# How to prove that the given encryption scheme have ciphertext indistinguishability for all PPT adversaries?

I am not sure how to prove that the given two scheme is perfectly indistinguishable for all PPT adversaries!

• Welcome to Cryptography. The usual way is assuming that they are not, then show that Enc cannot have Ind. – kelalaka Mar 18 at 19:49
• Ok so if i assume they are not PPT then what should be my next step? – Student forlife Mar 18 at 20:10