Early July 2026 marks the first mainnet step in StarkWare’s post-quantum roadmap: Starknet will update its OS configuration hash and begin replacing Pedersen hashing with BLAKE2 in key network components.
That first phase targets new on-chain activity, covering the state commitment trie, contract address derivation and OS configuration, while OpenZeppelin develops Falcon-512 signature options for Starknet account contracts.
Phase 2 moves to legacy deployments, adding native migration tools so developers can upgrade old storage-slot key derivations without manual data transfers or breaking contract interfaces.
Phase 3 depends on Ethereum’s own cryptographic upgrades because Starknet’s bridge messaging still uses secp256k1/r1 calls and its data-availability layer relies on elliptic-curve KZG commitments in EIP-4844 blobs.
StarkWare said Starknet starts from a stronger base than many chains because its STARK proving system already avoids elliptic-curve arithmetic and its account abstraction lets quantum-resistant signatures be added without core consensus changes.
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Starknet’s Quantum-Safe Roadmap: Phase 1 Rollout, User Impact, and Industry Implications in 2026
Overview
StarkWare has launched a three-phase roadmap to make Starknet quantum-safe, aiming for every layer of the network to use post-quantum cryptography. This move comes as quantum migration shifts from a theoretical issue to a real need for developers and institutions. With Phase 1 rolling out in early July 2026, Starknet is upgrading its core protocols to strengthen security and position itself as a future-proof leader. The final phase will address external dependencies like Ethereum bridges, but its timing depends on Ethereum’s own quantum transition, highlighting the interconnected nature of blockchain security.