The Tezos network has rolled out TzEL on its testnet, a quantum-resistant privacy framework built to safeguard blockchain transaction information against emerging quantum computing capabilities.
Private transactions today may not stay private forever.
Introducing TzEL → an experimental Tezos Smart Rollup exploring private post-quantum payments.
Built using quantum-resistant cryptography via STARK proofs and Tezos Smart Rollup technology.
Learn more ↓
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— Tezos (@tezos) May 14, 2026
TzEL leverages post-quantum cryptographic techniques alongside zk-STARK proofs to secure both transaction details and encrypted payment information. The technology targets what security experts call “harvest now, decrypt later” scenarios, where adversaries capture encrypted blockchain information today with plans to decode it once quantum computers become sufficiently advanced.
Public blockchain ledgers maintain records indefinitely. This permanence creates long-term vulnerability, as information recorded currently could become accessible once quantum technology matures sufficiently.
A key technical hurdle for quantum-safe systems involves data volume. TzEL’s zk-STARK proofs measure approximately 300KB per proof—significantly larger than privacy verification methods in current blockchain applications. According to Tezos, its Data Availability Layer architecture accommodates these expanded proof sizes while keeping consensus node operations unaffected.
Currently operational on testnet, TzEL remains under active development. The platform is simultaneously developing quantum-resistant signature capabilities for user wallets as part of comprehensive network enhancement initiatives.
Arthur Breitman, who co-founded Tezos, emphasized the project is moving proactively while much of the sector stays passive. He specifically targeted certain members of the Bitcoin ecosystem.
“There are Bitcoiners being applauded on stages for half-baked crank theories about quantum mechanics that fly in the face of established physics,” Breitman said.
His urgency isn’t universally accepted. Adam Back, a pioneering Bitcoin developer, believes systems powerful enough to compromise Bitcoin cryptography remain two decades away. Michael Shaulov, CEO of Fireblocks, has similarly downplayed concerns, stating the quantum danger is “not actually a threat as people make it out to be.”
Breitman rejected this perspective. “Elliptic curve signatures won’t be broken in a few months, but there’s a good chance they’ll be broken in a few years,” he said. “That leaves enough time to upgrade, but not enough to quibble.”
Project Eleven, specializing in quantum security, has projected that Q-Day—when quantum computers can compromise current encryption standards—might materialize as soon as 2030.
Tezos isn’t operating in isolation on quantum preparedness. The Solana ecosystem saw two prominent validator clients release experimental implementations of Falcon, a post-quantum signature protocol, this past April.
MARA Holdings established the MARA Foundation to advance Bitcoin technology development, with quantum-resistant security among its research priorities. Analysts at Coinbase identified Algorand and Aptos as blockchain networks with notable progress in quantum-resistant cryptography implementation.
Researchers at Bernstein project a three-to-five-year timeframe for the cryptocurrency sector to complete its transition before quantum computing poses genuine risks to Bitcoin infrastructure.
Breitman identified developer inaction as the primary concern. “Work to make the entirety of Tezos post-quantum is active and ongoing,” he added.
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