Embedded Systems
Embedded Systems have real issues gathering enough entropy as they are often very simple devices with short boot times and keys are often one of the first things a system may do. A simple study demonstrated the widespread use of weak keys by finding many embedded systems such as routers using the same keys. It was thought that the number of weak keys found would have been far higher if simple and often attacker determinable one-time unique identifiers had not been incorporated into the entropy of some of these systems.
Read more about this topic: Entropy (computing)
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