Post #1253032
2026-03-25 21:25 UTC
@esoteric_programmer
Do you have a link? Quantum computing doesn't break hash algorithms, although I think it may help create collisions. Maybe @sophieschmieg knows.
Replies (1)
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@sophieschmieg@infosec.exchange 2026-03-25 21:34
@dangoodin @esoteric_programmer yeah, the SHA1 breakage happened with good old transistor based classical computers: https://csrc.nist.gov/news/2017/research-results-on-sha-1-collisions Quantum attacks on hash functions exist, but are not considered feasible in practice, similar to attacks on other symmetric cryptography, the quantum advantage is very small in this case, just an asymptotically polynomial speedup, that is not believed to be an actual speedup for the sizes in use. This differs from asymmetric cryptography (RSA and elliptic curves), where quantum computers have an exponential advantage over the best known classical algorithms.