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7
votes
3answers
500 views

Does hashing a PRNG make it cryptographically secure?

Would hashing the result of a regular random number generator produce a cryptographically secure PRNG? For example, would sha1(rand()) effectively be a secure PRNG? Assuming it doesn't, how would ...
1
vote
1answer
295 views

Using Random Numbers As Session variables

I am using randomly generated numbers as session variables to identify the sessions in a PHP application. To make further security proof what ways should I follow?
11
votes
4answers
1k views

Why OpenSSL can't use /dev/random directly?

I couldn't find the answer for the reason anywhere, even the wiki page doesn't explain it. This seems like using a PRNG for seeding an another PRNG. The first one (/dev/random) may itself be seeded by ...