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linux default iconxor-analyze Publisher's description

xor-analyze provides a program for cryptanalyzing xor "encryption" with variable key length.

xor-analyze provides a program for cryptanalyzing xor "encryption" with variable key length.

Here are some key features of "xor analyze":

??? Could possibly crack bad implementations of one-time pads
??? Check ftp://ftp.habets.pp.se/pub/synscan/ for windows binaries

To find out what length the password is the ciphertext is XOR-ed against itself with different shifts (see XOR_analyze::coincidence() in analyze.cc) and the number of zeroes (equal bytes) are counted. This is called counting coincidences. When the number of zeroes is high the shift value is potentially a multiple of the key length. The one that stands out most is checked with statistics (with a frequency table) to get the key. To check with statistics on all key-lengths in key-length interval (-m and -M) use the -a switch (with -v for one key per keylength)


Type 'make'. Mail me if it doesn't compile and don't forget to tell me what kind of system you have.


$ ./xor-enc secret file.txt file.xor

System Requirements:

No special requirements.
Program Release Status: Minor Update
Program Install Support: Install and Uninstall

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