更多“—________ —This is Alice speaking. ”相关问题
  • 第1题:

    Alice 发给 Bob 一个经 Alice 签名的文件,Bob 可以通过(16)验证该文件来源的合法性。

    A.Alice 的公钥
    B.Alice 的私钥
    C.Bob的公钥
    D.Bob的私钥

    答案:A
    解析:
    发送方使用自己的私钥加密数据文件(数字签名);接收方接收到这个数字签名文件;接收方使用发送方的公钥来解密这个数字签名文件;如果能够解开,则表明这个文件是发送方发送过来的;否则为伪造的第三方发送过来的。对于发送方来讲这种签名有不可否认性。

  • 第2题:

    提示:爱丽丝的妈妈病了,爱丽丝想向老师格林先生请几天假。
    Alice:Excuse me.Mr.Green.I′d like to take a few days off.
    Green:51?
    Alice:My mother is ill.I have to take care of her.
    Green:Oh dear!I am sorry to hear that.52?
    Alice:No.thank you.My mother has caught a bad cold.She has a high fever and coughs day and night.The doctor says my mother has to be in hospital for a few days.I would like to be with her.
    Green:I understand.53?
    Alice:I hope to be back next Wednesday.
    Green:That′s all right.54
    Alice:Thank you,Mr.Green.That′s very kind of you.I will write it immediately.
    Green:55

    第52题答案是


    答案:
    解析:
    Is there anything I can do for you

  • 第3题:

    Alice向Bob发送消息时,签名者Alice可以使用______生成该消息的签名。

    A.Bob的私钥

    B.Bob的公钥

    C.Alice的私钥

    D.Alice的公钥


    Alice的私钥

  • 第4题:

    Alice发送带数字签名的消息共有以下4个步骤,步骤的正确顺序是()。

    ①Alice生成消息摘要 ②Alice生成消息

    ③Alice发送消息 ④Alice利用私钥生成签名

    A.①②③④
    B.①②④③
    C.②①④③
    D.②①③④

    答案:C
    解析:
    在数字签名机制中,并非直接对消息进行签名,而是对消息形成的再要信息进程签名。正确的顺序应该是发送发先生成消息,然后利用MD5或sha-1消息摘要算法生成消息的摘要信息,然后利用发送发私钥对摘要值进行签名,并将此带有签名摘要值的消息发送至接收方。而接收方会利用同样的信息摘要算法,算出消息正文的摘要值,然后利用发送方的公钥验证发送方的签名摘要信息,并得到发送方的摘要值,两个摘要值对比,以判断消息在传输中是否被破坏。

  • 第5题:

    提示:爱丽丝的妈妈病了,爱丽丝想向老师格林先生请几天假。
    Alice:Excuse me.Mr.Green.I′d like to take a few days off.
    Green:51?
    Alice:My mother is ill.I have to take care of her.
    Green:Oh dear!I am sorry to hear that.52?
    Alice:No.thank you.My mother has caught a bad cold.She has a high fever and coughs day and night.The doctor says my mother has to be in hospital for a few days.I would like to be with her.
    Green:I understand.53?
    Alice:I hope to be back next Wednesday.
    Green:That′s all right.54
    Alice:Thank you,Mr.Green.That′s very kind of you.I will write it immediately.
    Green:55'

    第53题答案是


    答案:
    解析:
    How long will you be away

  • 第6题:

    Alice向Bob发送消息时,签名者Alice可以使用()生成该消息的签名。

    A.Alice的公钥

    B.Alice的私钥

    C.Bob的公钥

    D.Bob的私钥


    Alice的私钥