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Individual or (system) process authorized to access an information system.
SOURCE: FIPS 200
Individual, or (system) process acting on behalf of an individual, authorized to access an information system.
SOURCE: SP 800-53; SP 800-18; CNSSI-4009
An individual or a process (subject) acting on behalf of the individual that accesses a cryptographic module in order to obtain cryptographic services.
SOURCE: FIPS 140-2