.TH "XSEND, XGET, ENROLL" 1.SH NAMExsend, xget, enroll \- secret mail.SH SYNOPSIS.B xsendperson.br.B xget.br.B enroll.SH DESCRIPTIONThese commands implement a secure communicationchannel;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..PPTo receive messages, use.IR enroll ;it asks you for a password that you must subsequently quotein order to receive secret mail..PPTo receive secret mail,use.IR xget .It asks for your password, then gives you the messages..PPTo send secret mail, use.IR xsendin 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 sentby ordinary mail..SH FILES/usr/spool/secretmail/*.key: keys/usr/spool/secretmail/*.[0-9]: messages.SH SEE ALSOmail (1).SH BUGSIt should be integrated with ordinary mail.The announcement of secret mail makes traffic analysis possible.