| http://www.w3.org/ns/prov#value | - The electronic coin of claim 40 wherein said certified linkage has the form C.tbd.f(Pi, u, 0.sup.γ)d$ mod N$ whereC indicates a certified linkage u=??r mod p, where a and p are publically known numbers and r is a random number chosen by the user i, 0.sup.?? indicates a run of ?? zeros, and d$ is a secret RSA exponent of a bank. 42.
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