| 8550 | Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 4.0 Certificate HandlingJ. Schaad, B. Ramsdell, S. Turner | Proposed Standard | April 2019 |
| 8463 | A New Cryptographic Signature Method for DomainKeys Identified Mail (DKIM)J. Levine | Proposed Standard | September 2018 |
| 8017 | PKCS #1: RSA Cryptography Specifications Version 2.2K. Moriarty, Ed., B. Kaliski, J. Jonsson, A. Rusch | Informational | November 2016 |
| 7935 | The Profile for Algorithms and Key Sizes for Use in the Resource Public Key InfrastructureG. Huston, G. Michaelson, Ed. | Proposed Standard | August 2016 |
| 7815 | Minimal Internet Key Exchange Version 2 (IKEv2) Initiator ImplementationT. Kivinen | Informational | March 2016 |
| 7670 | Generic Raw Public-Key Support for IKEv2T. Kivinen, P. Wouters, H. Tschofenig | Proposed Standard | January 2016 |
| 7518 | JSON Web Algorithms (JWA)M. Jones | Proposed Standard | May 2015 |
| 7517 | JSON Web Key (JWK)M. Jones | Proposed Standard | May 2015 |
| 7516 | JSON Web Encryption (JWE)M. Jones, J. Hildebrand | Proposed Standard | May 2015 |
| 7515 | JSON Web Signature (JWS)M. Jones, J. Bradley, N. Sakimura | Proposed Standard | May 2015 |
| 7486 | HTTP Origin-Bound Authentication (HOBA)S. Farrell, P. Hoffman, M. Thomas | Experimental | March 2015 |
| 7427 | Signature Authentication in the Internet Key Exchange Version 2 (IKEv2)T. Kivinen, J. Snyder | Proposed Standard | January 2015 |
| 7401 | Host Identity Protocol Version 2 (HIPv2)R. Moskowitz, Ed., T. Heer, P. Jokela, T. Henderson | Proposed Standard | April 2015 |
| 7296 | Internet Key Exchange Protocol Version 2 (IKEv2)C. Kaufman, P. Hoffman, Y. Nir, P. Eronen, T. Kivinen | Internet Standard | October 2014 |
| 7182 | Integrity Check Value and Timestamp TLV Definitions for Mobile Ad Hoc Networks (MANETs)U. Herberg, T. Clausen, C. Dearlove | Proposed Standard | April 2014 |
| 6979 | Deterministic Usage of the Digital Signature Algorithm (DSA) and Elliptic Curve Digital Signature Algorithm (ECDSA)T. Pornin | Informational | August 2013 |
| 6968 | FCAST: Object Delivery for the Asynchronous Layered Coding (ALC) and NACK-Oriented Reliable Multicast (NORM) ProtocolsV. Roca, B. Adamson | Experimental | July 2013 |
| 6962 | Certificate TransparencyB. Laurie, A. Langley, E. Kasper · obsoleted by RFC 9162 | Experimental | June 2013 |
| 6940 | REsource LOcation And Discovery (RELOAD) Base ProtocolC. Jennings, B. Lowekamp, Ed., E. Rescorla, S. Baset, H. Schulzrinne | Proposed Standard | January 2014 |
| 6931 | Additional XML Security Uniform Resource Identifiers (URIs)D. Eastlake 3rd · obsoleted by RFC 9231 | Proposed Standard | April 2013 |
| 6726 | FLUTE - File Delivery over Unidirectional TransportT. Paila, R. Walsh, M. Luby, V. Roca, R. Lehtonen | Proposed Standard | November 2012 |
| 6717 | kx509 Kerberized Certificate Issuance Protocol in Use in 2012H. Hotz, R. Allbery | Informational | August 2012 |
| 6622 | Integrity Check Value and Timestamp TLV Definitions for Mobile Ad Hoc Networks (MANETs)U. Herberg, T. Clausen · obsoleted by RFC 7182 | Proposed Standard | May 2012 |
| 6584 | Simple Authentication Schemes for the Asynchronous Layered Coding (ALC) and NACK-Oriented Reliable Multicast (NORM) ProtocolsV. Roca | Proposed Standard | April 2012 |
