RFC 1115 (rfc1115) - Page 1 of 8

Privacy enhancement for Internet electronic mail: Part III - algorithms, modes, and identifiers

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Network Working Group                                            J. Linn
Request for Comments:  1115                                          DEC
                                                  IAB Privacy Task Force
                                                             August 1989


           Privacy Enhancement for Internet Electronic Mail:
             Part III -- Algorithms, Modes, and Identifiers

STATUS OF THIS MEMO

   This RFC suggests a draft standard elective protocol for the Internet
   community, and requests discussion and suggestions for improvement.
   This RFC provides definitions, references, and citations for
   algorithms, usage modes, and associated identifiers used in RFC-1113
   and RFC-1114 in support of privacy-enhanced electronic mail.
   Distribution of this memo is unlimited.

ACKNOWLEDGMENT

   This RFC is the outgrowth of a series of IAB Privacy Task Force
   meetings and of internal working papers distributed for those
   meetings.  I would like to thank the following Privacy Task Force
   members and meeting guests for their comments and contributions at
   the meetings which led to the preparation of this RFC: David
   Balenson, Curt Barker, Jim Bidzos, Matt Bishop, Morrie Gasser, Russ
   Housley, Steve Kent (chairman), Dan Nessett, Mike Padlipsky, Rob
   Shirey, and Steve Wilbur.

Table of Contents

   1.  Executive Summary                                             2
   2.  Symmetric Encryption Algorithms and Modes                     2
   2.1.  DES Modes                                                   2
   2.1.1.  DES in ECB mode (DES-ECB)                                 2
   2.1.2.  DES in EDE mode (DES-EDE)                                 2
   2.1.3.  DES in CBC mode (DES-CBC)                                 3
   3.  Asymmetric Encryption Algorithms and Modes                    3
   3.1.  RSA                                                         3
   4.  Integrity Check Algorithms                                    3
   4.1.  Message Authentication Code (MAC)                           4
   4.2.  RSA-MD2 Message Digest Algorithm                            4
   4.2.1.  Discussion                                                4
   4.2.2.  Reference Implementation                                  5
   NOTES                                                             7






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