| 9608 | No Revocation Available for X.509 Public Key CertificatesR. Housley, T. Okubo, J. Mandel | Proposed Standard | June 2024 |
| 7299 | Object Identifier Registry for the PKIX Working GroupR. Housley | Informational | July 2014 |
| 6277 | Online Certificate Status Protocol Algorithm AgilityS. Santesson, P. Hallam-Baker · obsoleted by RFC 6960 | Proposed Standard | June 2011 |
| 6125 | Representation and Verification of Domain-Based Application Service Identity within Internet Public Key Infrastructure Using X.509 (PKIX) Certificates in the Context of Transport Layer Security (TLS)P. Saint-Andre, J. Hodges · obsoleted by RFC 9525 | Proposed Standard | March 2011 |
| 5904 | RADIUS Attributes for IEEE 802.16 Privacy Key Management Version 1 (PKMv1) Protocol SupportG. Zorn | Informational | June 2010 |
| 5755 | An Internet Attribute Certificate Profile for AuthorizationS. Farrell, R. Housley, S. Turner | Proposed Standard | January 2010 |
| 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 |
| 4985 | Internet X.509 Public Key Infrastructure Subject Alternative Name for Expression of Service NameS. Santesson | Proposed Standard | August 2007 |
| 4324 | Calendar Access Protocol (CAP)D. Royer, G. Babics, S. Mansour | Experimental | December 2005 |
| 4059 | Internet X.509 Public Key Infrastructure Warranty Certificate ExtensionD. Linsenbardt, S. Pontius, A. Sturgeon | Informational | May 2005 |
| 4043 | Internet X.509 Public Key Infrastructure Permanent IdentifierD. Pinkas, T. Gindin | Proposed Standard | May 2005 |
| 3792 | Survey of IPv4 Addresses in Currently Deployed IETF Security Area Standards Track and Experimental DocumentsP. Nesser, II, A. Bergstrom, Ed. | Informational | June 2004 |
| 3280 | Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) ProfileR. Housley, W. Polk, W. Ford, D. Solo · obsoleted by RFC 5280 | Proposed Standard | May 2002 |
| 3279 | Algorithms and Identifiers for the Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) ProfileL. Bassham, W. Polk, R. Housley | Proposed Standard | May 2002 |
| 3182 | Identity Representation for RSVPS. Yadav, R. Yavatkar, R. Pabbati, P. Ford, T. Moore, S. Herzog, R. Hess | Proposed Standard | October 2001 |
| 3163 | ISO/IEC 9798-3 Authentication SASL MechanismR. Zuccherato, M. Nystrom | Experimental | August 2001 |
| 3161 | Internet X.509 Public Key Infrastructure Time-Stamp Protocol (TSP)C. Adams, P. Cain, D. Pinkas, R. Zuccherato | Proposed Standard | August 2001 |
| 3127 | Authentication, Authorization, and Accounting: Protocol EvaluationD. Mitton, M. St.Johns, S. Barkley, D. Nelson, B. Patil, M. Stevens, B. Wolff | Informational | June 2001 |
| 3126 | Electronic Signature Formats for long term electronic signaturesD. Pinkas, J. Ross, N. Pope · obsoleted by RFC 5126 | Informational | September 2001 |
| 3125 | Electronic Signature PoliciesJ. Ross, D. Pinkas, N. Pope | Experimental | September 2001 |
| 3099 | Request for Comments Summary RFC Numbers 3000-3099S. Ginoza | Informational | November 2001 |
| 3039 | Internet X.509 Public Key Infrastructure Qualified Certificates ProfileS. Santesson, W. Polk, P. Barzin, M. Nystrom · obsoleted by RFC 3739 | Proposed Standard | January 2001 |
| 3029 | Internet X.509 Public Key Infrastructure Data Validation and Certification Server ProtocolsC. Adams, P. Sylvester, M. Zolotarev, R. Zuccherato | Experimental | February 2001 |
| 2951 | TELNET Authentication Using KEA and SKIPJACKR. Housley, T. Horting, P. Yee | Informational | September 2000 |
| 2943 | TELNET Authentication Using DSAR. Housley, T. Horting, P. Yee | Proposed Standard | September 2000 |
| 2875 | Diffie-Hellman Proof-of-Possession AlgorithmsH. Prafullchandra, J. Schaad · obsoleted by RFC 6955 | Proposed Standard | July 2000 |
| 2847 | LIPKEY - A Low Infrastructure Public Key Mechanism Using SPKMM. Eisler | Proposed Standard | June 2000 |
| 2825 | A Tangled Web: Issues of I18N, Domain Names, and the Other Internet protocolsIAB, L. Daigle, Ed. | Informational | May 2000 |
| 2818 | HTTP Over TLSE. Rescorla · obsoleted by RFC 9110 | Informational | May 2000 |
| 2797 | Certificate Management Messages over CMSM. Myers, X. Liu, J. Schaad, J. Weinstein · obsoleted by RFC 5272 | Proposed Standard | April 2000 |
| 2752 | Identity Representation for RSVPS. Yadav, R. Yavatkar, R. Pabbati, P. Ford, T. Moore, S. Herzog · obsoleted by RFC 3182 | Proposed Standard | January 2000 |
| 2632 | S/MIME Version 3 Certificate HandlingB. Ramsdell, Ed. · obsoleted by RFC 3850 | Proposed Standard | June 1999 |
| 2631 | Diffie-Hellman Key Agreement MethodE. Rescorla | Proposed Standard | June 1999 |
| 2630 | Cryptographic Message SyntaxR. Housley · obsoleted by RFC 3369, RFC 3370 | Proposed Standard | June 1999 |
| 2587 | Internet X.509 Public Key Infrastructure LDAPv2 SchemaS. Boeyen, T. Howes, P. Richard · obsoleted by RFC 4523 | Proposed Standard | June 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 |
| 2538 | Storing Certificates in the Domain Name System (DNS)D. Eastlake 3rd, O. Gudmundsson · obsoleted by RFC 4398 | Proposed Standard | March 1999 |
| 2528 | Internet X.509 Public Key Infrastructure Representation of Key Exchange Algorithm (KEA) Keys in Internet X.509 Public Key Infrastructure CertificatesR. Housley, W. Polk | Informational | March 1999 |
| 2246 | The TLS Protocol Version 1.0T. Dierks, C. Allen · obsoleted by RFC 4346 | Historic | January 1999 |