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	Author Info J. Linn 1987, February Privacy enhancement for Internet electronic mail: Part I: Message encipherment and authentication procedures 1988, January Privacy enhancement for Internet electronic mail: Part I: Message encipherment and authentication procedures 1989, August Privacy enhancement for Internet electronic mail: Part I - message encipherment and authentication procedures 1989, August Privacy enhancement for Internet electronic mail: Part II - certificate-based key management 1989, August Privacy enhancement for Internet electronic mail: Part III - algorithms, modes, and identifiers 1993, February Privacy Enhancement for Internet Electronic Mail: Part I: Message Encryption and Authentication Procedures 1993, September Generic Security Service Application Program Interface 1993, September Common Authentication Technology Overview 1996, June The Kerberos Version 5 GSS-API Mechanism 1997, January Generic Security Service Application Program Interface, Version 2 2000, January Generic Security Service Application Program Interface Version 2, Update 1