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TPM_E_PCP_AUTHENTICATION_FAILED
TPM_E_PCP_AUTHENTICATION_FAILED means authorization to use a Platform Crypto Provider object failed. The key or policy exists, but the supplied or resolved authorization was not accepted.
What to check
- Verify which key or provider object was opened and which user, service, or security context attempted to use it.
- Check key usage policy and authorization requirements before attempting another credential or PIN.
- Avoid repeated blind retries: TPM anti-hammering controls can turn an ordinary authorization problem into a temporary lockout.
Microsoft: CNG key storage providers
Microsoft: TPM and PCP error codes
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