Network Working Group
Request for Comments: 1423
IAB IRTF PSRG, IETF PEM WG
Privacy Enhancement for Internet Electronic Mail:
Part III: Algorithms, Modes, and Identifiers
Status of This Memo
This RFC specifies an IAB standards track protocol for the Internet
community, and requests discussion and suggestions for improvements.
Please refer to the current edition of the "IAB Official Protocol
Standards" for the standardization state and status of this protocol.
Distribution of this memo is unlimited.
This document provides definitions, formats, references, and
citations for cryptographic algorithms, usage modes, and associated
identifiers and parameters used in support of Privacy Enhanced Mail
(PEM) in the Internet community. It is intended to become one member
of the set of related PEM RFCs. This document is organized into four
primary sections, dealing with message encryption algorithms, message
integrity check algorithms, symmetric key management algorithms, and
asymmetric key management algorithms (including both asymmetric
encryption and asymmetric signature algorithms).
Some parts of this material are cited by other documents and it is
anticipated that some of the material herein may be changed, added,
or replaced without affecting the citing documents. Therefore,
algorithm-specific material has been placed into this separate
Use of other algorithms and/or modes will require case-by-case study
to determine applicability and constraints. The use of additional
algorithms may be documented first in Prototype or Experimental RFCs.
As experience is gained, these protocols may be considered for
incorporation into the standard. Additional algorithms and modes
approved for use in PEM in this context will be specified in
successors to this document.
This specification was initially developed by the Internet Research
Task Force's Privacy and Security Research Group (IRTF PSRG) and
subsequently refined based on discussion in the Internet Engineering
Task Force's Privacy Enhanced Mail Working Group (IETF PEM WG). John
Linn contributed significantly to the predecessor of this document
(RFC 1115). I would like to thank the members of the PSRG and PEM
WG, as well as all participants in discussions on the "pem-
email@example.com" mailing list, for their contributions to this document.