Why doesn't Kunlun Bank show the verification signature for repayment?

1, certificate expired or not updated: the digital certificate of the bank may have expired or need to be updated. If the digital certificate expires, the bank's signature will not be verified.

2. Signature data has been tampered with: repayment information has been tampered with during transmission, resulting in signature verification failure.

3. Signature algorithm mismatch: The signature algorithm used by the bank is different from the repayment information algorithm, which leads to the failure of signature verification.

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