Ars Technica reported,
Yes, a single-core PC took only 1 hour to break the supposedly quantum-proof cryptographic algorithm!
In the US government's ongoing campaign to protect data in the age of quantum computers, a new and powerful attack that used a single traditional computer to completely break a fourth-round candidate highlights the risks involved in standardizing the next generation of encryption algorithms.
Yes, a single-core PC took only 1 hour to break the supposedly quantum-proof cryptographic algorithm!