| 1661 | The Point-to-Point Protocol (PPP)W. Simpson, Ed. | Internet Standard | July 1994 |
| 1700 | Assigned NumbersJ. Reynolds, J. Postel · obsoleted by RFC 3232 | Historic | October 1994 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2246 | The TLS Protocol Version 1.0T. Dierks, C. Allen · obsoleted by RFC 4346 | Historic | January 1999 |
| 2433 | Microsoft PPP CHAP ExtensionsG. Zorn, S. Cobb | Informational | October 1998 |
| 2548 | Microsoft Vendor-specific RADIUS AttributesG. Zorn | Informational | March 1999 |
| 2560 | X.509 Internet Public Key Infrastructure Online Certificate Status Protocol - OCSPM. Myers, R. Ankney, A. Malpani, S. Galperin, C. Adams · obsoleted by RFC 6960 | Proposed Standard | June 1999 |
| 2759 | Microsoft PPP CHAP Extensions, Version 2G. Zorn | Informational | January 2000 |
| 2865 | Remote Authentication Dial In User Service (RADIUS)C. Rigney, S. Willens, A. Rubens, W. Simpson | Draft Standard | June 2000 |
| 3232 | Assigned Numbers: RFC 1700 is Replaced by an On-line DatabaseJ. Reynolds, Ed. | Informational | January 2002 |
| 3588 | Diameter Base ProtocolP. Calhoun, J. Loughney, E. Guttman, G. Zorn, J. Arkko · obsoleted by RFC 6733 | Proposed Standard | September 2003 |
| 3748 | Extensible Authentication Protocol (EAP)B. Aboba, L. Blunk, J. Vollbrecht, J. Carlson, H. Levkowetz, Ed. | Proposed Standard | June 2004 |
| 3766 | Determining Strengths For Public Keys Used For Exchanging Symmetric KeysH. Orman, P. Hoffman | Best Current Practice | April 2004 |
| 4282 | The Network Access IdentifierB. Aboba, M. Beadles, J. Arkko, P. Eronen · obsoleted by RFC 7542 | Proposed Standard | December 2005 |
| 4346 | The Transport Layer Security (TLS) Protocol Version 1.1T. Dierks, E. Rescorla · obsoleted by RFC 5246 | Historic | April 2006 |
| 4366 | Transport Layer Security (TLS) ExtensionsS. Blake-Wilson, M. Nystrom, D. Hopwood, J. Mikkelsen, T. Wright · obsoleted by RFC 5246, RFC 6066 | Proposed Standard | April 2006 |
| 5216 | The EAP-TLS Authentication ProtocolD. Simon, B. Aboba, R. Hurst | Proposed Standard | March 2008 |
| 5226 | Guidelines for Writing an IANA Considerations Section in RFCsT. Narten, H. Alvestrand · obsoleted by RFC 8126 | Best Current Practice | May 2008 |
| 5247 | Extensible Authentication Protocol (EAP) Key Management FrameworkB. Aboba, D. Simon, P. Eronen | Proposed Standard | August 2008 |
| 5280 | Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) ProfileD. Cooper, S. Santesson, S. Farrell, S. Boeyen, R. Housley, W. Polk | Proposed Standard | May 2008 |