New builds a new MAC using a 256-bit/32 byte encryption key, a numeric epoch and numeric pseudo-random salt.

Signature signature is used in the message encryption to validate signature of the message signature is added to the destination slice.

SignatureToUint32 returns uint32 for signature.

EpochSize length of epoch.

MessageOffset offset for the message without overhead.

MAC has the ability to encrypt and decrypt (short) messages as long as they share the same key and the same epoch.