Triple DES

I did not manage to solve this, I was trying to brute force the IV used in the challenge, but seems like $2^{64}$ possibilities of possible IVs is simply too many for my laptop to handle. Peek at the solution and I’m glad I did because there is no shot that I know this. DES, or 3DES also, suffer the problem of weak keys. These are keys that cause the encryption mode of DES to act identically to the decryption mode of DES (albeit potentially that of a different key)....