โ ๏ธPee Kay See Ess 7
Author: @Gary#4657
What should we do?
We've given you an intercepted ciphertext from our enemies. We also have access to their decryption validation oracle. The only other piece of information we know is that they are using something called PKCS#7 padding and the oracle will tell us whether the ciphertext we give them decrypts to a proper padding by AES PKCS#7 standards.
What did we do!
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