And here is the friction:
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17-летнюю дочь Николь Кидман высмеяли в сети за нелепую походку на модном показе20:47，更多细节参见快连下载安装
IBM 回应 AI 冲击：现代化远不止改代码，详情可参考一键获取谷歌浏览器下载
This serial number check can be done using a simple local database at the Resource (website). Things get a bit more complicated if there are many Resources (say different websites), and you want to prevent credential re-use across all of them. The typical solution outsources serial number checks to some centralized service (or bulletin board) so that a user can’t use the same credential across many different sites.