What does HRESULT 0x80090329 (SEC_E_ENCRYPT_FAILURE) mean?

 
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SEC_E_CERT_EXPIRED SEC_E_ALGORITHM_MISMATCH

SEC_E_ENCRYPT_FAILURE

SEC_E_ENCRYPT_FAILURE signals this condition: The security package could not encrypt the requested data. The authenticated context or its cryptographic provider could not perform encryption. This can arise from invalid context state, incompatible algorithms, key access issues, or a package-specific provider failure.

What to check

  • Identify the active security package and the operation that requested encryption.
  • Check for earlier certificate, key, provider, or context-negotiation errors.
  • Keep the negotiated protection requirements intact while investigating; lowering encryption requirements can hide a configuration defect.

Microsoft: InitializeSecurityContext

Microsoft: SSPI status codes


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