the full string aababaabab is a valid match: a·ab·ab·a·ab·ab
Single-use (or limited-usage) credentials. The most common approach is to issue credentials that allow the user to log in (“show” the credential) exactly one time. If a user wants to access the website fifty times, then she needs to obtain fifty separate credentials from the Issuer. A hacker can still steal these credentials, but they’ll also be limited to only a bounded number of website accesses. This approach is used by credentials like PrivacyPass, which is used by sites like CloudFlare.
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哪怕被告知它还不够稳定，大概只有80%的可靠性，来回调试会很麻烦，这位出版社经营者也满不在乎，因为觉得，人类也一样会出错。，这一点在快连下载安装中也有详细论述
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