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(These techniques are very powerful. Not only can I change the constraints I’m proving on demand, but I can also perform proofs that reference multiple different credentials at the same time. For example, I might prove that I have a driver’s license, and also that by digitally-signed credit report indicates that I have a credit rating over 700.)
She was initially told there were "no viable lines of enquiry," but the case was referred to Merseyside Police after the agency was contacted by the BBC.