| 3261 | SIP: Session Initiation ProtocolJ. Rosenberg, H. Schulzrinne, G. Camarillo, A. Johnston, J. Peterson, R. Sparks, M. Handley, E. Schooler | Proposed Standard | July 2002 |
| 3365 | Strong Security Requirements for Internet Engineering Task Force Standard ProtocolsJ. Schiller | Best Current Practice | August 2002 |
| 3552 | Guidelines for Writing RFC Text on Security ConsiderationsE. Rescorla, B. Korver | Best Current Practice | July 2003 |
| 3704 | Ingress Filtering for Multihomed NetworksF. Baker, P. Savola | Best Current Practice | March 2004 |
| 4252 | The Secure Shell (SSH) Authentication ProtocolT. Ylonen, C. Lonvick, Ed. | Proposed Standard | January 2006 |
| 4322 | Opportunistic Encryption using the Internet Key Exchange (IKE)M. Richardson, D.H. Redelmeier | Informational | December 2005 |
| 5741 | RFC Streams, Headers, and BoilerplatesL. Daigle, Ed., O. Kolkman, Ed., IAB · obsoleted by RFC 7841 | Informational | December 2009 |
| 6120 | Extensible Messaging and Presence Protocol (XMPP): CoreP. Saint-Andre | Proposed Standard | March 2011 |
| 6585 | Additional HTTP Status CodesM. Nottingham, R. Fielding | Proposed Standard | April 2012 |
| 6817 | Low Extra Delay Background Transport (LEDBAT)S. Shalunov, G. Hazel, J. Iyengar, M. Kuehlewind | Experimental | December 2012 |
| 6962 | Certificate TransparencyB. Laurie, A. Langley, E. Kasper · obsoleted by RFC 9162 | Experimental | June 2013 |
| 6973 | Privacy Considerations for Internet ProtocolsA. Cooper, H. Tschofenig, B. Aboba, J. Peterson, J. Morris, M. Hansen, R. Smith | Informational | July 2013 |
| 7258 | Pervasive Monitoring Is an AttackS. Farrell, H. Tschofenig | Best Current Practice | May 2014 |
| 7435 | Opportunistic Security: Some Protection Most of the TimeV. Dukhovni | Informational | December 2014 |
| 7469 | Public Key Pinning Extension for HTTPC. Evans, C. Palmer, R. Sleevi | Proposed Standard | April 2015 |
| 7624 | Confidentiality in the Face of Pervasive Surveillance: A Threat Model and Problem StatementR. Barnes, B. Schneier, C. Jennings, T. Hardie, B. Trammell, C. Huitema, D. Borkmann | Informational | August 2015 |