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Top Forums UNIX for Dummies Questions & Answers File encryption/Key encryption ???? Post 102224 by hugow on Thursday 16th of March 2006 10:12:21 AM
Old 03-16-2006
Data File encryption/Key encryption ????

My dilemma,

I need to send, deemed confidential, information via e-mail (SMTP). This information is sitting as a file on AIX. Typically I can send this data as a e-mail attachment via what we term a "mail filter" using telnet. I now would like to somehow encrypt the data and send it to a e-mail address external to the company via the internet to a recipient that is probably using Microsoft Outlook. Obviously I what him to somehow decrypt it to be able to use/view the attachment. I have looked at PKI, but the concept is not totally clear to me, as where is the public and private keys held, what key is exchanged and when, how is this done in the context of sending e-mail using SMTP via telnet (is the key an attachment) how does the recipient know this is a key encrypted file and what key to use, how does this relate to the key in his possession, does he need extra software (example). I was looking at tar, compress, gzip, pax and other standard UNIX commands to achieve a password protected file, but have had no luck thus far. Please can you shed some light on at leased some of my question.

Regards Smilie
 

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mlmmj-send(1)						      General Commands Manual						     mlmmj-send(1)

NAME
mlmmj-send - send mail to a mailinglist or similar SYNOPSIS
mlmmj-send [-L /path/to/list | -l listctrl] -m /path/to/mail [-a] [-D] [-F] [-h] [-r] [-R] [-s] [-T] [-V] -a: Don't archive the mail -D: Don't delete the mail after it's sent -F: What to use as MAIL FROM: -h: This help -l: List control variable. -L: Full path to list directory -m: Full path to mail file -r: Relayhost IP address (defaults to 127.0.0.1) -R: What to use as Reply-To: header -s: Subscribers file name -T: What to use as RCPT TO: -V: Print version DESCRIPTION
This binary is used to send all kinds of mail to mlmmj managed mailinglists, but can potentially be used standalone for sending mails. The only option that is not self explanatory is the -l list control option: '1' means 'send a single mail' This is used together with -F and -T to send one mail to one recipient. '2' means 'mail to moderators' Used for sending mails to the moderators of a list. '3' means 'resend failed list mail' '4' means 'send to file with recipients' '5' means 'bounceprobe' '6' means 'single listmail to single recipient' BUGS
This manual page is very scarce documentation of the mlmmj-send binary. The reason for this is that it's really not supposed to be used by any human, but only supposed to be invoked from other mlmmj binaries. So in case more documentation is needed, please read the source. AUTHORS
This manual page was written by the following persons: Soren Boll Overgaard <boll@debian.org> (based on html2man output) Mads Martin Jorgensen <mmj@mmj.dk> mlmmj-send September 2004 mlmmj-send(1)
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