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The Hybrids Long Bet ML-KEM-768 vs. X25519 This is a public wager between Matthew Green ("Lattice Cryptanalysis side") and Filippo Valsorda ("Quantum Computers side"). Stakes are settled by charitable donation (see Section 7). It is motivated by views about the security and deployment relevance of the X25519MLKEM768 hybrid handshake. Notwithstanding that motivation, this wager is not about any hybrid handshake, combiner, or protocol composition. The covered constructions are the separate underlying components defined in Section 1. 🗞️ As reported in The Register. Deadline. December 31, 2040, 23:59:59 UTC. Stakes. Main wager: what breaks first, ML-KEM-768 or X25519? → USD $5,000 donation. Secondary wager: will ML-KEM-768 weaken significantly? → USD $1,000 donation. Moral win: Filippo Valsorda buys Matthew Green drinks if ML-KEM-512 weakens. Back bets. Anyone can join the bet by choosing a side and stakes for the main and/or secondary wager. If the selected side loses, the back bettor donates the staked amount to the charity chosen by the winner. Back bettors don't select arbiters or charities. Tip Do you have an opinion and want to put your money where your mouth is? Do you like raising money for charity through abstruse wagers? Submit a PR and add your name below!