The package "ccrypt" is now available with the Cygwin distribution.
Canonical homepage: http://quasar.mathstat.uottawa.ca/~selinger/ccrypt/
Canonical download: http://quasar.mathstat.uottawa.ca/~selinger/ccrypt/download/
DESCRIPTION: ============
ccrypt is a utility for encrypting and decrypting files and streams. It was designed as a replacement for the standard unix crypt utility, which is notorious for using a very weak encryption algorithm. ccrypt is based on the Rijndael cipher, which is the U.S. government's chosen candidate for the Advanced Encryption Standard (AES, see http://www.nist.gov/aes/). This cipher is believed to provide very strong security.
Unlike unix crypt, the algorithm provided by ccrypt is not symmetric, i.e., one must specify whether to encrypt or decrypt. The most common way to invoke ccrypt is via the commands ccencrypt and ccdecrypt. There is also a ccat command for decrypting a file directly to the terminal, thus reducing the likelihood of leaving temporary plaintext files around. In addition, there is a compatibility mode for decrypting legacy unix crypt files. An emacs mode is also supplied for editing encrypted text files.
GETTING STARTED QUICKLY: ========================
1. Install ccrypt -----------------
To update your installation, click on the "Install Cygwin now" link on the http://cygwin.com/ web page. This downloads setup.exe to your system. Once you've downloaded setup.exe, run it and select "Utils" and then click on the appropriate fields until the above announced version number appears if it is not displayed already.
2. Modify your .emacs file --------------------------
Add to your .emacs file in your home directory the following two lines:
(setq load-path (cons "/usr/share/emacs/site-lisp" load-path)) (require 'jka-compr-ccrypt "jka-compr-ccrypt.el")
Then, if you open an encrypted file, emacs will ask for a password. The first time you want to save the buffer, emacs will ask again twice, but for later savings in this session the password will be remembered.
3. Test it ----------
At the command prompt:
cd /tmp echo "here goes some test" > testfile.txt ccencrypt testfile.txt
this gives your a file testfile.txt.cpt. You can now either edit it with emacs, or decrypt it with ccdecrypt again.
FURTHER INFORMATION: ====================
If you have ccrypt-related questions or comments, please check out the man page
http://quasar.mathstat.uottawa.ca/~selinger/ccrypt/ccrypt.html
and the FAQ
http://quasar.mathstat.uottawa.ca/~selinger/ccrypt/faq.html
before contacting the author.
Andreas Seidl -- http://www.fmi.uni-passau.de/~seidl
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