Hi guys.
In this final video we learn how to break repeated XOR encryption using statistical methods the attached
python script describes the creeped analysis process step by step.
Take a look at the
first will run the script in order to get the most probable key size
for this to our best.
We need an encrypted file that originally contained a lot of English text.
I read me file is perfect
the most probable key size is 16.
Based on the lowest score obtained from the algorithm.
Notice here
now let this creep run through to the end on the same input file it will break that the group shown
shunning 216 single XOR descriptions which are easily solved one by one notice that key finally lets
verify that the key is exactly the same as the one we obtained before.
Here
thank you for watching And don't forget to practice this on your own.