It was not possible because FIPS mandates use of certain crypto systems (and to NOT use others), and our application domain—bitcoin private key management—requi

It was not possible because FIPS mandates use of certain crypto systems (and to NOT use others), and our application domain—bitcoin private key management—required the use of non-standard cryptography. According to the lawyers we talked to, we couldn’t meet both needs. In my experience with the government, a waiver is probably possible though. But none of our customers were demanding FIPS certification.