Anchorage Digital, the first federally chartered digital-asset bank in the United States, has laid out a detailed post-quantum compute (PQC) preparedness strategy, saying its custody stack, transport layer, and hardware security modules already deploy quantum-resistant defenses in production. The disclosure, published July 29, 2026, positions the San Francisco company as one of the most forward-leaning U.S. financial infrastructure firms on quantum risk to digital assets.
Why It Matters
Public-key digital signatures — not proof-of-work mining — are the specific quantum vulnerability for cryptocurrencies. Shor's algorithm, once run on a cryptographically relevant quantum computer, could derive private keys from exposed public keys, placing large swaths of the addressable Bitcoin and Ethereum supply at risk. Google's Qubits Research team recently flagged 2029 as an industry timestamp to watch. Anchorage argues the "harvest now, decrypt later" threat means the risk model is present-tense, not future-tense.
What Anchorage Has Deployed
The company said it already runs hash-based Bitcoin address conventions that keep public keys off-chain and quantum-safe at rest, quantum-resistant TLS across its internal systems and workforce ChromeOS fleet, and an HSM-based cryptographic-agility architecture that lets it swap in NIST post-quantum algorithms without rebuilding downstream systems. Anchorage said it is benchmarking all four NIST-finalized post-quantum signature algorithms in production and is designing new HSM hardware for the migration.
Original Research: Turnstile and SQIsign
Anchorage's security engineering team published the Post-Quantum Turnstile, a STARK-based zero-knowledge scheme that allows holders of legacy credentials to transition signing authority to post-quantum keys without ever exposing their private material. The paper argues Turnstile could safeguard roughly two-thirds of circulating Bitcoin supply that would otherwise be permanently frozen once classical signing paths are disabled. Separately, the firm open-sourced sqisign-rs, a Rust implementation of the SQIsign isogeny-based signature scheme — a candidate in NIST's additional-signatures round whose signatures are roughly 7x smaller than Falcon, a meaningful advantage for blockchain footprint.
Context: A Widening PQC Race
Anchorage's disclosure lands alongside a broader wave of post-quantum activity in the semiconductor and identity stack. SEALSQ and GlobalFoundries signed a post-quantum silicon MoU last month, while Keyfactor closed a $1B+ Summit Partners investment to accelerate post-quantum machine identity. Anchorage said it is collaborating with core protocol teams, academic institutions, and standards bodies as post-quantum blockchain architectures firm up.
Nathan McCauley, Anchorage's co-founder and chief executive, framed the disclosure as an ongoing migration rather than a headline milestone: "Quantum isn't a moment, it's a migration. And at Anchorage Digital, we've been building for that migration since day one." Related: SEALSQ, GlobalFoundries sign post-quantum chip MoU. Related: BTQ closes QPerfect deal for quantum emulation stack.
Reporting based on coverage from Anchorage Digital, Quantum Computing Report, and Disruption Banking.