| 3748 | Extensible Authentication Protocol (EAP)B. Aboba, L. Blunk, J. Vollbrecht, J. Carlson, H. Levkowetz, Ed. | Proposed Standard | June 2004 |
| 3972 | Cryptographically Generated Addresses (CGA)T. Aura | Proposed Standard | March 2005 |
| 4086 | Randomness Requirements for SecurityD. Eastlake 3rd, J. Schiller, S. Crocker | Best Current Practice | June 2005 |
| 4303 | IP Encapsulating Security Payload (ESP)S. Kent | Proposed Standard | December 2005 |
| 5191 | Protocol for Carrying Authentication for Network Access (PANA)D. Forsberg, Y. Ohba, Ed., B. Patil, H. Tschofenig, A. Yegin | Proposed Standard | May 2008 |
| 5246 | The Transport Layer Security (TLS) Protocol Version 1.2T. Dierks, E. Rescorla · obsoleted by RFC 8446, RFC 9846 | Proposed Standard | August 2008 |
| 5406 | Guidelines for Specifying the Use of IPsec Version 2S. Bellovin | Best Current Practice | February 2009 |
| 5905 | Network Time Protocol Version 4: Protocol and Algorithms SpecificationD. Mills, J. Martin, Ed., J. Burbank, W. Kasch | Proposed Standard | June 2010 |
| 6078 | Host Identity Protocol (HIP) Immediate Carriage and Conveyance of Upper-Layer Protocol Signaling (HICCUPS)G. Camarillo, J. Melen | Experimental | January 2011 |
| 6347 | Datagram Transport Layer Security Version 1.2E. Rescorla, N. Modadugu · obsoleted by RFC 9147 | Proposed Standard | January 2012 |
| 6574 | Report from the Smart Object WorkshopH. Tschofenig, J. Arkko | Informational | April 2012 |
| 6690 | Constrained RESTful Environments (CoRE) Link FormatZ. Shelby | Proposed Standard | August 2012 |
| 7230 | Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and RoutingR. Fielding, Ed., J. Reschke, Ed. · obsoleted by RFC 9110, RFC 9112 | Proposed Standard | June 2014 |
| 7252 | The Constrained Application Protocol (CoAP)Z. Shelby, K. Hartke, C. Bormann | Proposed Standard | June 2014 |
| 7296 | Internet Key Exchange Protocol Version 2 (IKEv2)C. Kaufman, P. Hoffman, Y. Nir, P. Eronen, T. Kivinen | Internet Standard | October 2014 |
| 7401 | Host Identity Protocol Version 2 (HIPv2)R. Moskowitz, Ed., T. Heer, P. Jokela, T. Henderson | Proposed Standard | April 2015 |
| 7515 | JSON Web Signature (JWS)M. Jones, J. Bradley, N. Sakimura | Proposed Standard | May 2015 |
| 7748 | Elliptic Curves for SecurityA. Langley, M. Hamburg, S. Turner | Informational | January 2016 |
| 7815 | Minimal Internet Key Exchange Version 2 (IKEv2) Initiator ImplementationT. Kivinen | Informational | March 2016 |
| 7841 | RFC Streams, Headers, and BoilerplatesJ. Halpern, Ed., L. Daigle, Ed., O. Kolkman, Ed. | Informational | May 2016 |
| 8032 | Edwards-Curve Digital Signature Algorithm (EdDSA)S. Josefsson, I. Liusvaara | Informational | January 2017 |
| 8152 | CBOR Object Signing and Encryption (COSE)J. Schaad · obsoleted by RFC 9052, RFC 9053 | Proposed Standard | July 2017 |