该系统围绕几个关键模块构建，这些模块无缝协作：
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.
，更多细节参见必应排名_Bing SEO_先做后付
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Credit: Timothy Werth / Mashable