ent) Constituting evidence of a completed juridical act. [Archives] 
n., In a Public Key cryptosystem, that part of a key pair that is held by a logical or legal entity in an authentication system, protected by a password, and not made available to anyone else. [Computer and Information Sciences] 
n., In general, the body of written and unwritten rules governing the conduct of a transaction, or the formal steps
undertaken in carrying out a transaction. [Archives] 
a.,
 (of a document) Constituting evidence 