Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!mcnc!duke!juliet!khera
From: khera@juliet.cs.duke.edu (Vick Khera)
Newsgroups: comp.unix.questions
Subject: Re: Encrypted Mail
Message-ID: <15589@duke.cs.duke.edu>
Date: 14 Sep 89 15:05:18 GMT
References: <20858@adm.BRL.MIL>
Sender: news@duke.cs.duke.edu
Reply-To: khera@cs.duke.edu (Vick Khera)
Organization: Duke University CS Dept.; Durham, NC
Lines: 52

In article <20858@adm.BRL.MIL> marwood@ncs.dnd.ca (Gordon Marwood) writes:
>Does anyone know whether there is a version of mail which does automatic 
>encryption/decryption.  I have seen reference to this, but cannot seem to get
>any detailed information.  I am aware that one can encrypt files and send them,
>but I am looking for something a bit more automatic than that.
> 
>Gordon Marwood

At least on Sun systems we have here, there is a facility to do this. I
believe this only works on local mail. here is most of the man page.

							v.

NAME
     xsend, xget, enroll - send or receive secret mail
DESCRIPTION
     These commands implement  a  secure  communication  channel,
     which  is  like  mail(1),  but  no one can read the messages
     except  the  intended  recipient.   The  method  embodies  a
     public-key cryptosystem using knapsacks.

     To receive messages, use enroll; it asks you for a  password
     that  you must subsequently quote in order to receive secret
     mail.

     To receive secret mail, use xget.  It asks  for  your  pass-
     word, then gives you the messages.

     To send secret mail, use xsend in the  same  manner  as  the
     ordinary  mail command.  Unlike mail, xsend accepts only one
     target.  A message announcing the receipt of secret mail  is
     also sent by ordinary mail.
FILES
     /var/spool/secretmail/*.key     keys
     /var/spool/secretmail/*.[0-9]   messages
BUGS
     The knapsack public-key cryptosystem is known to  be  break-
     able.

     Secret mail should be integrated with ordinary mail.

     The announcement of secret mail makes traffic analysis  pos-
     sible.

Sun Release 4.0   Last change: 9 September 1987                 1



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