AS-QuadXXTEA 1.10 - Command line program for encryption of files.

A command line program for encryption and decryption of files. The program splits a 512-bit key into four parts and uses four 128-bit XXTEA in serial. Each instance of XXTEA runs in 32 rounds, regardless of file size. You can encrypt up to 128 MB of data.

This program has two additional parameters. These are "-DR" (Double Rounds, that doubles the number of rounds) and "-QR" (Quad Rounds, that quadruples the number of rounds).

The program uses a key strengthening algorithm [1], this increases the security.

The program checks the integrity of the information by ensuring that the random information [2] added at encryption is identical after decryption.

The program delivers an ErrorLevel code [3] which indicates success (0) or failure (1).

The speed is measured and the program will display the results for you when it's done.

Speed Reference: Approximately 8 MB/sec. (Intel Core i3-9100) Approximately 4 MB/sec. with double rounds. Approximately 2 MB/sec. with quadruple rounds.

Important information: Save the downloaded program if you have information encrypted with it. I do not guarantee compatibility between different versions/revisions of the program.

https://www.andreas-software.com/international/zip/programs/as_quadxxtea.zip

Revision Date: See file date.
License: Freeware.
Unicode Support: Yes.
Program Type: Fully portable, x64.
Operating System(s): Windows 7 (SP1+), 8.1 and 10. (Also Windows Server 2012 R2 and 2016.)
Language(s): Only English.

[1] The key strengthening algorithm is using SHA3-512 and executes 131,072 times. (KSA.DLL / KSA-X86.DLL)
[2] The random information is fetched from Microsoft Crypto API. (RANDOM.DLL / RANDOM-X86.DLL)
[3] The ErrorLevel code can be useful when calling from batch files or other programs.