0
$\begingroup$

What kind of attack of image encryption that exist out there, especially if the cipherimage was created using secure stream-cipher like Salsa20 (256 key) or ChaCha20 (256 key)?

From https://cr.yp.to/streamciphers/attacks.html#chacha20 page, i know that the algorithm itself can be attack using Brute force attack to find 256-bit key (But, of course this is gonna takes alot of time, resources & depending of the complexcity of the key).

So, my point is, what kind attack that is most 'suitable' for this case & is there any tools for that?

$\endgroup$

1 Answer 1

2
$\begingroup$

There are no known practical attacks faster than brute-force for either mentioned algorithm. Building a practical quantum computer (assuming that's actually physically possible) and using that would reduce the difficulty to 2^128 sequential quantum operations, which will still take longer than the expected time for the Sun to turn into a red giant and engulf the Earth.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.