Algorand and Ripple Press On Toward Post-Quantum Security Amid Ongoing Challenges

Algorand and Ripple are making progress toward post-quantum security but still face challenges in achieving full quantum resistance. Algorand has introduced Falcon-based post-quantum signatures, which enhance security for historical ledger confirmations. The network activated native Falcon-based post-quantum accounts on its mainnet in August 2026, providing users with an additional layer of protection.

However, Algorand's consensus infrastructure still relies on cryptographic components that are not yet quantum-resistant. Its Verifiable Random Function uses elliptic-curve cryptography, and consensus messaging relies on Ed25519 signatures, which could be compromised by a sufficiently powerful quantum computer. Algorand plans to research a post-quantum Verifiable Random Function in early 2027 and aims to achieve comprehensive quantum resilience across the network by the end of that year.

Ripple is also working toward full post-quantum security but is taking a more comprehensive approach. The company has partnered with Project Eleven to conduct a thorough assessment of the XRPL ecosystem, including validators, custody solutions, wallets, and the underlying network architecture. Ripple's roadmap targets full post-quantum security by 2028 and includes testing hybrid post-quantum signing, evaluating validator performance, and developing quantum-secure custody.