I want to know how rand() works (even when I don't provide any seed how it produces PRNs?) thanks!
Given two arbitrary/random $n$-bit words, how could one best mix them to get one $n$-bit word for general crypto usages? I suppose that one should have an adequate measure of goodness of the mix ...
Suppose I have a random number (eg 625 467 921). I use it once to encrypt a message OTP style, and when I want to use them again, I reverse them (eg to ...
We got this riddle during a contest. This code requires 36 characters to be used: a->z AND 0->9. Can you solve it? hacgp6by68astytga5azagndca8jopc Need help solving it.