> IE you can take a secret key system, hardwire the key into the program, and tu... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		codethief on May 26, 2023 \| parent \| context \| favorite \| on: UCLA computer grad constructs “crown jewel of cryp... > IE you can take a secret key system, hardwire the key into the program, and turn it into a public key system without fear that the secret key will be recovered - instead, it will not be distinguishable from other programs with different hardwired keys. I don't understand. Shouldn't a different secret key yield a different function / circuit?

DannyBee on May 26, 2023 [–]

You can actually do it both ways - where the ciphertext is an obfuscated program, and where keys a programs and ciphertexts are short.

https://eprint.iacr.org/2013/454.pdf and friends have a direct description of the latter and references to the former.

This is just one mechanism.

Consider applying for YC's Summer 2026 batch! Applications are open till May 4
Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact