1. There is something wrong with the public key: it generally belongs to IE browser, which can be verified by the following methods: on another PC that can normally use the U shield of the same model, it cannot be used, so it can be replaced at ICBC outlets; If it can be used normally, there is nothing wrong with your U shield.
2. Certificate problem: clear the IE certificate on your own PC, export the IE certificate of the above-mentioned normal PC, and then import it into your own PC.
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