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quantum-resistant

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first_img Ripple has established a four-phase quantum-resistant migration plan for the XRP Ledger

Ayo Akinyele, Senior Director of Engineering at Ripple, stated that the company is developing a four-phase quantum-resistant migration plan for the XRP Ledger, aiming to complete the transition before quantum computers become a real threat. The plan includes assessing the network's exposure, testing quantum-resistant cryptographic solutions, running existing security systems in parallel with quantum-resistant alternatives, and preparing emergency response pathways for scenarios where quantum computing advances exceed expectations.Akinyele emphasized that migration is not just about replacing a cryptographic algorithm, but requires more flexible infrastructure, stronger key management, and clearer upgrade paths. The XRP Ledger has supported changing the keys that control accounts without altering the accounts themselves, a feature that is expected to reduce the difficulty of future migrations, but independent validators on the network still need to coordinate any broader rule changes.Meanwhile, Anthropic's model last month reduced the workload required to break leading post-quantum signature candidates by 67 million times, and Bitcoin and Ethereum developers also released their respective migration plans this week. Akinyele pointed out that AI and quantum computing are different technologies, but they are driving financial infrastructure to evolve in the same direction, as AI agents begin to trade and pay autonomously, raising new requirements for payment infrastructure that is always online and natively internet-based.

Starknet completes quantum-resistant signature transfer testing, exploring wallet upgrade paths that do not require migration

Starknet announced that it has completed the quantum-resistant signature transfer test, where a wallet account using a quantum-resistant signature mechanism completed a real transfer on the Starknet mainnet, with a transaction fee of about 6 cents, and can be queried through the block explorer. This account is currently an experimental, unaudited version, mainly used for research testing. StarkWare stated that this transfer benefits from the design of the Starknet account model.Unlike most blockchains that fix the signature algorithm at the protocol layer, each account on Starknet is a smart contract that can autonomously define the accepted signature schemes, allowing users to upgrade their wallets from traditional elliptic curve signatures to quantum-resistant signatures without hard forks, asset migrations, or changing addresses. StarkWare pointed out that most blockchains face quantum computing risks because wallet signatures and underlying verification systems rely on elliptic curve cryptography. Once large-scale quantum computers appear, running Shor's algorithm could potentially break the related encryption systems. Currently, the Starknet ecosystem supports a quantum-resistant signature scheme based on Falcon-512, which is part of the NIST post-quantum cryptography standardization process, with relevant implementations promoted by ecosystem teams and organizations such as OpenZeppelin.

BSC releases a report on quantum-resistant cryptography migration: transaction signatures have switched to ML-DSA-44, TPS testing has decreased by about 40%-50%

On May 14, BNB Chain released the "BSC Post-Quantum Cryptography Migration Report," stating that it has completed the migration testing for quantum-resistant cryptography for transaction signatures and the consensus layer, using the NIST standardized post-quantum signature algorithm ML-DSA-44 (Dilithium) and the pqSTARK aggregation scheme.The report shows that BSC has replaced transaction signatures from ECDSA to ML-DSA-44 and switched consensus voting aggregation from BLS12-381 to pqSTARK to address the potential threats posed by future quantum computing to the existing elliptic curve cryptography system. However, post-quantum signatures also significantly increase the on-chain data volume: the size of a single transaction has increased from about 110 bytes to approximately 2.5KB; the block size in a 2000 TPS scenario has increased from about 130KB to around 2MB; and the TPS in the testing environment has decreased by about 40%-50%.BSC stated that the current network bottleneck mainly comes from the larger transaction data propagation, rather than the consensus protocol itself. Meanwhile, the consensus layer aggregation still maintains high efficiency, with pqSTARK achieving a signature compression ratio of about 43:1, and the additional burden on validators remains within a controllable range. The report concludes that existing technology can achieve "quantum-resistant" deployment for blockchain, but future issues related to network bandwidth and data scalability still need to be addressed.

Opinion: The Bitcoin community is reaching a preliminary consensus on quantum threats and promoting a roadmap for quantum-resistant upgrades

According to FinanceFeeds, Alex Thorn, the research director of Galaxy Digital, stated that as advancements in quantum computing hardware accelerate, the Bitcoin community is shifting from decentralized debates to forming a preliminary consensus on quantum threats. The core direction is to gradually introduce post-quantum cryptography (PQC) through soft forks, achieving an upgrade of the address system and long-term security assurance.The report points out that the current Bitcoin signature mechanism, which uses the Elliptic Curve Digital Signature Algorithm, can theoretically be cracked by Shor's algorithm. Approximately 2 million BTC from early p2pkh addresses are at risk because their public keys have been exposed, facing the potential risk of "collecting first and decrypting later." The community tends to promote a "migration window" mechanism to guide users in transferring their assets to new quantum-resistant addresses, and after a multi-year grace period, to implement freezing or destruction of untransferred assets to prevent large-scale market impacts in extreme situations. Additionally, the consensus includes enhancing "cryptographic agility," which allows protocols to switch signature algorithms without interrupting the network.The current proposal leans towards a dual-signature mechanism that uses ECDSA and PQC (such as Dilithium) in parallel, ensuring security redundancy while facilitating a smooth transition. Analysts believe that this approach transforms the quantum threat from a "black swan event" into a manageable technological upgrade, helping to solidify Bitcoin's security foundation as a long-term store of value asset.

Ripple announced a quantum resistance roadmap, aiming to make XRP Ledger quantum-resistant by 2028

Ripple officially announced its quantum resistance roadmap, with the core goal of making the XRP Ledger (XRPL) quantum-resistant by 2028. The roadmap primarily addresses the potential attack mode of "harvest now, decrypt later," where attackers collect encrypted data now and wait for future quantum computers to mature before cracking it.The entire plan will be implemented in four phases:Phase 1: Q-Day Emergency Preparedness (Already Started). Establish a Q-Day emergency response mechanism. If the existing classical encryption system is suddenly compromised, the network will immediately stop accepting traditional public key signatures, forcing a migration to quantum-safe accounts. At the same time, explore asset ownership verification solutions based on Post-Quantum ZK-proofs, allowing existing account holders to safely recover funds in emergencies without exposing vulnerable keys.Phase 2: Risk Assessment and Algorithm Testing (First Half of 2026). Conduct a comprehensive assessment of the impact of post-quantum cryptography on the performance, storage, and bandwidth of the XRP Ledger network. Collaborate with Project Eleven to conduct validator-level testing and Devnet benchmarking, deploy NIST standardized ML-DSA quantum-safe signature schemes, and develop prototypes for post-quantum custodial wallets. Core engineer Denis Angell has already deployed ML-DSA signatures on XRPL's AlphaNet.Phase 3: Devnet Hybrid Integration (Second Half of 2026). Parallel integration of candidate post-quantum signature schemes with existing elliptic curve signatures on the developer network (Devnet), allowing developers to test performance and system impacts without affecting the mainnet. At the same time, explore post-quantum zero-knowledge proof primitives and homomorphic encryption technologies for Confidential Transfers to enhance the privacy and compliance capabilities of tokenized real-world assets on XRPL.Phase 4: Full Mainnet Upgrade (Target 2028). Submit a formal protocol amendment, which will be fully enabled on the mainnet after being approved by validator votes, to implement native post-quantum cryptography. Focus on production-ready optimization: throughput tuning, validator reliability assurance, and coordinated migration of the ecosystem, ensuring a complete transition without affecting network speed and settlement finality.
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