Craig Wright's claim to be bitcoin founder labelled a 'scam'

Security researchers cast doubt on the announcement that the Australian is the true identity behind cryptocurrency's creator, Satoshi Nakamoto

The Australian computer scientist Craig Wright's claim to be the bitcoin creator, Satoshi Nakamoto, has been called into doubt by the discovery of a discrepancy in a central piece of his evidence.

The digital signature used to back up Wright's claim was first uploaded to the internet seven years ago, something security researchers say means it cannot be used to prove his identity.