Stanford cryptographer Dan Boneh warned that a hasty transition to post-quantum cryptography is more likely to cause a catastrophic bug than a quantum attack

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Chainalysis took its KYT, its other address-screening products and its login page offline after flagging abnormal activity from an intrusion into its systems

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A one-block Ethereum block reorganization removed an unconfirmed 10 Ether deposit, triggering a bug that issued duplicate refunds

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Ethereum Foundation researcher Justin Drake announced at Devcon 8 that Ethereum's post-quantum security roadmap is accelerated by about a year, from its December 2029 target to December 2028

Implementing post-quantum zero-knowledge proof systems in Shielded Bitcoin increases the required transaction size

Zcash wallet scanning relies on pre-quantum cryptography that requires upgrading to post-quantum key exchange mechanisms like ML-KEM

A quantum computer capable of breaking elliptic curve cryptography could counterfeit Zcash prior to the implementation of post-quantum soundness

The Zcash post-quantum roadmap consists of three pillars: quantum recoverability, post-quantum privacy, and post-quantum soundness

The Zcash Near Intents integration implemented 100% quantum unlinkability for supported wallets

Quantum recoverability allows users with funds in Zcash shielded pools to safely extract their assets if quantum computers emerge

Quantum recoverability functionality was activated in a Zcash shielded pool prior to October 2026

Google researchers estimated that a sufficiently powerful future quantum computer could theoretically derive a Bitcoin private key from an exposed public key in approximately 9 minutes.

Starknet's underlying ZK-STARK technology relies on hash-based cryptography and programmable accounts that allow adopting new signature schemes without a protocol upgrade.

Starknet aims to achieve full post-quantum security by 2027, two years ahead of Ethereum's projected 2029 target for quantum resistance.

Starknet relies on Ethereum for bridge messaging and blob data availability using KZG commitments and elliptic-curve cryptography, which StarkWare identified as post-quantum vulnerabilities that cannot upgrade independently while remaining a Layer 2.

Anza is researching a post-quantum upgrade named Quantumglow to introduce hash-based signatures while preserving 150-millisecond finality

Zakura's proposal for per-swap viewing keys limits potential quantum exposure to a single swap while keeping a wallet's main spending key unchanged, maintaining funds under a single account

A quantum computer running Shor's algorithm could theoretically recover an incoming viewing key from a publicly exposed Zcash address to link an account's wider payment history.

Zcash developers have targeted January 2027 for introducing post-quantum signature opcodes to protect transparent transactions.

Zcash developer Zakura proposed assigning a one-time incoming viewing key to every ZEC swap routed through NEAR Intents to protect transaction privacy against future quantum computing risks.

Shielded Labs announced project Epoch on October 1, 2026, aiming to develop post-quantum cryptography for Zcash by the end of 2027.