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If there's a difference visible, that's a weakness in the encryption algorithm. Encrypted data should be statistically indistinct from random noise. It's an i
by monocasa 3mo ago
If there's a difference visible, that's a weakness in the encryption algorithm.
Encrypted data should be statistically indistinct from random noise.
It's an information theory thing. Everything in the ciphertext should be sitting at maximum entropy.
- monster_truck 3mo agoTry it for yourself brother, there is a plainly obvious difference between the random noise of writing garbage compared to a properly encrypted binary. There are even statistically measurable differences in the garbage written across versions of a tool or OS, which, unlike the invented scenario above, has been successfully used to place a time window on when exactly someone destroyed evidence.
- monocasa 3mo agoI'm a security researcher. "Garbage" isn't the same thing as random noise. I have looked at the entropy graphs of encrypted data commonly. It's one of the first things I look at when looking at a new firmware image I haven't seen before.