| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 4492 | Elliptic Curve Cryptography (ECC) Cipher Suites for Transport Layer Security (TLS)S. Blake-Wilson, N. Bolyard, V. Gupta, C. Hawk, B. Moeller · obsoleted by RFC 8422 | Informational | May 2006 |
| 4513 | Lightweight Directory Access Protocol (LDAP): Authentication Methods and Security MechanismsR. Harrison, Ed. | Proposed Standard | June 2006 |
| 5088 | OSPF Protocol Extensions for Path Computation Element (PCE) DiscoveryJL. Le Roux, Ed., JP. Vasseur, Ed., Y. Ikejiri, R. Zhang | Proposed Standard | January 2008 |
| 5089 | IS-IS Protocol Extensions for Path Computation Element (PCE) DiscoveryJL. Le Roux, Ed., JP. Vasseur, Ed., Y. Ikejiri, R. Zhang | Proposed Standard | January 2008 |
| 5246 | The Transport Layer Security (TLS) Protocol Version 1.2T. Dierks, E. Rescorla · obsoleted by RFC 8446, RFC 9846 | 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 |
| 5440 | Path Computation Element (PCE) Communication Protocol (PCEP)JP. Vasseur, Ed., JL. Le Roux, Ed. | Proposed Standard | March 2009 |
| 5925 | The TCP Authentication OptionJ. Touch, A. Mankin, R. Bonica | Proposed Standard | June 2010 |
| 6066 | Transport Layer Security (TLS) Extensions: Extension DefinitionsD. Eastlake 3rd | Proposed Standard | January 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 |
| 6460 | Suite B Profile for Transport Layer Security (TLS)M. Salter, R. Housley | Historic | January 2012 |
| 6614 | Transport Layer Security (TLS) Encryption for RADIUSS. Winter, M. McCauley, S. Venaas, K. Wierenga | Experimental | May 2012 |
| 6698 | The DNS-Based Authentication of Named Entities (DANE) Transport Layer Security (TLS) Protocol: TLSAP. Hoffman, J. Schlyter | Proposed Standard | August 2012 |
| 6952 | Analysis of BGP, LDP, PCEP, and MSDP Issues According to the Keying and Authentication for Routing Protocols (KARP) Design GuideM. Jethanandani, K. Patel, L. Zheng | Informational | May 2013 |
| 7420 | Path Computation Element Communication Protocol (PCEP) Management Information Base (MIB) ModuleA. Koushik, E. Stephan, Q. Zhao, D. King, J. Hardwick | Proposed Standard | December 2014 |
| 7457 | Summarizing Known Attacks on Transport Layer Security (TLS) and Datagram TLS (DTLS)Y. Sheffer, R. Holz, P. Saint-Andre | Informational | February 2015 |
| 7525 | Recommendations for Secure Use of Transport Layer Security (TLS) and Datagram Transport Layer Security (DTLS)Y. Sheffer, R. Holz, P. Saint-Andre · obsoleted by RFC 9325 | Best Current Practice | May 2015 |
| 7671 | The DNS-Based Authentication of Named Entities (DANE) Protocol: Updates and Operational GuidanceV. Dukhovni, W. Hardaker | Proposed Standard | October 2015 |
| 7841 | RFC Streams, Headers, and BoilerplatesJ. Halpern, Ed., L. Daigle, Ed., O. Kolkman, Ed. | Informational | May 2016 |
| 8174 | Ambiguity of Uppercase vs Lowercase in RFC 2119 Key WordsB. Leiba | Best Current Practice | May 2017 |
| 8232 | Optimizations of Label Switched Path State Synchronization Procedures for a Stateful PCEE. Crabbe, I. Minei, J. Medved, R. Varga, X. Zhang, D. Dhody | Proposed Standard | September 2017 |