Quantum Computers Will Supercharge the World But the National Security Threat Is Already Here

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The New York Post published a piece this week that deserves more attention than it's getting outside specialist circles. The headline sounds like standard tech hype but the substance is genuinely alarming. John Preskill, Caltech's Director of the Institute for Quantum Information and the physicist who actually coined the term quantum computing, told the Post plainly: the encrypted security systems we use every time we send a credit card number over the internet or connect to a website will no longer be secure when quantum computers are sufficiently capable. That's not a fringe view. That's the field's founding figure on the record.

The timing of the article matters. President Trump signed two executive orders on June 22 directing urgent federal attention to quantum computing. The first orders the construction of the first quantum computer powerful enough for scientific research within two years. The second directs all federal agencies to transition to quantum-safe cryptography. Trump was surrounded by tech leaders including the presidents of Google and IBM when he signed them. He called it a big step forward. Whether you trust the timelines or not the political signal is real. The White House is treating quantum as urgent.

Google has separately stated that Q-Day, the moment when quantum computers can crack general encryption, could arrive as soon as 2029. That's three years away. Their own research showed earlier this year that a quantum computer with fewer than one million qubits could break RSA-2048 encryption in under a week, a dramatic reduction from previous estimates of 20 million qubits. The algorithmic improvements alone compressed the timeline. Hardware hasn't even caught up yet and the threat already moved closer.

China and Russia have been explicit about their quantum ambitions. China has invested approximately 15 billion dollars in public quantum funding and already operates the world's largest quantum key distribution network. They launched quantum satellites in 2016 and 2022 with a third planned for this year. Russia is investing heavily in parallel. Neither nation is doing this for scientific curiosity. The military and intelligence implications drive the investment.

The threat that most experts consider most urgent right now isn't Q-Day itself. It's what's already happening in preparation for it. The strategy is called harvest now decrypt later. Adversaries are intercepting and storing encrypted communications today, government data, military intelligence, financial transactions, personal records, with the explicit intention of decrypting them when quantum capability arrives. The data being harvested now becomes readable later. This isn't theoretical. Experts at the Vanderbilt Quantum Forum in April stated plainly that this is already underway. The risk is not future facing. It is happening now.

This creates a specific and uncomfortable reality. Even if Q-Day doesn't arrive until 2035 or 2040, data being transmitted today that should remain sensitive for decades is already compromised in the sense that adversaries likely have copies waiting for the decryption key that quantum provides. Government records. Industrial secrets. Healthcare information. Long-lived sensitive data that was encrypted to last twenty years may not last ten.

The transition to post-quantum cryptography is underway but moving slowly. NIST published final standards in 2022. Federal agencies have mandates. But the infrastructure to actually implement quantum-safe encryption across government and enterprise systems is enormous. Legacy systems never designed for modern cybersecurity let alone quantum resilience are embedded everywhere. Replacing them without disrupting operations is not straightforward. Experts suggest the full transition could take more than a decade meaning the race against Q-Day is also a race against the transition timeline.

For ordinary people this feels abstract. Encryption is invisible infrastructure. It works until it doesn't. The moment it stops working the consequences are immediate and everywhere. Banking. Identity verification. Secure communications. Government services. Medical records. All of it depends on the assumption that RSA encryption is computationally unbreakable. That assumption has an expiry date that may be closer than anyone is comfortable admitting publicly.

Trump's executive orders are the clearest signal yet that the US government considers the timeline real and urgent. The order to build a quantum-capable supercomputer within two years, with Google and IBM leadership present at the signing, suggests the administration has been briefed on timelines that create genuine alarm. Policy follows intelligence. When a government moves this fast on a technology that has been decades in the making the question worth asking is what they know that they're not saying publicly.

Quantum computers will supercharge the world - but they present serious national security risksnypost.com

Trump signs executive orders to 'supercharge' quantum computingabcnews.com