XSEND, XGET, ENROLL(1) General Commands Manual XSEND, 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 mail(1), but no one can read the messages except the intended recipi-
ent. 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 password, then gives you the messages.
To send secret mail, use 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.
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 announcement of secret mail makes traffic analysis possible.
XSEND, XGET, ENROLL(1)
Check Out this Related Man Page
MAIL(1) General Commands Manual MAIL(1)NAME
mail - send or receive mail among users
SYNOPSIS
mail person ...
mail [ -r ] [ -q ] [ -p ] [ -f file ]
DESCRIPTION
Mail with no argument prints a user's mail, message-by-message, in last-in, first-out order; the optional argument -r causes first-in,
first-out order. If the -p flag is given, the mail is printed with no questions asked; otherwise, for each message, mail reads a line from
the standard input to direct disposition of the message.
newline
Go on to next message.
d Delete message and go on to the next.
p Print message again.
- Go back to previous message.
s [ file ] ...
Save the message in the named files (`mbox' default).
w [ file ] ...
Save the message, without a header, in the named files (`mbox' default).
m [ person ] ...
Mail the message to the named persons (yourself is default).
EOT (control-D)
Put unexamined mail back in the mailbox and stop.
q Same as EOT.
x Exit, without changing the mailbox file.
!command
Escape to the Shell to do command.
? Print a command summary.
An interrupt stops the printing of the current letter. The optional argument -q causes mail to exit after interrupts without changing the
mailbox.
When persons are named, mail takes the standard input up to an end-of-file (or a line with just `.') and adds it to each person's `mail'
file. The message is preceded by the sender's name and a postmark. Lines that look like postmarks are prepended with `>'. A person is
usually a user name recognized by login(1). To denote a recipient on a remote system, prefix person by the system name and exclamation
mark (see uucp(1)).
The -f option causes the named file, e.g. `mbox', to be printed as if it were the mail file.
Each user owns his own mailbox, which is by default generally readable but not writable. The command does not delete an empty mailbox nor
change its mode, so a user may make it unreadable if desired.
When a user logs in he is informed of the presence of mail.
FILES
/usr/spool/mail/* mailboxes
/etc/passwd to identify sender and locate persons
mbox saved mail
/tmp/ma* temp file
dead.letter unmailable text
uux(1)SEE ALSO xsend(1), write(1), uucp(1)BUGS
There is a locking mechanism intended to prevent two senders from accessing the same mailbox, but it is not perfect and races are possible.
MAIL(1)
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