What is FIPS 140?
The Federal Information Processing Standard (FIPS) 140 is a US and Canadian Government standard that specifies security requirements for cryptographic modules. FIPS 140 has four levels of assurance: Level 1 is the lowest and Level 4 is the most stringent. Each level builds upon the one below it, so a Level 2 certification means that a product meets the requirements for both Level 1 and Level 2.