The tipoff warns: based on the latest developments, the premature advent of quantum attacks may not be dramatic or even traceable.
A quantum industry insider has warned that, when cybercriminals begin to tap quantum computing for attacks, there may not be dramatic, headline-grabbing thefts, but rather, a series of subtle, unexplained wallet compromises that leave investigators without any clear forensic evidence.
That is the warning from Christopher Smith, founder and CEO, Quantus Network, in an industry interview. A sufficiently advanced quantum system could calculate private keys directly from public keys that are already visible on the blockchain. In such a scenario, attackers would not need to breach exchanges, wallets, or user devices to access funds.
Instead, they could simply derive the necessary cryptographic credentials and transfer assets at will. Victims would not receive any indication of how their keys had been compromised, and in cases involving well-secured organizations, the absence of any detectable intrusion could itself be the only evidence that an attack had occurred.
Smith estimated that there is an even chance — roughly 50-50 — that quantum computers could defeat current public-key cryptographic systems before 2028, citing rapid progress driven in part by AI-enhanced algorithmic development. He also pointed to the minting key used by Tether as a potentially valuable objective, since compromising it could allow an attacker to generate new tokens and liquidate them before detection. Such incidents, if they occur, could easily be misinterpreted as routine security failures, such as misplaced keys, further delaying recognition of a quantum-driven breach.
Preempting underestimations of elliptic curve cryptography
Concerns about the early advent of quantum attacks have intensified following Google’s announcement in March 2026 that it would accelerate its transition to post-quantum cryptography, moving its target timeline up to 2029. The decision had arrived after an AI-assisted research breakthrough suggested that elliptic curve cryptography could be broken using significantly fewer physical qubits than earlier projections had indicated.
Additional context underscores the scale of the potential risk: A Forbes report published in early August 2026 cited estimates that around 7m Bitcoin (worth about US$470bn) are held in addresses where public keys have already been exposed. The industry has begun transitioning towards quantum-resistant signature schemes, and failure in any sub-sector to do so would leave the ecosystem vulnerable to severe and widespread damage.
