Key facts
- Stellar announced a three-stage plan to transition to quantum-safe cryptography.
- Enterprise wallets can begin migrating in 2026, with all accounts able to upgrade by the end of 2027.
- The migration allows users to swap in quantum-safe cryptography without changing their address or migrating their balance.
- Quantum computers pose a threat to current cryptographic foundations securing digital assets.
- Estimates for 'Q-Day,' when quantum computers could break current cryptography, are as early as 2029-2030.
Stellar is preparing for the potential threat of quantum computing by implementing a three-stage migration plan to quantum-safe cryptography. This initiative aims to safeguard the network's integrity and user assets from future decryption capabilities of advanced quantum machines.
The plan addresses two primary threats: the compromise of the network's consensus mechanism through forged validator signatures and the ability to derive private keys from public ones, leading to account takeovers. Stellar's architecture, which separates account identity from signing keys, provides an advantage, allowing users to adopt new cryptographic standards without altering their addresses or balances.
The migration will commence in 2026 with the addition of post-quantum signature verification to Stellar's smart contract layer, enabling enterprise wallets to transition. By 2027, a protocol-level upgrade will permit all Stellar accounts to incorporate quantum-safe signers while maintaining their existing addresses. The final phase involves the complete deprecation of current cryptography, timed according to advancements in quantum computing and community readiness.
A significant challenge remains concerning dormant accounts whose owners are unreachable. The Stellar Development Foundation has indicated that a decision on how to handle these accounts will require broad community discussion. Experts widely agree that quantum computers will eventually break the elliptic curve cryptography that underpins most major blockchain networks, including Bitcoin and Ethereum, making proactive measures like Stellar's increasingly critical.