3 ms·
Known-plaintext attacks aside, if you're going to compress text, it must be done before encryption. I don't know if compression offers much protection against
by pyuser583 1y ago
Known-plaintext attacks aside, if you're going to compress text, it must be done before encryption.
I don't know if compression offers much protection against plaintext attacks.
This also makes me wonder how helpful AI is in such situations. AI is essential an extremely effective, lossy, compression algorithm.
- hcs 1y agoCompression + encryption can be dangerous if the compression rate is exposed somehow (between messages or within packets of a message). > we show that it is possible to identify the phrases spoken within encrypted VoIP calls when the audio is encoded using variable bit rate codecs https://crypto.stackexchange.com/a/2188 https://crypto.stackexchange.com/a/2188 See also https://breachattack.com/ https://breachattack.com/ when the plaintext is partially attacker-controlled.
- bee_rider 1y agoIf nothing else it would make a great twist in a fiction setting. These paraphrasing instructions could be followed. But the paraphrasing could be done using some LLM. A sufficiently advanced adversary manages to invert the model somehow, and as a result can get the original plain text out of the paraphrased message, which lets them do a known-plaintext attack, get the key, and use it on other messages. Sort of technobabble (is the idea of inverting an LLM nonsense?) but fun.