| 6550 | RPL: IPv6 Routing Protocol for Low-Power and Lossy NetworksT. Winter, Ed., P. Thubert, Ed., A. Brandt, J. Hui, R. Kelsey, P. Levis, K. Pister, R. Struik, JP. Vasseur, R. Alexander | Proposed Standard | March 2012 |
| 6407 | The Group Domain of InterpretationB. Weis, S. Rowles, T. Hardjono · obsoleted by RFC 9838 | Proposed Standard | October 2011 |
| 6376 | DomainKeys Identified Mail (DKIM) SignaturesD. Crocker, Ed., T. Hansen, Ed., M. Kucherawy, Ed. | Internet Standard | September 2011 |
| 6211 | Cryptographic Message Syntax (CMS) Algorithm Identifier Protection AttributeJ. Schaad | Proposed Standard | April 2011 |
| 6187 | X.509v3 Certificates for Secure Shell AuthenticationK. Igoe, D. Stebila | Proposed Standard | March 2011 |
| 6150 | MD4 to Historic StatusS. Turner, L. Chen | Informational | March 2011 |
| 6149 | MD2 to Historic StatusS. Turner, L. Chen | Informational | March 2011 |
| 6120 | Extensible Messaging and Presence Protocol (XMPP): CoreP. Saint-Andre | Proposed Standard | March 2011 |
| 5996 | Internet Key Exchange Protocol Version 2 (IKEv2)C. Kaufman, P. Hoffman, Y. Nir, P. Eronen · obsoleted by RFC 7296 | Proposed Standard | September 2010 |
| 5990 | Use of the RSA-KEM Key Transport Algorithm in the Cryptographic Message Syntax (CMS)J. Randall, B. Kaliski, J. Brainard, S. Turner · obsoleted by RFC 9690 | Proposed Standard | September 2010 |
| 5981 | Authorization for NSIS Signaling Layer ProtocolsJ. Manner, M. Stiemerling, H. Tschofenig, R. Bless, Ed. | Experimental | February 2011 |
| 5958 | Asymmetric Key PackagesS. Turner | Proposed Standard | August 2010 |
| 5915 | Elliptic Curve Private Key StructureS. Turner, D. Brown | Informational | June 2010 |
| 5904 | RADIUS Attributes for IEEE 802.16 Privacy Key Management Version 1 (PKMv1) Protocol SupportG. Zorn | Informational | June 2010 |
| 5849 | The OAuth 1.0 ProtocolE. Hammer-Lahav, Ed. · obsoleted by RFC 6749 | Informational | April 2010 |
| 5776 | Use of Timed Efficient Stream Loss-Tolerant Authentication (TESLA) in the Asynchronous Layered Coding (ALC) and NACK-Oriented Reliable Multicast (NORM) ProtocolsV. Roca, A. Francillon, S. Faurite | Experimental | April 2010 |
| 5754 | Using SHA2 Algorithms with Cryptographic Message SyntaxS. Turner | Proposed Standard | January 2010 |
| 5750 | Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.2 Certificate HandlingB. Ramsdell, S. Turner · obsoleted by RFC 8550 | Proposed Standard | January 2010 |
| 5702 | Use of SHA-2 Algorithms with RSA in DNSKEY and RRSIG Resource Records for DNSSECJ. Jansen | Proposed Standard | October 2009 |
| 5698 | Data Structure for the Security Suitability of Cryptographic Algorithms (DSSC)T. Kunz, S. Okunick, U. Pordesch | Proposed Standard | November 2009 |
| 5510 | Reed-Solomon Forward Error Correction (FEC) SchemesJ. Lacan, V. Roca, J. Peltotalo, S. Peltotalo | Proposed Standard | April 2009 |
| 5456 | IAX: Inter-Asterisk eXchange Version 2M. Spencer, B. Capouch, E. Guy, Ed., F. Miller, K. Shumard | Informational | February 2010 |
| 5327 | Licklider Transmission Protocol - Security ExtensionsS. Farrell, M. Ramadas, S. Burleigh | Experimental | September 2008 |
| 5269 | Distributing a Symmetric Fast Mobile IPv6 (FMIPv6) Handover Key Using SEcure Neighbor Discovery (SEND)J. Kempf, R. Koodli | Proposed Standard | June 2008 |
| 5246 | The Transport Layer Security (TLS) Protocol Version 1.2T. Dierks, E. Rescorla · obsoleted by RFC 8446, RFC 9846 | Proposed Standard | August 2008 |
