| 1305 | Network Time Protocol (Version 3) Specification, Implementation and AnalysisD. Mills · obsoleted by RFC 5905 | Historic | March 1992 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2412 | The OAKLEY Key Determination ProtocolH. Orman | Informational | November 1998 |
| 3261 | SIP: Session Initiation ProtocolJ. Rosenberg, H. Schulzrinne, G. Camarillo, A. Johnston, J. Peterson, R. Sparks, M. Handley, E. Schooler | Proposed Standard | July 2002 |
| 3525 | Gateway Control Protocol Version 1C. Groves, Ed., M. Pantaleo, Ed., T. Anderson, Ed., T. Taylor, Ed. · obsoleted by RFC 5125 | Historic | June 2003 |
| 3711 | The Secure Real-time Transport Protocol (SRTP)M. Baugher, D. McGrew, M. Naslund, E. Carrara, K. Norrman | Proposed Standard | March 2004 |
| 3830 | MIKEY: Multimedia Internet KEYingJ. Arkko, E. Carrara, F. Lindholm, M. Naslund, K. Norrman | Proposed Standard | August 2004 |
| 4082 | Timed Efficient Stream Loss-Tolerant Authentication (TESLA): Multicast Source Authentication Transform IntroductionA. Perrig, D. Song, R. Canetti, J. D. Tygar, B. Briscoe | Informational | June 2005 |
| 4086 | Randomness Requirements for SecurityD. Eastlake 3rd, J. Schiller, S. Crocker | Best Current Practice | June 2005 |
| 4383 | The Use of Timed Efficient Stream Loss-Tolerant Authentication (TESLA) in the Secure Real-time Transport Protocol (SRTP)M. Baugher, E. Carrara | Proposed Standard | February 2006 |
| 4442 | Bootstrapping Timed Efficient Stream Loss-Tolerant Authentication (TESLA)S. Fries, H. Tschofenig | Proposed Standard | March 2006 |
| 4563 | The Key ID Information Type for the General Extension Payload in Multimedia Internet KEYing (MIKEY)E. Carrara, V. Lehtovirta, K. Norrman | Proposed Standard | June 2006 |
| 4566 | SDP: Session Description ProtocolM. Handley, V. Jacobson, C. Perkins · obsoleted by RFC 8866 | Proposed Standard | July 2006 |
| 4567 | Key Management Extensions for Session Description Protocol (SDP) and Real Time Streaming Protocol (RTSP)J. Arkko, F. Lindholm, M. Naslund, K. Norrman, E. Carrara | Proposed Standard | July 2006 |
| 4568 | Session Description Protocol (SDP) Security Descriptions for Media StreamsF. Andreasen, M. Baugher, D. Wing | Proposed Standard | July 2006 |
| 4597 | Conferencing ScenariosR. Even, N. Ismail | Informational | August 2006 |
| 4650 | HMAC-Authenticated Diffie-Hellman for Multimedia Internet KEYing (MIKEY)M. Euchner | Proposed Standard | September 2006 |
| 4738 | MIKEY-RSA-R: An Additional Mode of Key Distribution in Multimedia Internet KEYing (MIKEY)D. Ignjatic, L. Dondeti, F. Audet, P. Lin | Proposed Standard | November 2006 |
| 4771 | Integrity Transform Carrying Roll-Over Counter for the Secure Real-time Transport Protocol (SRTP)V. Lehtovirta, M. Naslund, K. Norrman | Proposed Standard | January 2007 |
| 4909 | Multimedia Internet KEYing (MIKEY) General Extension Payload for Open Mobile Alliance BCAST LTKM/STKM TransportL. Dondeti, Ed., D. Castleford, F. Hartung · obsoleted by RFC 5410, RFC 6309 | Informational | June 2007 |
| 4949 | Internet Security Glossary, Version 2R. Shirey | Informational | August 2007 |
| 5027 | Security Preconditions for Session Description Protocol (SDP) Media StreamsF. Andreasen, D. Wing | Proposed Standard | October 2007 |
| 5125 | Reclassification of RFC 3525 to HistoricT. Taylor | Informational | February 2008 |