a.None of the implementatoins are FIPS-certified.
b.Support is provided for the "Suite B" set of crptographic algorithms as specified by the National Security Agency (NSA)
c.Cryptography Next Generatin(CNG) classes are supported on XP and Vista systems.
d.The System.Security.Cryptography.AesManaged class allows custom block size .iteration counts and feedback modes to support any Rijndael based encryption.