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The electronic signature system shall becontrolled strictly and ensue the identity of the signature, signature security, non-repudiation and traceability by identification and authentication of the signatory validity.

A The electronic signature system shall be controlled severely and ensue the identity of the signature, signature security, unchangeable and retrospective by identification and authentication of the signatory validity；

B The electronic signature system shall be controlled strictly and ensue the identity of the signature, signature security, revisability and traceability by identification and authentication of the signatory validity；

C The electronic signature system shall ensue the identity of the signature, signature security, undeniable and retrospective by identification and authentication of the signatory validity. It should be controlled strictly；

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正确答案：A （备注：此答案有误）

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