Tagged Questions
6
votes
2answers
246 views
Filling the disk with random data prior to encryption?
Filling the disk with random data prior to encrypting it will supposedly make it harder for the attacker to perform any cryptanalysis. Most sources seem to state this is because it will be harder for ...
6
votes
4answers
1k views
What do I need to configure, to make sure my software uses /dev/urandom?
When setting up a server, what configuration changes do I need to make sure that all of the software uses /dev/urandom instead of /dev/random?
Some servers don't have much entropy in the entropy pool ...
3
votes
3answers
362 views
Pseudo Random Generator is not initialized from the (entropy pool)?
The RHEL5 manuals state that /dev/urandom will use the entropy pool until it's exhausted, and then it will resort to a fall-back pseudo-random algorithm, so that it will never block.
But when ...
3
votes
2answers
958 views
/dev/random security holes
I'm doing some reading into the security issues surrounding /dev/random but it's proving to be hard to find good sources of information. Can anybody help? I've asked Google and got a bunch of articles ...
7
votes
2answers
339 views
Is a rand from glibc's rand secure for a login key?
Same question as Is a rand from /dev/urandom secure for a login key, but with glibc's rand function instead of /dev/urandom. And what would be a sufficiently secure seed generator?
31
votes
2answers
3k views
Is a rand from /dev/urandom secure for a login key?
Lets say I want to cookie for a user, would simply going to /dev/urandom, generating a 1024 bit string, checking if it already exists (and looping till I get a unique one) suffice? Or should I be ...
