Can adding a tiny, ARM-based 32-bit computer to your Linux box really be all you need to improve cryptographic security?
Entropy – the contents, basically, of /dev/random – isn’t something to which most Linux users give a second thought, but it keeps server administrators and cryptographers awake at night. A system starved of entropy or, worse, filled with poor-quality entropy, can suffer everything from performance issues to security holes – and it’s a problem that becomes much larger when you get into the topic of virtualisation.