Google's new whitepaper says it could take only minutes for a quantum system to crack Bitcoin.

A team of Google researchers just set a new date for post-quantum cryptography migration: 2029. Among other things, this means that Bitcoin, as well as many other cryptocurrencies, needs to adopt new cryptographic techniques that are resilient to quantum attacks within three years.

Google just issued a 2029 deadline to encrypt its systems against quantum computers. Bitcoin may not have the same luxury of time.

What all this means for bitcoin is fascinating. The Google researchers went into great depth (the paper is 57 pages) to show how an attacker armed with a quantum computer could invade bitcoin's network,