Editing Semantic security (section)

==== Entropy Collection ====
Secure randomness requires high entropy sources, such as:

* Hardware-based generators (e.g., Intel [[RDRAND]])<ref name="NIST90B">{{cite web |date=2018-01-10 |title=Recommendation for the Entropy Sources Used for Random Bit Generation |url=https://csrc.nist.gov/publications/detail/sp/800-90b/final |access-date= |publisher=National Institute of Standards and Technology (NIST)}}</ref>
* Physical sources, like keystroke timing<ref name="NIST90B" />
* Dedicated security hardware, including [[Hardware security module|HSMs]] and [[Trusted Platform Module|TPMs]]<ref name="NIST90B" />