How to decrease keybyte about lua-simple-encrypt

[ganlvtech]

This encryption is really simple. It just do simple XOR and shuffling. The encrpytion is extremely inefficienct. The encrpyted file may cost hundreds times space as the original file, because there is a huge shuffle map.

The shuffle map contains the position of each byte and is written in decimal. So the file size may O(nlogn), where n is the size of original file size. Increase key length won't increase encrypted file size. And decrease won't either.

I'm really sorry that this tool are not friendly with bigger file. If you really need a more efficient encrypt method, please try to find some other tools.

Thanks.

[ganlvtech]

You can try to remove the shuffle part. The file size with decrease significantly. It may require some more work. Welcome for sending a PR.