BSD 4_1c_2 development

Work on file usr/man/man1/xsend.1

Synthesized-from: CSRG/cd1/4.1c.2

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+.TH XSEND 1 "18 January 1983"
+.SH NAME
+xsend, xget, enroll \- secret mail
+.SH SYNOPSIS
+.B xsend
+person
+.br
+.B xget
+.br
+.B enroll
+.SH DESCRIPTION
+These commands implement a secure communication
+channel;
+it is like
+.IR mail (1),
+but no one can read the messages except the intended recipient.
+The method embodies a public-key cryptosystem using knapsacks.
+.PP
+To receive messages, use
+.IR enroll ;
+it asks you for a password that you must subsequently quote
+in order to receive secret mail.
+.PP
+To receive secret mail,
+use
+.IR xget .
+It asks for your password, then gives you the messages.
+.PP
+To send secret mail, use
+.IR xsend
+in the same manner as the ordinary mail command.
+(However, it will accept only one target).
+A message announcing the receipt of secret mail is also sent
+by ordinary mail.
+.SH FILES
+/usr/spool/secretmail/*.key: keys
+.br
+/usr/spool/secretmail/*.[0-9]: messages
+.SH SEE ALSO
+mail (1)
+.SH BUGS
+It should be integrated with ordinary mail.
+The announcement of secret mail makes traffic analysis possible.