| 5170 | Low Density Parity Check (LDPC) Staircase and Triangle Forward Error Correction (FEC) SchemesV. Roca, C. Neumann, D. Furodet | Proposed Standard | June 2008 |
| 5126 | CMS Advanced Electronic Signatures (CAdES)D. Pinkas, N. Pope, J. Ross | Informational | March 2008 |
| 5024 | ODETTE File Transfer Protocol 2.0I. Friend | Informational | November 2007 |
| 4880 | OpenPGP Message FormatJ. Callas, L. Donnerhacke, H. Finney, D. Shaw, R. Thayer · obsoleted by RFC 9580 | Proposed Standard | November 2007 |
| 4871 | DomainKeys Identified Mail (DKIM) SignaturesE. Allman, J. Callas, M. Delany, M. Libbey, J. Fenton, M. Thomas · obsoleted by RFC 6376 | Proposed Standard | May 2007 |
| 4866 | Enhanced Route Optimization for Mobile IPv6J. Arkko, C. Vogt, W. Haddad | Proposed Standard | May 2007 |
| 4784 | Verizon Wireless Dynamic Mobile IP Key Update for cdma2000(R) NetworksC. Carroll, F. Quick | Informational | June 2007 |
| 4746 | Extensible Authentication Protocol (EAP) Password Authenticated ExchangeT. Clancy, W. Arbaugh | Informational | November 2006 |
| 4718 | IKEv2 Clarifications and Implementation GuidelinesP. Eronen, P. Hoffman · obsoleted by RFC 5996 | Informational | October 2006 |
| 4556 | Public Key Cryptography for Initial Authentication in Kerberos (PKINIT)L. Zhu, B. Tung | Proposed Standard | June 2006 |
| 4535 | GSAKMP: Group Secure Association Key Management ProtocolH. Harney, U. Meth, A. Colegrove, G. Gross | Proposed Standard | June 2006 |
| 4432 | RSA Key Exchange for the Secure Shell (SSH) Transport Layer ProtocolB. Harris | Proposed Standard | March 2006 |
| 4359 | The Use of RSA/SHA-1 Signatures within Encapsulating Security Payload (ESP) and Authentication Header (AH)B. Weis | Proposed Standard | January 2006 |
| 4346 | The Transport Layer Security (TLS) Protocol Version 1.1T. Dierks, E. Rescorla · obsoleted by RFC 5246 | Historic | April 2006 |
| 4306 | Internet Key Exchange (IKEv2) ProtocolC. Kaufman, Ed. · obsoleted by RFC 5996 | Proposed Standard | December 2005 |
| 4253 | The Secure Shell (SSH) Transport Layer ProtocolT. Ylonen, C. Lonvick, Ed. | Proposed Standard | January 2006 |
| 4211 | Internet X.509 Public Key Infrastructure Certificate Request Message Format (CRMF)J. Schaad | Proposed Standard | September 2005 |
| 4056 | Use of the RSASSA-PSS Signature Algorithm in Cryptographic Message Syntax (CMS)J. Schaad | Proposed Standard | June 2005 |
| 4055 | Additional Algorithms and Identifiers for RSA Cryptography for use in the Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) ProfileJ. Schaad, B. Kaliski, R. Housley | Proposed Standard | June 2005 |
| 4051 | Additional XML Security Uniform Resource Identifiers (URIs)D. Eastlake 3rd · obsoleted by RFC 6931 | Proposed Standard | April 2005 |
| 3972 | Cryptographically Generated Addresses (CGA)T. Aura | Proposed Standard | March 2005 |
| 3871 | Operational Security Requirements for Large Internet Service Provider (ISP) IP Network InfrastructureG. Jones, Ed. | Informational | September 2004 |
| 3560 | Use of the RSAES-OAEP Key Transport Algorithm in Cryptographic Message Syntax (CMS)R. Housley | Proposed Standard | July 2003 |
| 3520 | Session Authorization Policy ElementL-N. Hamer, B. Gage, B. Kosinski, H. Shieh | Proposed Standard | April 2003 |