# crypt(2m)

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## NAME

crypt - Encrypted file mode

## SYNOPSIS

crypt Mode

Y - mode line letter.

## DESCRIPTION

crypt mode enables encrypted files to be loaded and saved for security purposes. The key can be set at any time using the command set-encryption-key(2). Warning, take care if setting this as a global mode, it can have side-effects.

The encryption algorithm is a Beaufort Cipher with a variant key. This is reasonably difficult to decrypt. When you write out text, if `crypt` mode is active and there is no encryption key, MicroEmacs 2009 will ask:

`Encryption String:`

Type in a word or phrase of at least five and up to 128 characters for the encryption to use. If you look at the file which is then written out, all the printable characters have been scrambled. To read such a file later, use find-cfile(3) to load ciphertext files, you will be asked the encryption key before the file is read.

## SEE ALSO

Operating Modes, buffer-mode(2), find-cfile(3), global-mode(2), set-encryption-key(2).

(c) Copyright JASSPA 2009
Last Modified: 2009/08/29
Generated On: 2009/10/12

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