Tool for measuring entropy quality? Is there a tool available for Linux systems that can measure the "quality" of entropy on the system? I know how to count the entropy: cat /proc/sys/kernel/random/entropy_avail And I know that some systems have "good" sources of entropy (hardware entropy keys), and some don't (virtual machines). But is there a tool that can provide a metric as to the "quality" of the entropy on the system?

< works for me.


sudo apt-get install ent
head -c 1M /dev/urandom > /tmp/out
ent /tmp/out