You don't even need sensors. STMicroelectronics has a TRNG block [1] that "passes" NIST SP 800-22 statistical analysis [2]. I used quotes because the 800-22 is

You don't even need sensors. STMicroelectronics has a TRNG block [1] that "passes" NIST SP 800-22 statistical analysis [2]. I used quotes because the 800-22 is an analysis test suite and the notion of passing is based on your hypothesis parameters, but the suite itself is considered the de-facto analysis mechanism. I don't follow where the confusion is coming from? [1] https://www.st.com/resource/en/application_note/dm00073853-stm32-microcontroller-random-number-generation-validation-using-the-nist-statistical-test-suite-stmicroelectronics.pdf https://www.st.com/resource/en/application_note/dm00073853-s... [2] https://csrc.nist.gov/Projects/Random-Bit-Generation/Documentation-and-Software https://csrc.nist.gov/Projects/Random-Bit-Generation/Documen...