Algorand currently stands apart from other major chains in implementing quantum resistance, a detail that challenges the assertion that “almost no blockchains are quantum resistant.” While Bitcoin merged proposals for quantum-resistant output types into its repository in February 2026, those changes are not yet live on the chain. The Ethereum Foundation established a dedicated post-quantum security team in January 2026, publishing its work at pq.ethereum.org with a plan focusing on both validator and account-level adoption before full protocol migration.

Algorand’s Falcon Implementation Leads Quantum-Safe Blockchain Progress

Algorand currently employs the Falcon post-quantum signature scheme for State Proofs, a feature active since 2022, distinguishing it from other major blockchains still reliant on vulnerable elliptic-curve cryptography. The September 2024 consensus upgrade integrated a native falcon_verify opcode into the Algorand Virtual Machine, enabling on-chain verification of these signatures, and in November 2025, the company announced support for Falcon-backed accounts on its main network, the company says.

While standard Algorand accounts continue to use Ed25519 signatures, the availability of these primitives represents a step toward quantum resistance, as it moves beyond proposed solutions and into live implementation. The implementation of Falcon does not provide uniform quantum resistance across the entire Algorand network. However, it establishes a functional pathway for securing transactions against attacks from future quantum computers.

The Ethereum Foundation stood up a dedicated post-quantum security team in January 2026 and publishes its work at pq.ethereum.org, alongside the roadmap page at ethereum.org, detailing this roadmap. The Ethereum team’s plan centers on hash-based signatures for validators and account abstraction, allowing individual accounts to adopt quantum-safe schemes proactively. Bitcoin, despite merging BIP-360 into its repository in February 2026, defining a quantum-resistant output type, has not yet activated the proposals on its main chain.

The merged proposals are not consensus, and the proposals remain unimplemented. This highlights a common challenge in blockchain security upgrades: the gap between defining a solution and deploying it across a decentralized network. The Ethereum Foundation’s approach, and Algorand’s current status, demonstrate that simply having a plan is insufficient. Active implementation and live functionality are necessary for achieving genuine quantum resistance.

Quantum resistance is not the same as protection, and the time required to migrate wallets, exchanges, and contracts presents a substantial coordination problem, according to the company. The challenge of migration highlights the importance of account-level protection, where smart accounts can enforce post-quantum signatures to safeguard funds without requiring a chain-wide fork. Solutions like Quip Accounts, using hash-based signatures on Ethereum, EVM Layer 2s and Bitcoin Layer 2s, allow assets to remain on their existing chains while gaining quantum-safe protection.

Algorand’s early adoption of Falcon, while not a complete solution, positions it uniquely in the current landscape, offering a live, albeit partial, defense against the looming threat of quantum computing. When investigating claims of quantum resistance, the source suggests asking three key questions: what signature scheme guards a spend, has the implementation been audited, and does the protection cover assets where they already live?

Source: https://quip.network/blog/which-cryptocurrencies-are-actually-quantum-resistant-an-honest-map

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