Path: utzoo!attcan!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!elroy.jpl.nasa.gov!lll-winken!ames!sgi!shinobu!odin!bolyard.wpd.sgi.com!nelson From: nelson@bolyard.wpd.sgi.com (Nelson Bolyard) Newsgroups: comp.sys.mac.apps Subject: SUMMARY: DES file encryption for MAC Keywords: encryption DES Message-ID: <1990Dec18.215820.22668@odin.corp.sgi.com> Date: 18 Dec 90 21:58:20 GMT Sender: news@odin.corp.sgi.com (Net News) Distribution: na Organization: Silicon Graphics, Inc., Mountain View, CA Lines: 53 On Wed Nov 28 13:45:24 PST 1990, in an article entitled: >Subject: Looking for encryption program for MAC I wrote: >I'm looking for a program to run on a MAC that will encrypt and/or >decrypt files. The intent is to encrypt files before transmission through >not-very-secure e-mail facilities, then decrypt upon receipt. > >The encrypted files must be able to be decrypted on IBM PCs as well as >on MACs. That means that the encryption algorithm used by the MAC program >must be well known and documented. I am prepared to write the necesary >program for the IBM PC, but I have no facilities for programming on a MAC. > >Ideally, it would use DES CBC encryption (CBC means Cipher Block Chaining). >A program that does what the **IX (Sun) DES program does would be fine. > >If you have, or know of, a program that meets my needs, please send me >e-mail about it. I don't read this newsgroup regularly. However, >in fairness to you who DO read this group regularly, I promise to be a good >net.citizen and post a summary of any positive relpies to this news group. The replies I got were these: >From: "Bob Fowles 814-865-4774" SUM II by Symantec will encrypt/decrypt Mac files and folders. ----------------------------------------------------------------------------- >From: Chris Ranch Empower from Magna might do what you want. (408)433-5467 ----------------------------------------------------------------------------- >From: scott@huntsai.boeing.com (Scott Hinckley) Stuffit offers encryption (I believe DES though can't quite remember) BONUS: It is shareware, and you can get it via FTP form any of the Mac archives, believe they only want $15-20 sent in for it. ----------------------------------------------------------------------------- I also learned about "Stuffit Deluxe", a commerical version of the shareware "Stuffit" program, and a program called "Sentinel". Unfortunately, NONE of these programs met my criteria, of using an algorithm that is "well known and documented" so that it could be duplicated on a UNIX or PC system. Stuffit Deluxe came the closest. They partially document their "NewDE" algorithm which is a variant of DES. But crucial parts of the algorithm were not specified (e.g. the "KSX" algorithm for producing the key schedule). ----------------------------------------------------------------------------- Nelson Bolyard nelson@sgi.COM {decwrl,sun}!sgi!whizzer!nelson Disclaimer: Views expressed herein do not represent the views of my employer. -----------------------------------------------------------------------------