| 768 | User Datagram ProtocolJ. Postel | Internet Standard | August 1980 |
| 791 | Internet ProtocolJ. Postel | Internet Standard | September 1981 |
| 822 | STANDARD FOR THE FORMAT OF ARPA INTERNET TEXT MESSAGESD. Crocker · obsoleted by RFC 2822 | Internet Standard | August 1982 |
| 854 | Telnet Protocol SpecificationJ. Postel, J.K. Reynolds | Internet Standard | May 1983 |
| 959 | File Transfer ProtocolJ. Postel, J. Reynolds | Internet Standard | October 1985 |
| 1034 | Domain names - concepts and facilitiesP. Mockapetris | Internet Standard | November 1987 |
| 1208 | A Glossary of Networking TermsO.J. Jacobsen, D.C. Lynch | Informational | March 1991 |
| 1319 | The MD2 Message-Digest AlgorithmB. Kaliski · obsoleted by RFC 6149 | Historic | April 1992 |
| 1320 | The MD4 Message-Digest AlgorithmR. Rivest · obsoleted by RFC 6150 | Historic | April 1992 |
| 1321 | The MD5 Message-Digest AlgorithmR. Rivest | Informational | April 1992 |
| 1334 | PPP Authentication ProtocolsB. Lloyd, W. Simpson · obsoleted by RFC 1994 | Proposed Standard | October 1992 |
| 1413 | Identification ProtocolM. St. Johns | Proposed Standard | February 1993 |
| 1421 | Privacy Enhancement for Internet Electronic Mail: Part I: Message Encryption and Authentication ProceduresJ. Linn | Historic | February 1993 |
| 1422 | Privacy Enhancement for Internet Electronic Mail: Part II: Certificate-Based Key ManagementS. Kent | Historic | February 1993 |
| 1457 | Security Label Framework for the InternetR. Housley | Informational | May 1993 |
| 1492 | An Access Control Protocol, Sometimes Called TACACSC. Finseth | Informational | July 1993 |
| 1507 | DASS - Distributed Authentication Security ServiceC. Kaufman | Experimental | September 1993 |
| 1510 | The Kerberos Network Authentication Service (V5)J. Kohl, C. Neuman · obsoleted by RFC 4120, RFC 6649 | Historic | September 1993 |
| 1630 | Universal Resource Identifiers in WWW: A Unifying Syntax for the Expression of Names and Addresses of Objects on the Network as used in the World-Wide WebT. Berners-Lee | Informational | June 1994 |
| 1661 | The Point-to-Point Protocol (PPP)W. Simpson, Ed. | Internet Standard | July 1994 |
| 1731 | IMAP4 Authentication MechanismsJ. Myers | Proposed Standard | December 1994 |
| 1734 | POP3 AUTHentication commandJ. Myers · obsoleted by RFC 5034 | Proposed Standard | December 1994 |
| 1738 | Uniform Resource Locators (URL)T. Berners-Lee, L. Masinter, M. McCahill · obsoleted by RFC 4248, RFC 4266 | Proposed Standard | December 1994 |
| 1750 | Randomness Recommendations for SecurityD. Eastlake 3rd, S. Crocker, J. Schiller · obsoleted by RFC 4086 | Informational | December 1994 |
| 1777 | Lightweight Directory Access ProtocolW. Yeong, T. Howes, S. Kille · obsoleted by RFC 3494 | Historic | March 1995 |
| 1824 | The Exponential Security System TESS: An Identity-Based Cryptographic Protocol for Authenticated Key-Exchange (E.I.S.S.-Report 1995/4)H. Danisch | Informational | August 1995 |
| 1828 | IP Authentication using Keyed MD5P. Metzger, W. Simpson | Historic | August 1995 |
| 1829 | The ESP DES-CBC TransformP. Karn, P. Metzger, W. Simpson | Proposed Standard | August 1995 |
| 1848 | MIME Object Security ServicesS. Crocker, N. Freed, J. Galvin, S. Murphy | Historic | October 1995 |
