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Morning Edition · Friday, August 7, 2026Published at 10:25 AM EDT · New York
Cryptographers Dispute the Security of Poseidon, the Hash Function Underpinning Ethereum's Zero-Knowledge Proofs
One researcher put Poseidon's quantum preimage resistance at just 63.75 bits, well below common security targets, while a rival proposal called Ashlar is inviting cryptanalysts to try to break it before it is trusted with real value.
A thread posted to ethresear.ch this week argues that Poseidon, a hash function widely used inside zero-knowledge proof systems on Ethereum and its rollups, is not as secure as its deployment suggests. The post calculates Poseidon's classic…
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Quantum Risk Moves From Theory to Crypto Roadmaps
Over the next 3-6 months, quantum-resistance becomes a concrete design and custody concern across major chains and institutional custodians, driving opt-in post-quantum schemes and 'long-dormant coin' risk discussion.
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Comments
1Aug 7, 6:43 PM · edited
Arithmetic hash functions are unsafe. BLAKE3 is the future...