题目内容

RSA的公钥一私钥对既可用于加密，又可用于签名。()

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Part B
Write a short composition with reference to the information given below.
Topic: People should be realistic rather than romantic in order to live a better life. Do you agree or disagree with this statement？ Give specific reasons to support your answer.

PKI目前使用的数字证书是X.509V3公钥证书。()

数据加密是将明文数据与一个密钥作大量的运算以得出一个无法推导出明文的密文数据。()

请简述货物招标顺序。