# Toncoin (TON) Quantum Readiness Report

> Toncoin has a QRI score of 12.7/100 and is assessed at Stage 1 (Quantum Risk Assessed) with medium evidence confidence.

Evaluation date: 2026-06-01. Review status: draft. Evaluated scope: Native asset (TON) on TON mainnet L1, including base-layer spend authorization, consensus, state integrity, P2P, and wallet infrastructure as of 2026-06-01..

Toncoin (TON) is a PoS smart-contract platform that relies entirely on Ed25519 elliptic-curve cryptography for all wallet transaction signatures, validator consensus signatures, and P2P node identity. Public keys are exposed on-chain for every wallet that has ever sent a transaction, creating a massive long-exposure attack surface vulnerable to 'harvest now, decrypt later' quantum attacks via Shor's algorithm. The TON Foundation has not published a quantum risk assessment, PQC migration roadmap, prototype, testnet, or mainnet path. TON's state-integrity layer uses hash-based Merkle proofs (SHA-256) which provides adequate quantum-resistant collision resistance, but this does not protect against the primary quantum attack vector: private key recovery from exposed Ed25519 public keys. TON's architecture (wallet-as-smart-contract, upgradeable system contracts, workchain model) provides genuine structural flexibility for future PQC adoption, but these are architectural properties, not deployed protection. The QRI Score of 13/100 reflects Stage 1 (Quantum Risk Assessed) status: the cryptographic inventory is publicly documented and the quantum risk can be assessed from available evidence, but there is zero production quantum protection across all critical layers.

## Core resources

- [Toncoin QRI report](https://qrindex.org/projects/toncoin/): Human-readable assessment with score, stage, evidence, blockers, risks, and assurance notes.
- [Toncoin structured report data](https://qrindex.org/projects/toncoin/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.
- [Toncoin official website](https://ton.org): Project-maintained website.
- [Toncoin source repository 1](https://github.com/ton-blockchain/ton): Project source code referenced by QRI.



## Evidence sources

- [Evidence source 1](<https://docs.ton.org/blockchain-basics/contract-dev/techniques/signing>): Public source cited by the Toncoin QRI assessment.
- [Evidence source 2](<https://docs.ton.org/develop/smart-contracts/guidelines/ed25519>): Public source cited by the Toncoin QRI assessment.
- [Evidence source 3](<https://github.com/ton-blockchain/ton>): Public source cited by the Toncoin QRI assessment.
- [Evidence source 4](<https://www.binance.com/en/square/post/12184000000000>): Public source cited by the Toncoin QRI assessment.
- [Evidence source 5](<https://bmic.ai/research/toncoin-quantum-vulnerability>): Public source cited by the Toncoin QRI assessment.
- [Evidence source 6](<https://docs.ton.org/blockchain-basics/whitepapers/catchain>): Public source cited by the Toncoin QRI assessment.
- [Evidence source 7](<https://medium.com/@ducphamle212/verifying-tons-masterchain-blocks-part-2-ton-hack-series-38a88a845918>): Public source cited by the Toncoin QRI assessment.
- [Evidence source 8](<https://docs.ton.org/blockchain-basics/primitives/proofs/overview>): Public source cited by the Toncoin QRI assessment.
- [Evidence source 9](<https://docs.ton.org/blockchain-basics/whitepapers/tblkch>): Public source cited by the Toncoin QRI assessment.
- [Evidence source 10](<https://docs.ton.org>): Public source cited by the Toncoin QRI assessment.
- [Evidence source 11](<https://ton.app/journal/guide/how-quantum-technologies-threaten-cryptocurrencies-and-is-ton-ready-for-them>): Public source cited by the Toncoin QRI assessment.
- [Evidence source 12](<https://docs.ton.org/v3/concepts/security-measures>): Public source cited by the Toncoin QRI assessment.
- [Evidence source 13](<https://ton.org/roadmap>): Public source cited by the Toncoin QRI assessment.
- [Evidence source 14](<https://www.certik.com/ecosystems/ton>): Public source cited by the Toncoin QRI assessment.
- [Evidence source 15](<https://hashex.org/chains/ton/>): Public source cited by the Toncoin QRI assessment.