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ccrypt is a command line 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). This cipher is believed to provide very strong security. A compatibility mode is included for decrypting legacy "unix crypt" files.

System Requirements

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2003-03-30 11:37
1.4

This version now handles files larger than 2GB. A new option --tmpfiles was added which causes ccrypt to use temporary files during encryption, rather than overwriting the old file contents destructively. This is less secure than the default behavior, but it prevents data loss in case of an interruption or a crash during crypting.
標籤: Minor feature enhancements

2002-09-27 05:24
1.3

With this release, ccrypt is up to 50% faster during normal operation Encryption and decryption functions have been separated out into a library ccryptlib which can be used by other GPL-compliant programs. Encryption/decryption of write-protected files is now possible. Some commandline options were added for dealing with key changes and filename suffixes. Pseudorandom number generation was improved. Some minor bugs were fixed and autoconfiguration was improved.
標籤: Minor feature enhancements

2002-01-30 11:26
1.2

The encryption/decryption speed was vastly improved by the optimization of a critical inner loop. Minor improvements were made to the autoconf scripts.
標籤: Minor feature enhancements

2001-11-28 18:00
1.1

A --unixcrypt option has been added, which allows the decryption of files that
have been encrypted with the old Unix "crypt" utility. Configuration was made
easier and more portable by using the automake/autoconf system. This release of
ccrypt compiles correctly under Linux, SunOS, MacOS X, FreeBSD, AIX, and
CygWin.
標籤: Minor feature enhancements

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