| 8489 | Session Traversal Utilities for NAT (STUN)M. Petit-Huguenin, G. Salgueiro, J. Rosenberg, D. Wing, R. Mahy, P. Matthews | Proposed Standard | February 2020 |
| 8265 | Preparation, Enforcement, and Comparison of Internationalized Strings Representing Usernames and PasswordsP. Saint-Andre, A. Melnikov | Proposed Standard | October 2017 |
| 7622 | Extensible Messaging and Presence Protocol (XMPP): Address FormatP. Saint-Andre | Proposed Standard | September 2015 |
| 7613 | Preparation, Enforcement, and Comparison of Internationalized Strings Representing Usernames and PasswordsP. Saint-Andre, A. Melnikov · obsoleted by RFC 8265 | Proposed Standard | August 2015 |
| 6940 | REsource LOcation And Discovery (RELOAD) Base ProtocolC. Jennings, B. Lowekamp, Ed., E. Rescorla, S. Baset, H. Schulzrinne | Proposed Standard | January 2014 |
| 6885 | Stringprep Revision and Problem Statement for the Preparation and Comparison of Internationalized Strings (PRECIS)M. Blanchet, A. Sullivan | Informational | March 2013 |
| 6856 | Post Office Protocol Version 3 (POP3) Support for UTF-8R. Gellens, C. Newman, J. Yao, K. Fujiwara | Proposed Standard | March 2013 |
| 6855 | IMAP Support for UTF-8P. Resnick, Ed., C. Newman, Ed., S. Shen, Ed. · obsoleted by RFC 9755 | Proposed Standard | March 2013 |
| 6678 | Requirements for a Tunnel-Based Extensible Authentication Protocol (EAP) MethodK. Hoeper, S. Hanna, H. Zhou, J. Salowey, Ed. | Informational | July 2012 |
| 6631 | Password Authenticated Connection Establishment with the Internet Key Exchange Protocol version 2 (IKEv2)D. Kuegler, Y. Sheffer | Experimental | June 2012 |
| 6628 | Efficient Augmented Password-Only Authentication and Key Exchange for IKEv2S. Shin, K. Kobara | Experimental | June 2012 |
| 6617 | Secure Pre-Shared Key (PSK) Authentication for the Internet Key Exchange Protocol (IKE)D. Harkins | Experimental | June 2012 |
| 6560 | One-Time Password (OTP) Pre-AuthenticationG. Richards | Proposed Standard | April 2012 |
| 6365 | Terminology Used in Internationalization in the IETFP. Hoffman, J. Klensin | Best Current Practice | September 2011 |
| 6331 | Moving DIGEST-MD5 to HistoricA. Melnikov | Informational | July 2011 |
| 6124 | An EAP Authentication Method Based on the Encrypted Key Exchange (EKE) ProtocolY. Sheffer, G. Zorn, H. Tschofenig, S. Fluhrer | Informational | February 2011 |
| 6120 | Extensible Messaging and Presence Protocol (XMPP): CoreP. Saint-Andre | Proposed Standard | March 2011 |
| 6063 | Dynamic Symmetric Key Provisioning Protocol (DSKPP)A. Doherty, M. Pei, S. Machani, M. Nystrom | Proposed Standard | December 2010 |
| 5931 | Extensible Authentication Protocol (EAP) Authentication Using Only a PasswordD. Harkins, G. Zorn | Informational | August 2010 |
| 5804 | A Protocol for Remotely Managing Sieve ScriptsA. Melnikov, Ed., T. Martin | Proposed Standard | July 2010 |
| 5802 | Salted Challenge Response Authentication Mechanism (SCRAM) SASL and GSS-API MechanismsC. Newman, A. Menon-Sen, A. Melnikov, N. Williams | Proposed Standard | July 2010 |
| 5769 | Test Vectors for Session Traversal Utilities for NAT (STUN)R. Denis-Courmont | Informational | April 2010 |
| 5738 | IMAP Support for UTF-8P. Resnick, C. Newman · obsoleted by RFC 6855 | Experimental | March 2010 |
| 5721 | POP3 Support for UTF-8R. Gellens, C. Newman · obsoleted by RFC 6856 | Experimental | February 2010 |
| 5389 | Session Traversal Utilities for NAT (STUN)J. Rosenberg, R. Mahy, P. Matthews, D. Wing · obsoleted by RFC 8489 | Proposed Standard | October 2008 |
| 5054 | Using the Secure Remote Password (SRP) Protocol for TLS AuthenticationD. Taylor, T. Wu, N. Mavrogiannopoulos, T. Perrin | Informational | November 2007 |
| 5034 | The Post Office Protocol (POP3) Simple Authentication and Security Layer (SASL) Authentication MechanismR. Siemborski, A. Menon-Sen | Proposed Standard | July 2007 |
| 4992 | XML Pipelining with Chunks for the Internet Registry Information ServiceA. Newton | Proposed Standard | August 2007 |
| 4954 | SMTP Service Extension for AuthenticationR. Siemborski, Ed., A. Melnikov, Ed. | Proposed Standard | July 2007 |
| 4643 | Network News Transfer Protocol (NNTP) Extension for AuthenticationJ. Vinocur, K. Murchison | Proposed Standard | October 2006 |
| 4616 | The PLAIN Simple Authentication and Security Layer (SASL) MechanismK. Zeilenga, Ed. | Proposed Standard | August 2006 |
| 4519 | Lightweight Directory Access Protocol (LDAP): Schema for User ApplicationsA. Sciberras, Ed. | Proposed Standard | June 2006 |
| 4513 | Lightweight Directory Access Protocol (LDAP): Authentication Methods and Security MechanismsR. Harrison, Ed. | Proposed Standard | June 2006 |
| 4511 | Lightweight Directory Access Protocol (LDAP): The ProtocolJ. Sermersheim, Ed. | Proposed Standard | June 2006 |
| 4462 | Generic Security Service Application Program Interface (GSS-API) Authentication and Key Exchange for the Secure Shell (SSH) ProtocolJ. Hutzelman, J. Salowey, J. Galbraith, V. Welch | Proposed Standard | May 2006 |
| 4422 | Simple Authentication and Security Layer (SASL)A. Melnikov, Ed., K. Zeilenga, Ed. | Proposed Standard | June 2006 |
| 4314 | IMAP4 Access Control List (ACL) ExtensionA. Melnikov | Proposed Standard | December 2005 |
| 4282 | The Network Access IdentifierB. Aboba, M. Beadles, J. Arkko, P. Eronen · obsoleted by RFC 7542 | Proposed Standard | December 2005 |
| 4279 | Pre-Shared Key Ciphersuites for Transport Layer Security (TLS)P. Eronen, Ed., H. Tschofenig, Ed. | Proposed Standard | December 2005 |
| 4256 | Generic Message Exchange Authentication for the Secure Shell Protocol (SSH)F. Cusack, M. Forssen | Proposed Standard | January 2006 |
| 4252 | The Secure Shell (SSH) Authentication ProtocolT. Ylonen, C. Lonvick, Ed. | Proposed Standard | January 2006 |