Let’s Get Random: Under the Hood of PHP 7’s CSPRNG

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June 2, 2017

Speaker: Sammy K Powers

Description

Sammy Powers, @SammyK

Randomness is really important in many cryptographic contexts. Unfortunately true randomness is a non-trivial achievement for computers. In fact, using weak sources of randomness can leave your application open to myriad vulnerabilities. Enter: a good cryptographically secure pseudorandom number generator (CSPRNG). We’ll discuss the importance of using good sources of randomness, the CSPRNG options we had in PHP 5.x, and how the new-hotness CSPRNG functions in PHP 7 work under the hood.

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