Skip to content

Comment on Ask HN: How can i verify perfect secrecy of a cryptosystem?parent

Comments

Have you read the Wikipedia article? It's not written for lay people but it's not bad. Using it you should be able to prove to yourself that if the key has less entropy than the message it's not possible to achieve this level of security. https://en.wikipedia.org/wiki/Information-theoretic_security

i'm not using any traditional math

That doesn't get you an out - the theorems don't care how you transform M to C.

sgyOP

right. but, again, the whole system doesn't even rely on entropy. i was referring to existing literature as an analogy to, perhaps, better clarify the idea. it seems i was mistaken doing so.

The sci.crypt faq has more information. http://www.contrib.andrew.cmu.edu/~shadow/crypt.html

http://www.faqs.org/faqs/cryptography-faq/

It might be an idea to read about different attacks - known plaintext etc - and seein if your system is still secure. (It won't be, so if you can't find the flaw you know you need to look more).

sgyOP

thanks. looking into them ..

AboutSource Built by g1lg1l

Hackerly is an independent reader for Hacker News, built on the public HN API. Not affiliated with Y Combinator.