| 9925 | Unsigned X.509 CertificatesD. Benjamin | Proposed Standard | February 2026 |
| 9525 | Service Identity in TLSP. Saint-Andre, R. Salz | Proposed Standard | November 2023 |
| 8705 | OAuth 2.0 Mutual-TLS Client Authentication and Certificate-Bound Access TokensB. Campbell, J. Bradley, N. Sakimura, T. Lodderstedt | Proposed Standard | February 2020 |
| 8295 | EST (Enrollment over Secure Transport) ExtensionsS. Turner | Proposed Standard | January 2018 |
| 8002 | Host Identity Protocol CertificatesT. Heer, S. Varjonen | Proposed Standard | October 2016 |
| 6487 | A Profile for X.509 PKIX Resource CertificatesG. Huston, G. Michaelson, R. Loomans | Proposed Standard | February 2012 |
| 6253 | Host Identity Protocol CertificatesT. Heer, S. Varjonen · obsoleted by RFC 8002 | Experimental | May 2011 |
| 6216 | Example Call Flows Using Session Initiation Protocol (SIP) Security MechanismsC. Jennings, K. Ono, R. Sparks, B. Hibbard, Ed. | Informational | April 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 |
| 6124 | An EAP Authentication Method Based on the Encrypted Key Exchange (EKE) ProtocolY. Sheffer, G. Zorn, H. Tschofenig, S. Fluhrer | Informational | February 2011 |
| 6031 | Cryptographic Message Syntax (CMS) Symmetric Key Package Content TypeS. Turner, R. Housley | Proposed Standard | December 2010 |
| 6030 | Portable Symmetric Key Container (PSKC)P. Hoyer, M. Pei, S. Machani | Proposed Standard | October 2010 |
| 5981 | Authorization for NSIS Signaling Layer ProtocolsJ. Manner, M. Stiemerling, H. Tschofenig, R. Bless, Ed. | Experimental | February 2011 |
| 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 |
| 5020 | The Lightweight Directory Access Protocol (LDAP) entryDN Operational AttributeK. Zeilenga | Proposed Standard | August 2007 |
| 4876 | A Configuration Profile Schema for Lightweight Directory Access Protocol (LDAP)-Based AgentsB. Neal-Joslin, Ed., L. Howard, M. Ansari | Informational | May 2007 |
| 4535 | GSAKMP: Group Secure Association Key Management ProtocolH. Harney, U. Meth, A. Colegrove, G. Gross | Proposed Standard | June 2006 |
| 4530 | Lightweight Directory Access Protocol (LDAP) entryUUID Operational AttributeK. Zeilenga | Proposed Standard | June 2006 |
| 4520 | Internet Assigned Numbers Authority (IANA) Considerations for the Lightweight Directory Access Protocol (LDAP)K. Zeilenga | Best Current Practice | June 2006 |
| 4517 | Lightweight Directory Access Protocol (LDAP): Syntaxes and Matching RulesS. Legg, Ed. | Proposed Standard | June 2006 |
| 4516 | Lightweight Directory Access Protocol (LDAP): Uniform Resource LocatorM. Smith, Ed., T. Howes | Proposed Standard | June 2006 |
| 4513 | Lightweight Directory Access Protocol (LDAP): Authentication Methods and Security MechanismsR. Harrison, Ed. | Proposed Standard | June 2006 |
| 4512 | Lightweight Directory Access Protocol (LDAP): Directory Information ModelsK. Zeilenga, Ed. | Proposed Standard | June 2006 |
| 4511 | Lightweight Directory Access Protocol (LDAP): The ProtocolJ. Sermersheim, Ed. | Proposed Standard | June 2006 |
| 4510 | Lightweight Directory Access Protocol (LDAP): Technical Specification Road MapK. Zeilenga, Ed. | Proposed Standard | June 2006 |