Guest Post: Quantum-Resistant Wallets Could Support Institutional Blockchain Adoption

Guest Post by Seb Audy | COO at AmericanFortress, COO at Moon Pursuit Capital

Institutional finance has a problem with how it approaches blockchain security. We are spending billions building systems intended to hold and move assets for decades, while much of the cryptography protecting those assets was designed without quantum computing in mind. For an industry that measures risk in basis points and spends enormous sums protecting against unlikely events, that inconsistency is odd.

I think quantum-resistant wallets could meaningfully affect institutional blockchain adoption because they address a question banks and asset managers will eventually have to answer: how comfortable are you holding billions in assets on infrastructure whose security assumptions may have an expiration date?

Nobody knows when a cryptographically relevant quantum computer will arrive. But a bank doesn’t evaluate infrastructure solely against the threats it faces this morning. It considers how that infrastructure will perform throughout its useful life, what replacing it might cost, and whether it can withstand foreseeable risks.

Consider a pension fund allocating capital to tokenized bonds or a custodian safeguarding digital assets for institutional clients. Some positions could remain in custody for decades. The institution responsible needs to know whether the mechanisms controlling ownership and authorization can be upgraded as cryptographic standards change.

That is the part most of the industry has underweighted. Nearly every proposed quantum fix asks holders to either rotate keys, migrate to new addresses, or follow a chain fork. For an active trader that is a chore. For a custodian holding positions that may not move for twenty years, or for assets whose owners are no longer reachable, it is a security model that fails precisely where institutions need it most. The infrastructure that wins this market will be the infrastructure that protects what is already there.

For years, crypto security discussions centered on exchange hacks, compromised private keys and smart contract vulnerabilities. Those risks remain, but quantum computing raises a more basic concern. A sufficiently capable quantum computer could break the elliptic-curve signatures used by many blockchain wallets. The mathematics that currently makes unauthorized signing impractical would no longer offer the same protection.

We don’t need to exaggerate how close that threat is to recognize the financial implications. Institutions are making infrastructure decisions today that may outlast their current cryptographic assumptions.

NIST’s post-quantum cryptographic standards, published in 2024, gave organizations a concrete starting point for planning. The commercial opportunity, in my view, lies in what happens when those standards influence procurement, custody requirements and the way institutions evaluate blockchain platforms.

I think about this through my work at AmericanFortress, where we are exploring how privacy-preserving cryptography and quantum-resistant security can fit into blockchain infrastructure. One area of interest is how zero-knowledge techniques might support more adaptable wallet architectures, particularly where institutions need stronger security guarantees without exposing sensitive information or rebuilding their existing workflows.

Building this at AmericanFortress has changed how I evaluate the quantum theme as an investor. At Moon Pursuit Capital, we look closely at where developments in frontier technology create opportunities beyond the obvious hardware story. Quantum computing is particularly interesting because some early commercial beneficiaries may be companies protecting existing systems against its eventual capabilities.

There is substantial investment flowing into quantum processors, understandably given their potential applications in research, modeling and optimization. But financial institutions have a reason to invest in cryptographic resilience before commercially useful quantum computers arrive. The difficulty is that upgrading blockchain security isn’t as simple as replacing an encryption library.

Wallets depend on how transactions are signed and verified. Custodians have established key-management procedures, and institutions have compliance obligations and integrations they cannot casually discard. Some post-quantum signature schemes also require larger keys and signatures, raising questions about transaction costs, storage and performance. A secure solution that makes custody prohibitively expensive or operationally unmanageable won’t see much adoption. This is why the approaches worth watching protect the keys institutions already hold rather than asking them to adopt a new signature scheme on-chain.

The technical distinctions matter. Zero-knowledge proofs are generally quantum-resistant, but adding them to a wallet does not automatically protect vulnerable digital signatures – that depends on the exact implementation. The challenge is designing systems in which cryptographic components, authorization mechanisms and upgrade paths work together securely. That requires more engineering than attaching a quantum-resistant label to a product.

Institutional buyers want to know whether technology reduces risk, what implementation costs, how it affects operations and whether they can rely on it over time. A wallet provider with a credible answer to migration path, ideally one that removes the need for it, plus independent audits and manageable integration costs has something valuable to sell.

The implications extend beyond wallets. Custody providers, settlement networks and tokenization platforms will all need to assess quantum exposure. Some will build internally; others will buy technology or work with specialists. That could create opportunities across key management, transaction authorization and software designed to support future security upgrades.

Importantly, demand need not wait for a quantum breakthrough. A change in institutional security requirements could generate spending years before the underlying threat becomes practical.

That doesn’t mean every company advertising post-quantum capabilities deserves a premium valuation. Investors should distinguish between credible engineering, independently tested implementations and speculative claims. Security products have to survive adversarial scrutiny, especially when financial assets are involved. Peer-reviewed cryptography in the open, a patent portfolio that describes the method rather than the marketing, and independent audit before institutional deployment are the minimum.

I’m optimistic because tokenization offers institutions genuine economic advantages in settlement and asset administration. Making that infrastructure resilient to future cryptographic threats strengthens the case for using it at scale. Wall Street has never required technology to be free of risk; it requires risks to be understood, managed and priced. Quantum-resistant wallets could help meet that standard.

For investors, the interesting question isn’t exactly when quantum computers might break today’s cryptography. It’s which companies’ institutions will trust, and pay, to prepare them before that happens.

Guest posts reflect the views and opinions of their authors and do not necessarily represent those of The Quantum Insider, its staff or its affiliated organizations. Publication does not constitute an endorsement of any company, product, service or claim discussed.