| 2093 | Group Key Management Protocol (GKMP) SpecificationH. Harney, C. Muckenhirn | Experimental | July 1997 |
| 2094 | Group Key Management Protocol (GKMP) ArchitectureH. Harney, C. Muckenhirn | Experimental | July 1997 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2408 | Internet Security Association and Key Management Protocol (ISAKMP)D. Maughan, M. Schertler, M. Schneider, J. Turner · obsoleted by RFC 4306 | Historic | November 1998 |
| 2409 | The Internet Key Exchange (IKE)D. Harkins, D. Carrel · obsoleted by RFC 4306 | Historic | November 1998 |
| 2412 | The OAKLEY Key Determination ProtocolH. Orman | Informational | November 1998 |
| 2451 | The ESP CBC-Mode Cipher AlgorithmsR. Pereira, R. Adams | Proposed Standard | November 1998 |
| 2522 | Photuris: Session-Key Management ProtocolP. Karn, W. Simpson | Experimental | March 1999 |
| 2627 | Key Management for Multicast: Issues and ArchitecturesD. Wallner, E. Harder, R. Agee | Informational | June 1999 |
| 2974 | Session Announcement ProtocolM. Handley, C. Perkins, E. Whelan | Experimental | October 2000 |
| 3161 | Internet X.509 Public Key Infrastructure Time-Stamp Protocol (TSP)C. Adams, P. Cain, D. Pinkas, R. Zuccherato | Proposed Standard | August 2001 |
| 3261 | SIP: Session Initiation ProtocolJ. Rosenberg, H. Schulzrinne, G. Camarillo, A. Johnston, J. Peterson, R. Sparks, M. Handley, E. Schooler | Proposed Standard | July 2002 |
| 3280 | Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) ProfileR. Housley, W. Polk, W. Ford, D. Solo · obsoleted by RFC 5280 | Proposed Standard | May 2002 |
| 3447 | Public-Key Cryptography Standards (PKCS) #1: RSA Cryptography Specifications Version 2.1J. Jonsson, B. Kaliski · obsoleted by RFC 8017 | Informational | February 2003 |
| 3526 | More Modular Exponential (MODP) Diffie-Hellman groups for Internet Key Exchange (IKE)T. Kivinen, M. Kojo | Proposed Standard | May 2003 |
| 3629 | UTF-8, a transformation format of ISO 10646F. Yergeau | Internet Standard | November 2003 |
| 3740 | The Multicast Group Security ArchitectureT. Hardjono, B. Weis | Informational | March 2004 |
| 4086 | Randomness Requirements for SecurityD. Eastlake 3rd, J. Schiller, S. Crocker | Best Current Practice | June 2005 |
| 4306 | Internet Key Exchange (IKEv2) ProtocolC. Kaufman, Ed. · obsoleted by RFC 5996 | Proposed Standard | December 2005 |
| 4514 | Lightweight Directory Access Protocol (LDAP): String Representation of Distinguished NamesK. Zeilenga, Ed. | Proposed Standard | June 2006 |
| 4523 | Lightweight Directory Access Protocol (LDAP) Schema Definitions for X.509 CertificatesK. Zeilenga | Proposed Standard | June 2006 |
| 4534 | Group Security Policy Token v1A. Colegrove, H. Harney | Proposed Standard | June 2006 |