# Shark

Shark is a sha256+xor based encryption.  
I made it because I want to try to break it.  
(Precisely: Show it does not provide semantic security, because it is not IND-CPA-secure)  
This will work iff I succeed in building a PPT-discriminator for sha256 from randomness  
As my first approach this discriminator will be based on an LSTM-network.