# Nervos Network (CKB) Quantum Readiness Report

> Nervos Network has a QRI score of 52.65/100 and is assessed at Stage 3 (Migration Live) with medium evidence confidence.

Evaluation date: 2026-06-01. Review status: draft. Evaluated scope: CKB Layer 1 native asset and base protocol.

Nervos CKB demonstrates strong cryptographic agility through its RISC-V based CKB-VM, enabling deployment of a NIST-standardized SPHINCS+ (FIPS 205) lock script on mainnet without a hard fork. The SPHINCS+ implementation is open-source, audited by ScaleBit, and supported by a community desktop wallet (Quantum Purse). However, quantum protection is strictly opt-in: the default lock script remains secp256k1 (ECC-only), users can still create new quantum-vulnerable accounts by default, and no migration enforcement, deprecation, or freeze mechanism exists. The vast majority of CKB value-at-risk almost certainly remains in classical secp256k1-locked cells. The P2P networking layer (Tentacle/Secio) relies on ECDH and secp256k1 ECDSA. PoW consensus with Eaglesong hash avoids validator-signature risk. Godwoken L2 and Force Bridge have been shut down, removing bridge-related quantum exposure. Overall QRI Score of 53 reflects optional mainnet PQ protection with vulnerable defaults and major quantum-critical gaps.

## Core resources

- [Nervos Network QRI report](https://qrindex.org/projects/nervos-network/): Human-readable assessment with score, stage, evidence, blockers, risks, and assurance notes.
- [Nervos Network structured report data](https://qrindex.org/projects/nervos-network/report.json): Complete report as JSON for deterministic machine processing.
- [QRI methodology](https://qrindex.org/methodology/): Scoring model, evidence handling, readiness stages, confidence, assurance, and report status.
- [All QRI project reports](https://qrindex.org/llms.txt): Score-ranked index of every published project assessment.
- [Nervos Network official website](https://www.nervos.org): Project-maintained website.
- [Nervos Network source repository 1](https://github.com/nervosnetwork/ckb): Project source code referenced by QRI.



## Evidence sources

- [Evidence source 1](<https://docs.nervos.org/docs/ckb-features/native-quantum-resistance>): Public source cited by the Nervos Network QRI assessment.
- [Evidence source 2](<https://github.com/nervosnetwork/rfcs/blob/master/rfcs/0002-ckb/0002-ckb.md>): Public source cited by the Nervos Network QRI assessment.
- [Evidence source 3](<https://docs.nervos.org/docs/ecosystem-scripts/secp256k1_blake160_sighash_all>): Public source cited by the Nervos Network QRI assessment.
- [Evidence source 4](<https://github.com/nervosnetwork/quantum-resistant-lock-script>): Public source cited by the Nervos Network QRI assessment.
- [Evidence source 5](<https://github.com/nervosnetwork/rfcs>): Public source cited by the Nervos Network QRI assessment.
- [Evidence source 6](<https://leastauthority.com/static/publications/LeastAuthority-Nervos-Network-Audit-Report.pdf>): Public source cited by the Nervos Network QRI assessment.
- [Evidence source 7](<https://docs.nervos.org/docs/ckb-fundamentals/ckb-address>): Public source cited by the Nervos Network QRI assessment.
- [Evidence source 8](<https://docs.nervos.org/docs/basics/concepts/consensus>): Public source cited by the Nervos Network QRI assessment.
- [Evidence source 9](<https://blog.cryptape.com/tentacle-the-network-layer-of-ckb>): Public source cited by the Nervos Network QRI assessment.
- [Evidence source 10](<https://github.com/nervosnetwork/tentacle/blob/master/docs/introduction_en.md>): Public source cited by the Nervos Network QRI assessment.
- [Evidence source 11](<https://chainwire.org/2026/02/02/nervos-ckb-adapts-with-post-quantum-protection-via-sphincs/>): Public source cited by the Nervos Network QRI assessment.
- [Evidence source 12](<https://www.quantumpurse.org/>): Public source cited by the Nervos Network QRI assessment.
- [Evidence source 13](<https://github.com/cryptape/quantum-resistant-lock-script>): Public source cited by the Nervos Network QRI assessment.