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When using CTR Mode the AES is used to generate a kind of key stream which itself is the XORed to your plaintext. So AES is actually encrypting an incrementing counter. At the moment there is no known attack, that would yield E(N) if you do know E(N-1), where N is the aforementioned counter. So this should be safe. But be aware, as the plaintext is XORed ...


AES-256 has sustained 15 years of cryptanalysis, and it can be stated that no knowledge of some plaintext bytes would help to reveal the other bytes no matter what mode of operation (CBC, CTR, etc.) is used. AES-GCM is an authenticated encryption scheme that allows a key holder to detect any modification that has been done to the ciphertext. If you do not ...

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