Quantum computers could crack today's encrypted messages. That's a problem

Google plans to make million-qubit quantum computers by 2029 that are much more powerful than this system it showed in 2019. Quantum computers, if they mature enough, will be able to crack much of today's encryption. That'll lay bare private communications, company data and military secrets. Today's quantum computers are far too primitive to do so. But data surreptitiously gathered now could still be sensitive when more powerful quantum computers come online in a few years.