Randar: A Minecraft exploit that uses LLL lattice reduction to crack server RNG

Post by 1letterunixname » Sun, Apr 21, 2024, 6:25 PM UTC

romanows wrote: post #102

spacebacon wrote: post #85

Earlier quoted context omitted.

I had to checkout your Git after this awesome reply. Gotta love Hacker News. I had a cool vision for “tag play” … I visualize mini RFID records on a turn table that tell Roku what to play.

DJs have timecoded vinyl records that do something like this, even allowing the DJ to scratch the mp3 that is being played.

Serato is digital pretend scratching. Might as well use a DJ controller. Real scratching requires a proper tt and skill like Mix Master Mike. Hell, I have 2 Pioneer DL-5 and a Pioneer DJM-600, but these tts aren't good for scratching because of their straight arms, they're good for gapless playback. https://youtu.be/58Y--XTIRZ8

Post by eru » Sun, Apr 21, 2024, 11:55 PM UTC

Elucalidavah wrote: post #103

alickz wrote: post #65

Earlier quoted context omitted.

I'm surprised they don't use some form of hardware based RNG. I assume there's many good reasons https://en.wikipedia.org/wiki/Hardware_random_number_generat...

> don't use some form of hardware based RNG I've always wondered: why aren't ADCs (e.g. mic input) and temperature sensors considered a good source of entropy, particularly if the lower bits are taken?

If you just want any old entropy, and don't care about proving to someone else that your entropy is good, these are acceptable. But it's honestly really easy to get entropy on that grate, and thanks to modern cryptographically secure PRNG, you don't need a lot of 'real' entropy. You can stretch it out forever.

If you want/need to be able to argue to a third party that your entropy was good, you can spend a bit more.

How do you convince anyone that your mic input was actual real mic input, and not just a sequence of bits you made up to be convenient for you?

Re: Randar: A Minecraft exploit that uses LLL lattice reduction to crack server RNG

Re: Randar: A Minecraft exploit that uses LLL lattice reduction to crack server RNG