Starknet Completes Quantum-Resistant Signature Transfer Test on Mainnet

Tel Aviv, August 7, 2026. Starknet has successfully completed a quantum-resistant signature transfer test on mainnet, marking the first Layer 2 protocol to validate post-quantum cryptographic signatures in a live production environment. The milestone addresses the long-term threat quantum computing poses to elliptic curve cryptography standards currently underpinning blockchain infrastructure.

The test validates Starknet's ability to transition users and assets to quantum-safe cryptographic schemes without disrupting existing infrastructure. Current blockchain protocols rely on ECDSA and EdDSA signature schemes, which cryptographically relevant quantum computers (CRQCs) could theoretically break. While industry consensus places that threshold 10 to 20 years away, NIST finalized its post-quantum cryptography standards in August 2022, and institutional investors have increasingly flagged quantum resilience as a long-term infrastructure requirement.

The implementation builds on Starknet's ZK-STARK cryptographic foundation, which carries inherent quantum-resistance advantages over the SNARK-based approaches used by competing Layer 2s including Arbitrum, Optimism, and Polygon zkEVM. Three independent security audits from OpenZeppelin, Trail of Bits, and Certora were completed prior to the mainnet test. None of Starknet's primary competitors have announced comparable mainnet quantum-resistant signature tests.

The quantum-resistant test follows Starknet's Phase 4 Shinobi upgrade, deployed in May 2026, which introduced native privacy features and Bitcoin interoperability. Since that upgrade, the protocol's total value locked has reached $180 to $220 million, representing 3.2x growth since the Phase 3 launch in Q4 2025. Daily transaction volume runs between $280 million and $350 million, with network throughput reaching 4,000 to 6,000 transactions per second.

Starknet's April 2026 partnership with Securitize, which brought institutional securities onchain, demonstrated that regulated financial participants are actively evaluating Layer 2 security architecture as a deployment criterion. The global blockchain security audit market reached $2.1 billion in 2025, reflecting growing institutional scrutiny of protocol-level security.

The quantum-resistant signature implementation is available for developer testing on Starknet's public testnet. Full mainnet deployment for user accounts is expected to follow a staged rollout with automated key rotation mechanisms designed to minimize migration friction.

About Starknet

Starknet is a Cairo-based Layer 2 scaling protocol built on Ethereum, leveraging zero-knowledge proofs (ZK-STARKs) to achieve high throughput while inheriting Ethereum's security guarantees. Launched on mainnet in November 2021 and developed by StarkWare, the protocol has evolved through four major upgrade phases, most recently the Phase 4 Shinobi upgrade in May 2026, which added native privacy and Bitcoin interoperability. Starknet currently processes 4,000 to 6,000 transactions per second, holds $180 to $220 million in total value locked, and supports daily transaction volumes of $280 to $350 million. The protocol has completed three independent security audits from OpenZeppelin, Trail of Bits, and Certora.