The last 32 bytes contain a 20-byte MAC and padding to bring the data to a
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.，详情可参考同城约会
This story was originally featured on Fortune.com，详情可参考快连官网
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