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A party that either (1) receives a public key; or (2) obtains assurance from an assurance provider (e.g., assurance of the validity of a candidate public key or assurance of possession of the private key corresponding to a public key); or (3) receives key confirmation from a key-confirmation provider.
NIST SP 800-56B Rev. 2 under Recipient
natural or legal person, public authority, agency or any other body to whom data are disclosed
NISTIR 8053 from ISO/TS 25237:2008