How to deal with a slow SecureRandom generator?

Question

If you want a cryptographically strong random numbers in Java, you use SecureRandom. Unfortunately, SecureRandom can be very slow. If it uses

Answer 1

You should be able to select the faster-but-slightly-less-secure /dev/urandom on Linux using:

-Djava.security.egd=file:/dev/urandom

However, this doesn't work with Java 5 and later (Java Bug 6202721). The suggested work-around is to use:

-Djava.security.egd=file:/dev/./urandom

(note the extra /./)