ChromeOS version: 69.0.3497.120
ChromeOS device model: reks
Case#: 17225421 

Chromebook is asking users to enter 'old passwords' while password was never changed. Issue is widely spread among users. They are using SSO.


At first we thought it maybe crbug.com/867724 but I never saw "dictionary attack" error, so consider it as new bug.

Description:
messages:2018-10-29T17:30:06.396068+00:00 INFO cryptohomed[1200]: TPM error 0x2020 (Key not found in persistent storage): LoadKeyByUuid: failed LoadKeyByUUID
messages:2018-10-29T17:31:56.424586+00:00 INFO cryptohomed[1200]: TPM error 0x2020 (Key not found in persistent storage): LoadKeyByUuid: failed LoadKeyByUUID
messages:2018-10-29T15:09:40.240203-04:00 ERR cryptohomed[1295]: TPM error 0x21 (Decryption error): Error calling Tspi_Data_Unbind


messages:2018-10-18T11:06:36.764686-04:00 ERR cryptohomed[920]: TPM error 0x21 (Decryption error): Error calling Tspi_Data_Unbind
messages:2018-10-18T11:06:36.764759-04:00 ERR cryptohomed[920]: TPM error 0x21 (Decryption error): Retrying will not help.
messages:2018-10-18T11:06:39.390642-04:00 ERR cryptohomed[920]: TPM error 0x21 (Decryption error): Error calling Tspi_Data_Unbind
messages:2018-10-18T11:06:39.390722-04:00 ERR cryptohomed[920]: TPM error 0x21 (Decryption error): Retrying will not help.
Steps to reproduce: 


Drive link to logs: 
https://drive.google.com/open?id=16QKOzgOCjiSgSIa1ZDcRpcV0SkbomF-G
 

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