The Ethereum Foundation is abandoning the Poseidon hashing protocol in favor of established alternatives like SHA or BLAKE for its post-quantum architecture. Advances in SNARKs, which are compact proofs, have eliminated Poseidon’s previous performance advantage, allowing conventional hash functions to operate efficiently enough. A production-ready leanVM is targeted for 2027, followed by deployments across Ethereum’s consensus, data and execution layers in 2028. Joint work with Eigen Labs and Succinct has increased proving speeds by 2.5 times.
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