| 1851 | The ESP Triple DES TransformP. Karn, P. Metzger, W. Simpson | Experimental | September 1995 |
| 1866 | Hypertext Markup Language - 2.0T. Berners-Lee, D. Connolly · obsoleted by RFC 2854 | Historic | November 1995 |
| 1885 | Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6)A. Conta, S. Deering · obsoleted by RFC 2463 | Proposed Standard | December 1995 |
| 1928 | SOCKS Protocol Version 5M. Leech, M. Ganis, Y. Lee, R. Kuris, D. Koblas, L. Jones | Proposed Standard | March 1996 |
| 1939 | Post Office Protocol - Version 3J. Myers, M. Rose | Internet Standard | May 1996 |
| 1958 | Architectural Principles of the InternetB. Carpenter, Ed. | Informational | June 1996 |
| 1994 | PPP Challenge Handshake Authentication Protocol (CHAP)W. Simpson | Draft Standard | August 1996 |
| 2023 | IP Version 6 over PPPD. Haskin, E. Allen · obsoleted by RFC 2472 | Proposed Standard | October 1996 |
| 2026 | The Internet Standards Process -- Revision 3S. Bradner | Best Current Practice | October 1996 |
| 2045 | Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message BodiesN. Freed, N. Borenstein | Draft Standard | November 1996 |
| 2060 | Internet Message Access Protocol - Version 4rev1M. Crispin · obsoleted by RFC 3501 | Proposed Standard | December 1996 |
| 2065 | Domain Name System Security ExtensionsD. Eastlake 3rd, C. Kaufman · obsoleted by RFC 2535 | Proposed Standard | January 1997 |
| 2078 | Generic Security Service Application Program Interface, Version 2J. Linn · obsoleted by RFC 2743 | Proposed Standard | January 1997 |
| 2084 | Considerations for Web Transaction SecurityG. Bossert, S. Cooper, W. Drummond | Informational | January 1997 |
| 2104 | HMAC: Keyed-Hashing for Message AuthenticationH. Krawczyk, M. Bellare, R. Canetti | Informational | February 1997 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2137 | Secure Domain Name System Dynamic UpdateD. Eastlake 3rd · obsoleted by RFC 3007 | Proposed Standard | April 1997 |
| 2138 | Remote Authentication Dial In User Service (RADIUS)C. Rigney, A. Rubens, W. Simpson, S. Willens · obsoleted by RFC 2865 | Proposed Standard | April 1997 |
| 2179 | Network Security For Trade ShowsA. Gwinn | Informational | July 1997 |
| 2195 | IMAP/POP AUTHorize Extension for Simple Challenge/ResponseJ. Klensin, R. Catoe, P. Krumviede | Proposed Standard | September 1997 |
| 2196 | Site Security HandbookB. Fraser | Informational | September 1997 |
| 2202 | Test Cases for HMAC-MD5 and HMAC-SHA-1P. Cheng, R. Glenn | Informational | September 1997 |
| 2222 | Simple Authentication and Security Layer (SASL)J. Myers · obsoleted by RFC 4422, RFC 4752 | Proposed Standard | October 1997 |
| 2223 | Instructions to RFC AuthorsJ. Postel, J. Reynolds · obsoleted by RFC 7322 | Informational | October 1997 |
| 2246 | The TLS Protocol Version 1.0T. Dierks, C. Allen · obsoleted by RFC 4346 | Historic | January 1999 |
| 2284 | PPP Extensible Authentication Protocol (EAP)L. Blunk, J. Vollbrecht · obsoleted by RFC 3748 | Proposed Standard | March 1998 |
| 2315 | PKCS #7: Cryptographic Message Syntax Version 1.5B. Kaliski | Informational | March 1998 |
| 2323 | IETF Identification and Security GuidelinesA. Ramos | Informational | 1 April 1998 |
