The Stellar Development Foundation dropped its Quantum Preparedness Plan on June 9, laying out a structured three-stage roadmap to harden the XLM network against the looming threat of quantum computing.

The three-stage plan, explained

Stage 1, launching in 2026, introduces post-quantum signature verification algorithms as native host functions within Stellar’s Soroban smart contracts. The network will start supporting new cryptographic methods that quantum computers can’t crack, but it won’t force anyone to switch immediately.

Stage 2, targeted for 2027, takes things a step further by introducing new quantum-safe signer types through opt-in channels for existing accounts. Users and enterprises can voluntarily upgrade their signing mechanisms without being pushed into it.

Stage 3 will deprecate Ed25519, the current signing method used across the Stellar network, and the timeline for this phase will be synchronized with actual advancements in quantum computing capability.

The approach mirrors guidelines established by NIST’s post-quantum cryptography standards, which have been shaping how the broader tech and financial sectors think about cryptographic resilience.

Why this matters more than it sounds

The QPP decouples account identity from signing keys. Enterprise wallets can migrate to quantum-safe signing methods in 2026 without requiring any initial protocol changes for classic accounts. No address changes, no balance migrations.

The Bank for International Settlements has published its own roadmap addressing quantum readiness in financial systems, and Stellar’s QPP aligns with that broader institutional push.

The competitive landscape for quantum resistance

Ethereum has discussed quantum resistance at the research level, with Vitalik Buterin floating ideas about account abstraction as a potential migration path. Bitcoin’s community has generally argued that the threat is distant enough to not warrant immediate architectural changes. Neither has published anything as structured as Stellar’s three-stage roadmap.

Algorand has made noise about quantum-resistant features, and IOTA explored post-quantum signatures early in its development. But the specificity of Stellar’s timeline, with concrete stages mapped to 2026 and 2027, sets it apart from networks offering vague commitments.

Initial market reaction to the announcement was muted. Quantum preparedness is a long-term infrastructure play, not the kind of catalyst that sends tokens pumping on a Monday morning.