单击加密图标，并将其拖动到处理线上之前的加密操作图标后的位置。
Click on the Encrypt icon and drag it to the processing line after the previous Encrypt action icon.
单击加密图标，并将其拖动到处理线上刚刚创建的签名操作图标后的位置。
Click on the Encrypt icon and drag it to the processing line after the Sign action icon just created.
单击验证图标，并将其拖动到处理线中之前创建的解密操作图标后的位置，并将图标释放到线上。
Click on the verify icon and drag it to the processing line after the decrypt action icon previously created and drop the icon onto the line.
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