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Материалы по теме:。Safew下载对此有专业解读
The User and Issuer now run the blind signing protocol described above — here the User sets its message to SN and the employs its signing key SK. At the end of this process the user will hold a valid signature by the issuer on the message SN. The pair (SN, signature) now form the credential.，这一点在Line官方版本下载中也有详细论述
Фото: George Christophorou / XinHua / Global Look Press。业内人士推荐体育直播作为进阶阅读
Notice that these “serial numbers” are very similar to the ones we embedded in the single-use credentials above. Each Resource (website) can keep a list of each SN value that it sees, and sites can reject any “show” that repeats a serial number. As long as the User never repeats a counter (and the PRF output is long enough), serial numbers should be unlikely to repeat. However, repetition becomes inevitable if the User ever “cheats” and tries to show the same credential N+1 times.