StarkWare Outlines Three-Phase Security Transition As Industry Prepares For Post-Quantum Era

Software company StarkWare has published a roadmap outlining how its Layer 2 blockchain, Starknet, plans to transition toward post-quantum (PQ) security, arguing that advances in quantum computing have shifted the issue from a long-term possibility to an emerging infrastructure priority. The company said governments, technology firms, and standards organizations are increasingly issuing guidance on post-quantum cryptography, making migration planning an important consideration for blockchain networks and other digital infrastructure.

According to StarkWare, Starknet’s existing architecture provides an advantage over many other blockchain networks because its proving system is built on STARK cryptographic proofs, which rely on collision-resistant hash functions rather than elliptic-curve cryptography. Since quantum computers are expected to threaten elliptic-curve-based systems through algorithms such as Shor’s algorithm, the company argues that Starknet requires fewer structural changes to achieve quantum resistance.

The roadmap also highlights Starknet’s native account abstraction, which enables developers and users to adopt post-quantum signature schemes without requiring disruptive protocol-level upgrades. StarkWare said users can already deploy quantum-resistant wallets on the network, while ecosystem contributors, including OpenZeppelin and S2morrow, are developing additional post-quantum account implementations.

Three-Phase Migration Strategy Targets Quantum-Resistant Infrastructure

The migration strategy is divided into three phases. The first phase focuses on protecting all newly created activity on the network by replacing Pedersen hashing, which relies on elliptic-curve assumptions, with the BLAKE2 hash function across key components of the protocol. The transition covers state commitments, contract address generation, and operating system configuration. StarkWare expects most of these upgrades to be completed within approximately two months, while the operating system configuration update is scheduled for deployment on the main network in early July.

The second phase targets existing smart contracts by extending post-quantum protections to legacy deployments. The company plans to introduce improved development tools and a migration toolkit designed to help developers upgrade existing contracts without requiring manual data transfers or disrupting deployed applications. StarkWare estimates that its own infrastructure work for this phase could be completed about one month after Phase 1, although migration timelines for decentralized applications will depend on individual development teams.

The final phase depends on Ethereum’s own post-quantum migration. Because Starknet relies on Ethereum for bridge messaging and data availability, several remaining components cannot be fully upgraded until Ethereum replaces cryptographic mechanisms that currently depend on elliptic-curve technology. StarkWare said these external dependencies will be addressed as Ethereum progresses with its own roadmap.

The company stated that completing the migration would position Starknet as a production blockchain operating almost entirely on post-quantum cryptographic primitives while minimizing the complexity typically associated with large-scale blockchain upgrades. StarkWare added that it will continue monitoring developments in quantum computing and Ethereum’s migration while publishing further technical updates as implementation progresses.

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