how do i stop duplicate characters brute force

[philsmd]

maskprocessor (see https://hashcat.net/wiki/doku.php?id=maskprocessor and http://hashcat.net/tools/maskprocessor/ ) has the -q option.

For slow hashes you can simply pipe it into cudaHashcat without any performance loss. I.e. like this:

Code:

mp -q 2 [your_mask] | cudaHashcat -m ....