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A comment on Sweden’s central bank says it has begun testing an e-krona. Parent comment

Re:Sweden’s central bank says it has begun testing an e-krona by darawk on Thursday February 20, 2020 @01:26PM (#22377280)
But they are the most efficient known solution to the problem. Efficiency is relative.
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Re:Sweden’s central bank says it has begun testing an e-krona by tadfisher on Thursday February 20, 2020 @04:35PM (#22378876)
No, they are the most efficient known solution to global consensus for double-spend. There are alternatives that relax the constraints using extra information such as connections in the network to get a relatively good approximation of the global consensus. See Safecoin, for example.
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