4 ms·
A one-time pad has been proven to be unbreakable. https://en.wikipedia.org/wiki/One-time_pad https://en.wikipedia.org/wiki/One-time_pad Quote "Claude Shannon p
by bouncycastle 7y ago
A one-time pad has been proven to be unbreakable.
https://en.wikipedia.org/wiki/One-time_pad https://en.wikipedia.org/wiki/One-time_pad
Quote "Claude Shannon proved, using information theory considerations, that the one-time pad has a property he termed perfect secrecy"
- mantap 7y agoOne time pads just push the problem to the random number generator (which has to be 100% perfect, free from correlations and bias). How exactly does one prove that their hardware RNG is uncorreleated? e.g. what you thought was RF noise could actually contain the theme tune to Barney the dinosaur. The most provable way we have to generate random numbers of the quality necessary is to generate them using... cryptographic ciphers.
- dark_glass 7y agoWhy not roll physical dice?
- diffeomorphism 7y agoHow many dice would you have to roll for sending this message? How long would that take?
- shadowprofile77 7y agoWhat about collecting cosmic background radiation and converting it to one-time pad bits?
- bouncycastle 7y agoHardware random number generators poof of correctness comes from... physics. Unless there is some fundamental hole in our understanding of physics, including thermodynamics and quantum mechanics, HRNG are the best source. Using cryptographic ciphers for pseudorandom functions can be catastrophic, as seeding them correctly is a problem. (You still need some entropy from outside for seeding) Of course, using one time pads is not really practical either.