© 2004
Canonical Ltd.
•
Terms of use
•
Data privacy
•
Contact Launchpad Support
•
Blog
•
Careers
•
System status
•
0e1f616
(Get the code!)
AT_RANDOM is used by default in the Linux kernel since 2.6.29:
http://
Almost all modern Linux systems use ASLR and stack protections that need a small amount of entropy per process. Since urandom always remixes, it doesn't strictly run out, but the entropy drops. In theory, this isn't a problem since the state of the pool cannot be extracted, guessed, or replayed.
It would be nice to have another entropy pool in the kernel for these things, like Schneier's pRNG from the Practical Cryptography book.