StealthMail is a software package intended to allow a small
group of users to correspond privately using Encryption. Realizing
that most users, especially novices, want to use the E-mail program
of their choice, this package is not a "stand-alone" package.
Instead, it only assists the user, together with their own E-mail
program. And it is designed to be easy to use, with a minimum
of options. The package employs the LeapFrog block cipher in CBC
mode using a 64-bit block and 192-bit key. This version also
employs a 64-bit data dependant Salt value.

    The package employs private-key encryption only, however. You
must exchange a "Key" with your desired contacts using a trusted
method. (Courier, public telephone, etc)

    THE PACKAGE IS TO BE SET UP AS FOLLOWS:
1) Install the program files on your hard-drive using the setup
program. (click Start-Run then type in "a:setup" and click OK)

2) After installation, find "StealthMail" in your Start Menu.
(You may add a Desktop Shortcut if you wish)

3) Before proceeding further, you will need to decide on a
"Master" password. It can be one you already use, or a different
one. The longer the better! You do NOT share this with anyone.

4) Run the program. Click on "Master Password" and enter it twice.
The password will NOT be saved anywhere, it will be used to
"secure" your list of contacts. Note: To change a Master Password
already established, enter=> CHANGE PASSWORD and then follow the
directions.

5) Exchange a "Key" with each of your contacts using a trusted
method. The Key should be at least 20 characters but up to 32.
(You need NOT remember these Keys but they should be long and
they should be nonsense, using letters, numbers, and punctuation
marks)

6) Click on "Key Chest" and enter your contacts and the "Keys"
described above. You are now ready to correspond securely with
your computer. If your Key file gets corrupted for any reason,
copy the backup file (KeyFile.BAK) to KeyFile.DAT.

    THE PACKAGE IS TO BE USED AS FOLLOWS:
To send a secure E-mail, start the StealthMail program. Next, Start
your favorite E-mail program and click "Compose." Next, click
"Compose Memo" on the StealthMail toolbar, and enter or paste your
memo. (message) Click "Close." Click "Encrypt to Clipboard."
Now right click on the body of the message you have started using
your E-mail program. Click "paste." It is now encrypted, and you
may send it.

    The recipient will recognize your name, and choose the proper
key from his/her Key Chest. And will Decrypt your message by copying
it to the Clipboard, and decrypting it with StealthMail. This version
of StealthMail should work with most e-mail programs. If you use
Select All, and that does not work, you must copy or cut ONLY the
Encrypted part or you may get nonsense or an error message. Make
sure the Line-Wrap on your e-mail program is set to 64 or greater.

    To send attachments, you will need to encrypt them with
StealthMail first by clicking "Encrypt attachment", following the
directions, and then attach them with your E-mail program. Receiving
attachments is just the reverse. If the contact selected in your
key chest is not the one who sent the attachment, you will get
nonsense in the output file. Just delete or wipe the output file,
and redo it. If you need to store files that you receive, add
a contact named "ME" to the KeyChest, and re-encrypt them using
that name from the KeyChest. WIPE the originals with a separate
utility if you must.

    This version uses compression on messages AND files. But files
that you attach will probably be small graphics files which are
already tightly compressed, and will be skipped.

    While StealthMail employs strong encryption methods, understand
that StealthMail is intended to protect data in transit, not your
hard drive. It is designed for light duty with just a few family
members or friends. Also, since the source code may be available,
it is intended as an "educational starter kit."

    If you need public-key encryption using industry standards,
and a more complete set of options, get PGP international, it's
available online. (it may or may not be as secure as it claims)