Sonic Outlines Quantum-Resistant Upgrade Path

ChainCatcher report: Sonic details its technological roadmap for the "post-quantum era," noting that most current PoS blockchains rely on elliptic curve signatures (such as ECDSA and Ed25519), which are vulnerable to being broken once quantum computing—such as Shor’s algorithm—becomes mature. Sonic observes that the industry is exploring post-quantum cryptographic solutions, including hash-based schemes like XMSS and SPHINCS+, and lattice-based schemes like Dilithium and Falcon. However, mainstream consensus mechanisms commonly depend on BLS aggregate signatures and threshold signatures, making migration to post-quantum systems challenging due to performance, bandwidth, and architectural redesign requirements. In contrast, Sonic’s SonicCS consensus protocol does not rely on aggregate signatures or global randomness; instead, it constructs a DAG structure using only individual node signatures and hash functions. Therefore, when transitioning to post-quantum cryptography, only the signature algorithm needs to be replaced, without requiring changes to the consensus logic or network architecture. Sonic emphasizes that this design significantly reduces the complexity of migrating to post-quantum security in the future, enabling the network to better adapt when quantum computing threats emerge.