Cryptography researchers at INRIA published terrifying math in early 2026. They proved it takes only 1,193 logical qubits to break the 256-bit elliptic curves securing almost every digital asset on earth. That is a 44% reduction from previous estimates. The National Institute of Standards and Technology (NIST) instantly updated its quantum danger zone timeline. They pulled the threat window forward from 2030 down to 2029. The clock is ticking fast.
On Tuesday, the Stellar Development Foundation officially unveiled its Quantum Preparedness Plan. It is a three-stage roadmap designed to protect the XLM blockchain network from impending quantum computer account takeovers.
Stage 1 happens right now in 2026. Post-quantum signature verification goes live on Soroban, Stellar’s smart contract layer. Enterprise wallets can start migrating immediately using NIST-grade signature standards. Stage 2 hits in 2027. A protocol-level upgrade will let every existing Stellar account add a quantum-safe signer right next to its current Ed25519 signer. Users do not even have to change their addresses or move balances.
What happens to the ghosts in the machine? A major unresolved challenge surrounds dormant accounts. If the network initiates a hard cutoff to kill the old cryptography in Stage 3, it effectively freezes accounts held by unreachable users. The Foundation opened a community discussion this week to figure out exactly how to handle these stranded assets before the quantum threat materializes.
Why Stellar Can Upgrade Faster Than Bitcoin and Ethereum
Stellar holds a structural advantage over the two biggest networks in the space. Bitcoin and Ethereum addresses are mathematically derived hashes of their public keys. To migrate those wallets to post-quantum standards, users must either expose their keys or physically move their funds to new addresses.
Stellar built its architecture differently. Its account identities are completely separated from their signing keys. This decoupling allows Stellar to execute a clean, in-place upgrade without forcing users to juggle new wallet strings.