To “show” the credential to some Resource, the user simply needs to hand over the pair (SN, signature). Assuming the Resource knows the public key (PK) of the issuer, it can simply verify that (1) the signature is valid on SN, and (2) nobody has every used that value SN in some previous credential “show”.
В Финляндии захотели пойти на опасный шаг против России02:50
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Одному из российских рынков предсказали рост до полутриллиона рублей15:00。关于这个话题，旺商聊官方下载提供了深入分析