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Identifier  Tree Algorithm  Reference 

CCF2  CCF 2 tree algorithm  This document 
Identifier  Hash Algorithm  Reference 

SHA256  SHA256 

Identifier  Signature Algorithm  Reference 

ES256  Deterministic ECDSA (NIST P256) with HMACSHA256 

ED25519  Ed25519 (PureEdDSA with the edwards25519 curve) 
