SP 800-90A is a publication with the title Recommendation for Generation Using Deterministic Random Bit Generators.

The publication contains the specification for three allegedly cryptographically secure number generators for use in : (based on hash functions), HMAC DRBG (based on HMAC), and CTR DRBG.

en.wikipedia.org/wiki/NIST_SP_

Chapitre 10.1:
olvid.io/assets/documents/2020

#nist #randomnumber #pseudorandom #cryptography #hashdrbg #olvid #chiffrement

Last updated 2 years ago

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Challenge: Given a 33 bit shift register based random number generator, shifting 32 times to make a random integer, we observe that a given value will always appear twice in the sequence. Generally unevenly spaced. How to find a value which has the closest repeat?

We could run for 2^33 iterations and keep a record in a many gigabyte array, but I imagine there's a better way.

Boosts OK!

@ColinTheMathmo

#math #maths #polynomials #lfsr #prng #pseudorandom

Last updated 2 years ago

SP 800-90A ("special publication") is a publication by the National Institute of Standards and Technology with the title Recommendation for Using Deterministic Random Bit Generators ( ). The publication contains the specification for three allegedly cryptographically secure number generators for use in : Hash DRBG, DRBG, and CTR DRBG.



en.wikipedia.org/wiki/NIST_SP_

#nist #randomnumbergeneration #DRBG #pseudorandom #cryptography #hmac #chiffrement #cryptographie #cybersécurité

Last updated 2 years ago

· @xpil
606 followers · 4864 posts · Server fosstodon.org

In March 2021 I was obsessed with Langton's Ant experiments, but eventually after generating thousands of images of various walks I got bored.

This morning, I came up with an idea: how about adding primality check to the algorithm? For example if the current step number is a prime number, reverse walk direction.

Result?

More irregular, more interesting walk paths!

#ants #langtonAnt #pseudorandom #generatedArt #isuckathashtags

Last updated 3 years ago