Parallels vTPM lockout?

Discussion in 'Windows Virtual Machine' started by AlanC16, Sep 24, 2020.

  1. AlanC16

    AlanC16 Bit poster

    Hello, I am working on a BitLocker design and have a question about the Parallels vTPM chip. I have no issues setting up BitLocker encryption using the vTPM, but I can't seem to get the vTPM to lockout with bad PIN attempts. I'm pretty new to TPM so forgive me if I have missed something.

    According to the help section of the Windows group policy settings for TPM, the lockout settings are per manufacturer.
    The number of authorization failures a TPM allows and how long it stays locked out vary by TPM manufacturer. Some TPMs may enter lockout mode for successively longer periods of time with fewer authorization failures depending on past failures. Some TPMs may require a system restart to exit the lockout mode. Other TPMs may require the system to be on so enough clock cycles elapse before the TPM exits the lockout mode.

    Can anyone confirm what this is for the Parallels vTPM? I have attempted over 50 bad PINs with no lockout occurring. Is it possible that there no lockout threshold?

Share This Page