Who was the guy and what was the flawed and retracted paper mentioned in the below quote from Schneier's article? >In email, Roger Grimes told me: “Apparently

Who was the guy and what was the flawed and retracted paper mentioned in the below quote from Schneier's article? >In email, Roger Grimes told me: “Apparently what happened is another guy who had previously announced he was able to break traditional asymmetric encryption using classical computers…but reviewers found a flaw in his algorithm and that guy had to retract his paper.