Ethereum co-founder Vitalik Buterin says a goal of one of the blockchain’s roadmap stages is to research “advanced cryptography” to make it resistant to future quantum computers, which could break encryption. “There is a heck of a lot left to do,” Buterin wrote in an Oct. 29 blog post, which shared his thoughts on a part of the blockchain’s roadmap dubbed “The Splurge.” However, he said that quantum computers — which would be powerful enough to break encryption — “do not even exist.” Buterin added any purported quantum computer currently touted on the internet “are either prototypes” or are ju…