Google has issued what might be the tech industry's most consequential deadline: migrate to post-quantum cryptography by 2029, or risk having your encryption infrastructure rendered obsolete by quantum computers.

This isn't speculative futurism. This is Google — the company actually building quantum computers — saying the clock is ticking on the security systems protecting everything from banking transactions to healthcare records to state secrets.

The warning comes from Google's security research team, which has been tracking quantum computing progress alongside the company's quantum AI division. Their assessment: quantum computers capable of breaking current RSA and elliptic curve cryptography could arrive as early as 2029. Maybe 2032 if we're lucky. But not much later than that.

"Harvest now, decrypt later" is already happening

Here's the terrifying part that most people miss: adversaries don't need to wait until 2029 to benefit from quantum computers. They're already harvesting encrypted data right now, storing it, and waiting for quantum computers powerful enough to decrypt it.

If you're transmitting sensitive data today that needs to stay confidential for the next decade — medical records, financial information, trade secrets, classified communications — it's already at risk. The quantum computer that will break it might not exist yet, but the data collection is happening in real time.

Google's quantum researchers point out that this "harvest now, decrypt later" strategy makes the 2029 deadline even more urgent. By the time quantum computers can break today's encryption, the data that matters will have already been collected.

The migration challenge

Moving to post-quantum cryptography isn't like updating an app. It's replacing the foundational security layer of digital infrastructure — systems that were designed assuming current encryption would remain secure indefinitely.

The National Institute of Standards and Technology (NIST) has already standardized post-quantum cryptographic algorithms, including CRYSTALS-Kyber for key exchange and CRYSTALS-Dilithium for digital signatures. These algorithms are designed to resist attacks from both classical and quantum computers.