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76 lines
2.1 KiB
Markdown
76 lines
2.1 KiB
Markdown
---
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title: 5066(S, F) A cryptographic function operation was attempted. (Windows 10)
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description: Describes security event 5066(S, F) A cryptographic function operation was attempted.
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ms.pagetype: security
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ms.prod: w10
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ms.mktglfcycl: deploy
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ms.sitesec: library
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author: Mir0sh
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---
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# 5066(S, F): A cryptographic function operation was attempted.
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**Applies to**
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- Windows 10
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- Windows Server 2016
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This event generates in [BCryptAddContextFunction](https://msdn.microsoft.com/en-us/library/windows/desktop/aa375360(v=vs.85).aspx)() and [BCryptRemoveContextFunction](https://msdn.microsoft.com/en-us/library/windows/desktop/aa375492(v=vs.85).aspx)() functions. These are Cryptographic Next Generation (CNG) functions.
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This event generates when cryptographic function was added or removed from the list of functions that are supported by an existing CNG context.
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For more information about Cryptographic Next Generation (CNG) visit these pages:
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- <https://msdn.microsoft.com/en-us/library/windows/desktop/aa376214(v=vs.85).aspx>
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- <http://www.microsoft.com/en-us/download/details.aspx?id=1251>
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- <http://www.microsoft.com/en-us/download/details.aspx?id=30688>
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This event is mainly used for Cryptographic Next Generation (CNG) troubleshooting.
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There is no example of this event in this document.
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***Subcategory:*** [Audit Other Policy Change Events](audit-other-policy-change-events.md)
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***Event Schema:***
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*A cryptographic function operation was attempted.*
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*Subject:*
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> *Security ID:%1*
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>
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> *Account Name:%2*
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>
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> *Account Domain:%3*
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>
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> *Logon ID:%4*
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*Configuration Parameters:*
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> *Scope:%5*
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>
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> *Context:%6*
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>
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> *Interface:%7*
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>
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> *Function:%8*
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>
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> *Position:%9*
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*Operation:%10*
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*Return Code:%11*
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***Required Server Roles:*** None.
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***Minimum OS Version:*** Windows Server 2008, Windows Vista.
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***Event Versions:*** 0.
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## Security Monitoring Recommendations
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- Typically this event is required for detailed monitoring of CNG-related cryptographic functions. If you need to monitor or troubleshoot actions related to specific cryptographic functions, review this event to see if it provides the information you need.
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