| 2350 | Expectations for Computer Security Incident ResponseN. Brownlee, E. Guttman | Best Current Practice | June 1998 |
| 2356 | Sun's SKIP Firewall Traversal for Mobile IPG. Montenegro, V. Gupta | Informational | June 1998 |
| 2373 | IP Version 6 Addressing ArchitectureR. Hinden, S. Deering · obsoleted by RFC 3513 | Proposed Standard | July 1998 |
| 2401 | Security Architecture for the Internet ProtocolS. Kent, R. Atkinson · obsoleted by RFC 4301 | Proposed Standard | November 1998 |
| 2403 | The Use of HMAC-MD5-96 within ESP and AHC. Madson, R. Glenn | Proposed Standard | November 1998 |
| 2404 | The Use of HMAC-SHA-1-96 within ESP and AHC. Madson, R. Glenn | Proposed Standard | November 1998 |
| 2405 | The ESP DES-CBC Cipher Algorithm With Explicit IVC. Madson, N. Doraswamy | Proposed Standard | November 1998 |
| 2406 | IP Encapsulating Security Payload (ESP)S. Kent, R. Atkinson · obsoleted by RFC 4303, RFC 4305 | Proposed Standard | November 1998 |
| 2407 | The Internet IP Security Domain of Interpretation for ISAKMPD. Piper · obsoleted by RFC 4306 | Historic | November 1998 |
| 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 |
| 2410 | The NULL Encryption Algorithm and Its Use With IPsecR. Glenn, S. Kent | Proposed Standard | November 1998 |
| 2451 | The ESP CBC-Mode Cipher AlgorithmsR. Pereira, R. Adams | Proposed Standard | November 1998 |
| 2460 | Internet Protocol, Version 6 (IPv6) SpecificationS. Deering, R. Hinden · obsoleted by RFC 8200 | Draft Standard | December 1998 |
| 2504 | Users' Security HandbookE. Guttman, L. Leong, G. Malkin | Informational | February 1999 |
| 2510 | Internet X.509 Public Key Infrastructure Certificate Management ProtocolsC. Adams, S. Farrell · obsoleted by RFC 4210 | Proposed Standard | March 1999 |
| 2527 | Internet X.509 Public Key Infrastructure Certificate Policy and Certification Practices FrameworkS. Chokhani, W. Ford · obsoleted by RFC 3647 | Informational | March 1999 |
| 2536 | DSA KEYs and SIGs in the Domain Name System (DNS)D. Eastlake 3rd | Proposed Standard | March 1999 |
| 2570 | Introduction to Version 3 of the Internet-standard Network Management FrameworkJ. Case, R. Mundy, D. Partain, B. Stewart · obsoleted by RFC 3410 | Informational | April 1999 |
| 2574 | User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)U. Blumenthal, B. Wijnen · obsoleted by RFC 3414 | Draft Standard | April 1999 |
| 2612 | The CAST-256 Encryption AlgorithmC. Adams, J. Gilchrist | Informational | June 1999 |
| 2616 | Hypertext Transfer Protocol -- HTTP/1.1R. Fielding, J. Gettys, J. Mogul, H. Frystyk, L. Masinter, P. Leach, T. Berners-Lee · obsoleted by RFC 7230, RFC 7231, RFC 7232, RFC 7233, RFC 7234, RFC 7235 | Draft Standard | June 1999 |
| 2630 | Cryptographic Message SyntaxR. Housley · obsoleted by RFC 3369, RFC 3370 | Proposed Standard | June 1999 |
| 2633 | S/MIME Version 3 Message SpecificationB. Ramsdell, Ed. · obsoleted by RFC 3851 | Proposed Standard | June 1999 |
| 2634 | Enhanced Security Services for S/MIMEP. Hoffman, Ed. | Proposed Standard | June 1999 |
| 2635 | DON'T SPEW A Set of Guidelines for Mass Unsolicited Mailings and Postings (spam*)S. Hambridge, A. Lunde | Informational | June 1999 |