Tezos Tests Post-Quantum Privacy as Founder Slams 'Half-Baked' Bitcoin Quantum Theories
Arthur Breitman, Tezos co-founder, warns that quantum computing poses a real and underestimated threat to blockchain privacy, despite some in the crypto industry dismissing it as speculation. He highlights the risk of “harvest now, decrypt later” attacks, where attackers collect blockchain data today and decrypt it in the future once quantum computers are capable of breaking elliptic curve cryptography. Tezos is proactively addressing this with TzEL, a post-quantum privacy system launched on testnet to secure private payments and encrypted data. Breitman criticizes both industry complacency and pseudo-scientific skepticism, particularly within the Bitcoin community. He notes that post-quantum cryptography, like zk-STARK proofs, introduces scaling challenges due to larger data requirements, but Tezos’s data availability layer is designed to manage this. Tezos is also adding post-quantum signature support as part of broader defenses. Breitman stresses that while there is still time to transition before so-called “Q-Day” (when quantum computers can break current encryption), the opportunity window may close quickly, and urges the industry to act with urgency rather than delay upgrades.
