The Asymmetric Attack Surface of Fiat Substitutes: A Measurement Framework and Owner-Bound Offline Custody Architecture (OpenAlex (recherche mondiale))

Summary

• In 2019, Federal Bureau of Investigation data recorded USD 1.424 billion in reported stolen currency and USD 36.981 million recovered relative to USD 1.7598 trillion of U.S. currency in circulation.p.1
• The U.S. cash gross reported loss intensity in 2019 was 0.0809% with a reported recovery share of 2.60%.p.1
• Binance breach reports estimate approximately USD 6.30–6.43 billion stolen in October 2026.p.1
• Identified cryptocurrency hacks in 2024 accounted for approximately USD 2.2 billion according to both Chainalysis and TRM Labs.p.1
• FBI Table 24 reports covered 14,165 agencies and an estimated population of 285,731,352 in 2019.p.8
• The FBI 2024 Internet Crime Complaint Center report recorded 859,532 complaints representing USD 16.6 billion in reported losses.p.10

Key insights

1. Distinguishing attack topology from realized loss is essential because a broad attack surface can coexist with low observed loss when controls are effective.p.3
2. Relative-vulnerability comparisons between physical cash and digital fiat substitutes remain conditional estimands due to unmatched public data sources.p.1
3. Reusable exploit logic in network attacks allows fixed development costs to be amortized across multiple targets, lowering the marginal cost of subsequent attacks.p.4
4. Standard probability-only deterrence ratios fail to serve as complete deterrence measures without matched physical and digital offense cohorts.p.5
5. The proposed owner-bound custody architecture requires that no complete spend key exists on the physical substrate or in manufacturing logs.p.11
6. Value partitioning decreases variance of loss when component failures are uncorrelated, but provides no variance benefit if pairwise correlation equals 1.p.14
7. Air-gapping via optical channels does not guarantee complete isolation because decoders, cameras, displays, and firmware remain vulnerable to exploits.p.14
8. TRM Labs classified nearly 70% of 2024 cryptocurrency hack losses as infrastructure attacks, primarily private-key and seed-phrase compromises.p.9