>M. Fowler, Refactoring: Improving the design of existing code, Addison Wesley, 1999.</p>
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<p>[9]</p>
|
|
<p>“Masking out,” [Online]. Available: <a href=https://en.wikipedia.org/wiki/Data>https://en.wikipedia.org/wiki/Data</a>_masking#Masking_out. [Accessed 29 7 2016].</p>
|
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<p>[10]</p>
|
|
<p>“Key Vault,” Microsoft, [Online]. Available: <a href=https://azure.microsoft.com/en-us/services/key-vault/>https://azure.microsoft.com/en-us/services/key-vault/</a>.</p>
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|
<p>[11]</p>
|
|
<p>“How to: Configure SSL to Secure the Connection to Microsoft Dynamics NAV Web Client,” Microsoft, [Online]. Available: <a href="https://msdn.microsoft.com/en-us/library/hh167264(v=nav.90).aspx">https://msdn.microsoft.com/en-us/library/hh167264(v=nav.90).aspx</a>. [Accessed 2 8 2016].</p>
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<p>[12]</p>
|
|
<p>“sniffer,” [Online]. Available: <a href=http://compnetworking.about.com/od/networksecurityprivacy/g/bldef>http://compnetworking.about.com/od/networksecurityprivacy/g/bldef</a>_sniffer.htm. [Accessed 02 08 2016].</p>
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