Cited in: RFC 1421
9 RFCs mentioned in the text of RFC 1421 (Privacy Enhancement for Internet Electronic Mail: Part I: Message Encryption and Authentication Procedures)
| RFC | Title | Status | Date |
|---|---|---|---|
| 821 | Simple Mail Transfer Protocol | Internet Standard | August 1982 |
| 822 | STANDARD FOR THE FORMAT OF ARPA INTERNET TEXT MESSAGES | Internet Standard | August 1982 |
| 934 | Proposed standard for message encapsulation | Unknown | January 1985 |
| 1113 | Privacy enhancement for Internet electronic mail: Part I - message encipherment and authentication procedures | Historic | August 1989 |
| 1170 | Public key standards and licenses | Informational | January 1991 |
| 1310 | The Internet Standards Process | Informational | March 1992 |
| 1422 | Privacy Enhancement for Internet Electronic Mail: Part II: Certificate-Based Key Management | Historic | February 1993 |
| 1423 | Privacy Enhancement for Internet Electronic Mail: Part III: Algorithms, Modes, and Identifiers | Historic | February 1993 |
| 1424 | Privacy Enhancement for Internet Electronic Mail: Part IV: Key Certification and Related Services | Historic | February 1993 |