“The financial system’s most dangerous vulnerability isn’t stored data, it’s the data moving between institutions right now. Every interbank message, every payment authentication record, and every digital signature traveling across a network today is being collected by sophisticated adversaries who don’t need to read it yet.”
Gault’s warning centers on a strategy security researchers call “harvest now, decrypt later.” The idea is that an attacker does not need a working quantum computer today to benefit from one tomorrow. Encrypted traffic can be copied and stored cheaply now, then decrypted years later once a sufficiently powerful machine exists.
That reframes the quantum threat from a future event into a present-day data-collection problem. Post-quantum cryptography (encryption designed to withstand quantum attacks) only protects information going forward. Anything captured before the upgrade remains exposed to retroactive decryption, which is why Gault and others argue the clock is already running.
Why the Proof Layer MattersThe data being harvested is not just sensitive but foundational, Gault believes. He described the authentication records moving across networks as “the proof layer that determines who owns what, who authorized which transaction, and who bears legal liability.”
And, while developers have grown more vocal after years of relative silence, the prevailing approach still favors voluntary transitions and waiting for mature standards rather than a forced protocol change, a posture that Gault’s comments implicitly challenge.
Securing Data In TransitZerotier is not a neutral bystander in the debate as the firm recently launched Zerotier Quantum, a networking platform built to meet the U.S. government’s highest cryptographic benchmarks, including standards set by the National Institute of Standards and Technology (NIST). Gault’s framing naturally favors securing data in transit, the problem his product addresses.
