⚠ NOTE: BIP-360, XRPL, and Ethereum PQC roadmaps are evolving — verify current status at BIP tracker and respective chain governance forums before citing outputs.

ART-89 · Wave 18 · Post-Quantum Cryptography · Blockchain Risk

Blockchain / Stablecoin Quantum-Risk Classifier

Classifies quantum-exposure risk for blockchain/stablecoin assets: exposed public-key percentage, address reuse, and migration-path maturity. References BIP-360 (Bitcoin), XRPL and Ethereum quantum roadmaps. Part of the pqc-blockchain-risk chain.

BIP-360 · Ethereum · XRPL Exposed pubkey tiering Citi Digital Assets Research

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Chain Configuration

Current signature scheme

Migration roadmap

Exposed public-key addresses (%)addresses where pubkey is on-chain

Address reuse (%)addresses used more than once

Asset

Asset type

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Exposed Keys %

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Reuse Risk

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Migration

Chain Details

Signature scheme	–
Asset type	–
Migration roadmap	–
Exposure thresholds (high / medium)	≥25% = high · ≥10% = medium Citi Digital Assets Research May 2026 — verify current

Roadmap References

Quantum migration references for this scheme

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Flags

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⚠ Milestone note: verify BIP-360, XRPL, and Ethereum roadmap status against current sources. Exposure thresholds derived from Citi Digital Assets Research (May 2026) analysis approach — verify current publication.

References: Citi Digital Assets Research (May 2026) · Bitcoin BIP-360 (verify current BIP status) · XRPL quantum roadmap discussions · Ethereum EIP tracker. DECISION-SUPPORT DRAFT — not a risk certification.

OpenChainGraph v0.4 artifact · execution_hash:

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