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  1. Windows Registry Editor Version 5.00
  2.  
  3. Hardening Kerberos.
  4.  
  5. HMAC-SHA-1 used as MAC is nowhere close to being broken (neither is HMAC-MD5). SHA-1 is only broken if you need collision resistance, such as the digital signatures used with certificates. RC4 is not recommended.
  6.  
  7. #Enable secure protocols only: AES128_HMAC_SHA1, AES256_HMAC_SHA1
  8. #[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters]
  9. #"SupportedEncryptionTypes"=dword:00000018
  10.  
  11. Enable AES128_HMAC_SHA1, and AES256_HMAC_SHA1, and Future encryption types
  12. [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters]
  13. "SupportedEncryptionTypes"=dword:7ffffff8
  14.  
  15. #Enable RC4_HMAC_MD5 (not recommended) AES128_HMAC_SHA1, and AES256_HMAC_SHA1, and Future encryption types
  16. #[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters]
  17. #"SupportedEncryptionTypes"=dword:7ffffffc
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