Ethereum Researchers Evaluated New Hash Functions
The Flock proof system has removed constraints, enabling the use of high-performance cryptographic alternatives.
Updated on Sept. 23, 2026 in Quantum Computing
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Ethereum researchers have evaluated several cryptographic hash functions for use in the network following the release of the Flock proof system. This development allows for the adoption of more efficient algorithms that were previously unsupported by circuit-friendly design constraints.
Why it matters
The Flock system enables developers to select hash functions based on performance and security rather than strictly on circuit compatibility. This shift allows the network to modernize its cryptographic foundation as it moves away from specialized designs.
Researchers compared candidates including SHA-2, SHA-3, BLAKE2, and BLAKE3 based on speed and security margins. BLAKE3 currently represents the fastest option for long messages, though SHA-3 holds the top position in current risk-minimizing security rankings.
The players
Ethereum
A decentralized blockchain network focused on programmable smart contracts and proof systems.
Flock
A cryptographic proof system that facilitates the use of efficient, non-specialized hash functions.
The details
The Flock system supports binary circuits and efficient hashing for any algorithm, removing the requirement for circuit-friendly structures like Poseidon. SHA-2 is noted for speed but remains vulnerable to length-extension attacks, while the Ethereum implementation of Keccak differs from standardized SHA-3 padding. BLAKE2 maintains a formal security backbone, while BLAKE3 offers higher throughput for large data payloads.
Timeline
September 23, 2026: Ethereum hash function analysis published on research forum.
The Tech Race
This transition marks a departure from the previously dominant reliance on circuit-friendly designs like Poseidon. The research now prioritizes performance efficiency, positioning BLAKE2 and BLAKE3 as primary subjects for independent cryptanalysis.
Network performance may improve as developers integrate faster hash functions enabled by the new proof system. These changes will prioritize security and throughput, though implementation timing depends on future network upgrades.
The takeaway
The move toward flexible hash functions suggests a shift toward modularity in blockchain infrastructure. Watch for future independent cryptanalysis of BLAKE2 and BLAKE3 to determine if they meet the security thresholds required for full network adoption.
Further reading
For broader context on current cryptographic developments, visit the Quantum Computing section.
Source note: This article includes information reported by The Cryptonomist.
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