[$] LCE: Don't play dice with random numbers

Interest in high-quality random numbers has increased in parallel with the
increasing demands to secure stored data and network communications with
high-quality cryptographic keys. However, as various examples in
H. Peter Anvins's talk at LinuxCon Europe 2012
illustrated, dealing with random numbers has many pitfalls for the unwary,
and it is easy to make subtle but dangerous errors.