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Stellar launches quantum security plan to upgrade all accounts by end-2027

Stellar developers unveiled a three-step roadmap to shift to quantum-resistant cryptography to counter threats from quantum computers. The plan starts in 2026 with changes for corporate wallets and institutions, then a 2027 protocol upgrade enabling all accounts to add quantum-resistant signers while keeping existing addresses. A final phase will retire the current cryptography, with timing to be decided later. The foundation flagged dormant accounts as a key challenge.