Proxmark3 community

henc

Contributor

Registered: 2017-05-13

Posts: 11

Request: XOR analysis tool

Hi Guys,

Does anyone have a good site/tool for analyzing potential XORs by entering the 1 byte output and having a generated list of potential 1 byte inputs that XOR to equal that output? I've been fooling around with just entering multiple 1 byte inputs into https://onlinehextools.com/xor-hex-numbers and looking at the output but if possible I'd like to have the reverse, enter an output and see the various 2 inputs, 3 inputs etc that could generate that output.

This is for fooling around with potential card algorithms derived from UIDs, as an example if I have:

Input (8 byte UID) E0 04 01 00 A4 66 76 B4 = Output 80 A9
Input (8 byte UID) E0 04 01 00 A4 66 4A ED = Output 80 DD
Input (8 byte UID) E0 04 01 00 A4 66 64 91 = Output 80 28

I'm just looking to learn better ways to analyze things like this and discover how the A9 or DD etc. could be generated from the 8 bytes of the UID.

Thanks!

iceman

Administrator

Registered: 2013-04-25

Posts: 9,538

Website

Re: Request: XOR analysis tool

in iceman fork / RRG Repo you find stuff like that in the client  under  "analyze" command.