StarkWare has released a multi-phase post-quantum (PQ) cryptographic roadmap for the Starknet Layer-2 network to transition its core primitives away from quantum-vulnerable assumptions. Because Starknet’s fundamental STARK proof system relies on collision-resistant hash functions rather than elliptic-curve cryptography (ECC) arithmetic, its underlying proving layer is natively insulated from the specific quantum vulnerabilities that affect the settlement infrastructures of alternative blockchain networks. Furthermore, Starknet utilizes native account abstraction, which enables the implementation of quantum-resistant signature schemes at the contract layer without necessitating breaking protocol changes at the core consensus layer.
The engineering strategy is split into discrete implementation blocks to systematically secure distinct network surfaces. Phase 1 targets new on-chain activity by replacing Pedersen hashing—which inherits elliptic-curve assumptions—with BLAKE2 across the state commitment trie, contract address derivation, and operating system (OS) configuration hash layers. The OS configuration hash update is scheduled for mainnet deployment in early July 2026, alongside the upcoming integration of Falcon-512 post-quantum signature options into account contracts currently being developed by OpenZeppelin. Phase 2 extends quantum resistance to existing on-chain deployments, introducing automated native migration toolkits that allow developers to upgrade legacy storage slot key derivations without manual data migration or contract interface disruptions.
Phase 3 addresses external infrastructure vectors that are directly dependent on Ethereum’s independent post-quantum migration timeline. Starknet’s L1-to-L2 bridge messaging framework relies on quantum-vulnerable secp256k1/r1 system calls, while its state-diff data availability layer utilizes elliptic-curve-based KZG commitments inside EIP-4844 blobs. The removal of these specific syscalls and the optimization of blob commitments will be executed conditionally following Ethereum’s upstream cryptographic upgrades to ensure cross-chain messaging and data availability transparency remain unbroken.
The complete post-quantum cryptographic roadmap, implementation phases, and architectural specifications can be reviewed in the official StarkWare technical report here.
June 30, 2026
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