DES-X Encryption slow / Help needed

[chants]

Originally Posted by Gregory Morse

You can write native code instead of the .Net code. Will be much faster. At least, write the time consuming parts of the code in native. You can use the pre-written libraries available on internet. No need to create your own. Much faster.

In the future if you are going to troll with annoying advice, consider not posting. He clearly stated that decryption functioned in a reasonable time. To throw out generic canned nonsense advice like using native code was clearly not what was asked. Although you've been doing this for a while now so it's not surprising.