Cryptographer Sean Cheetham on the crypto attack a paper said was impossible, until Claude Mythos pulled it off: "It is a novel breakthrough, but it's not a cause for mass panic at the moment. One of the schemes they headline as being broken is something going through the NIST process for standardization. It's a lattice-based scheme, not unlike some of the others already standardized, but still slightly different." "There was a paper a year ago that said the security of this scheme would…