# IN603

attack against Content Scrambling System cipher


### execution

```
python main.py
```
+ 17 bits lfsr check
+ 0xffffffffff encryption and decryption test
+ testing attack in 2^16 with 6 output bytes provided against CSS n times (by default 5), with keys randomly generated
+ testing safer attack (same as above but use a 7th byte in case of a collision between 2 keys with 6 output bytes)