The XRP Ledger Foundation's 2027 protocol roadmap, updated on November 4, proposes a quantum-resistant account design that allows users to add a new signing key based on the ML-DSA-44 signature scheme approved by NIST in 2024. The update addresses a critical vulnerability: every transaction ever signed on XRPL has exposed the account's public key on-chain, leaving all accounts — including exchange wallets — potentially susceptible to future quantum computer attacks. The new quantum-resistant key and signature total 3,732 bytes, adding approximately 3.6KB per protected transaction. However, users will bear no additional cost; the base fee remains unchanged, with network operators absorbing the extra storage overhead. Developers are currently resolving inconsistencies in key generation across code versions and plan migration research in the first half of 2027, targeting a full quantum transition by 2028.