AS-QuadXXTEA 1.0 - 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.

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)

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.

[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.