32v 1m xsend

XSEND, XGET, ENROLL(1)UNIX Programmer's ManualXSEND, XGET, ENROLL(1)

NAME

    xsend, xget, enroll - secret mail

SYNOPSIS

    xsend person
    xget
    enroll

DESCRIPTION

    These commands implement a secure communication channel; it
    is like _m_a_i_l(1), but no one can read the messages except the
    intended recipient.  The method embodies a public-key cryp-
    tosystem using knapsacks.

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

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

    To send secret mail, use _x_s_e_n_d 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.

FILES

    /usr/spool/secretmail/*.key: keys
    /usr/spool/secretmail/*.[0-9]: messages

SEE ALSO

    mail (1)

BUGS

    It should be integrated with ordinary mail.  The announce-
    ment of secret mail makes traffic analysis possible.