SHA-256
256-bit SHA-2 hash function, the backbone of EDI integrity.
Definition
SHA-256 maps an arbitrary-length input to a 256-bit digest that is deterministic and collision-resistant. In EDI/B2B it produces the AS2 MIC, the CMS messageDigest attribute and the timestamped imprint. It superseded SHA-1 and MD5, now deprecated for signing.
Origin
Specified in FIPS PUB 180-4 (Secure Hash Standard, NIST); also published as ISO/IEC 10118-3 and described in RFC 6234.
Example in context
SHA-256("") = e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855