A.2.2. 256-Bit Symmetric Key

a4205820403697de87af64611c1d32a05dab0fe1fcb715a86ab435f1ec99192d
795693880104024c53796d6d6574726963323536030a

Figure 6: 256-Bit Symmetric COSE_Key as Hex String

{
  / k /   -1: h'403697de87af64611c1d32a05dab0fe1fcb715a86ab435f1
                ec99192d79569388'
  / kty /  1: 4 / Symmetric /,
  / kid /  4: h'53796d6d6574726963323536' / 'Symmetric256' /,
  / alg /  3: 4 / HMAC 256/64 /
}

Figure 7: 256-Bit Symmetric COSE_Key in CBOR Diagnostic Notation

A.2.2. 256-Bit Symmetric Key​

A.2.2. 256-Bit Symmetric Key