Friday, 2 February 2018

Linux Security -- Entropy explained

Linux Security -- Entropy explained

Why you should care. These days everyone is spying on us, from criminals to our own governments and ISP's. To protect ourselves we use things like encrypted passwords, encrypted hard drives, secure VPN's etc. All of these things rely on good encryption and good encryption relies on a good source of good quality random numbers. By good quality we mean numbers that are as close to truly random as possible. The more random, the more secure you are. The problem is that generating truly random numbers is a really difficult task. To the point that governments use things like the decay of radioactive elements, to solar radiation to generate random numbers.
For those that are interested, Linux can use external sources of entropy and there are many sources available, search and find.
http://jhurani.com/linux/2017/11/01/entropy-explained.html

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