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As of August 10, 2021, the entropy caveats can be applied to a FIPS 140-2 entropy assessment report submission. The following email sent to the labs provides the full information about the caveats. The SP 800-90B SHALL Statement spreadsheet discusses which requirements are allowed for a caveat.
Dear CST Labs,
In response to feedback from the recent Entropy Source Validation Workshop, as well as specific requests to move the deadline for mandatory compliance to NIST SP 800-90B, the CMVP has decided to allow provisional validation of FIPS 140-2 modules with entropy sources that do not meet all the requirements of NIST SP 800-90B. Instead, they will only need to meet a subset of the requirements in SP 800-90B. We will publish a table of all the requirements (i.e., all SHALL statements) extracted from SP 800-90B and indicate which of these are still required and which are optional.
Conditions on these provisional validations are as follows:
The first draft of the SP 800-90B requirements table will be published next week for feedback and comment.
Please be advised that though we will validate FIPS 140-2 modules with entropy sources that meet these provisional requirements, the CMVP continues to strongly recommend full compliance with SP 800-90B.
The CAVP and CMVP Teams