authentication - EMV静态数据认证

Question

在EMV book v4.3 2 page 49 states

If all of the above steps were executed successfully, SDA was successful. The Data Authentication Code recovered in Table 7 shall be stored in tag '9F45'.

如何存储在标签 9F45 中恢复的数据验证码

到目前为止，我一直停留在这个阶段，唯一想到的就是我必须发出 PUT DATA 命令 APDU。

任何帮助将不胜感激

Answer 1

If all of the above steps were executed successfully, SDA was successful. The Data Authentication Code recovered in Table 7 shall be stored in tag '9F45'.

这并不意味着您应该将恢复的数据验证码存储在卡上(因此不需要任何 APDU)。相反，这意味着您应该将 DAC 存储在阅读器(POS 终端)上的数据元素 9F45 中以供进一步处理(您最终必须将其发送给收单行以清算交易)。