[Cryptography] Generate Random Data From Sound Card

[David Kane-Parry]

On 6 Mar 2026, at 22:47, Tony Patti <crypto at glassblower.info> wrote:
> According to page 289 of David Johnston's book "Random Number Generations - Principles and Practices: A Guide for Engineers and Programmers" (which I highly recommend), the intel RDRAND entropy source is NOT THERMAL, quoting from that page:
> "The entropy source is based on metastability of a latch with a differential feedback circuit."

Quoting from page 12 of https://www.intel.com/content/dam/develop/external/us/en/documents/441-intel-r-drng-software-implementation-guide-final-aug7.pdf :

"The ES runs asynchronously on a self-timed circuit and uses thermal noise within the silicon to output a random stream of bits at the rate of 3 GHz."

- d.

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