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名词解释题
digital signature数字签名
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下面算法中，属于非对称密钥加密算法的是__（53）__。A.DES（Digital Encryption Standard）B.RC2（Rivest Ciphers 2）C.RC5（Rivest Ciphers 5）D.DSA（Digital Signature Algorithm）
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数字签名(Digital Signature)：即是只有信息发送者使用公开密钥算法的主要技术产生的别人无法伪造的一段数字串。下列各项中，(1)是数字签名不能保证的。A．接收者能够核实发送者对报文的签名B．发送者事后不能抵赖对报文的签名C．接收者者不能伪造对报文的签名D．发送者能够保证只有接收者才能打开报文
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Symmetric, or private-key, encryption is based on a secret key that is shared by both communcating parties. The （ ） party uses the secret key as part of the mathematical operation to encrypt （ ） text to cipher text. The receiving party uses the same secret key to decrypt the cipher text to plain text. Asymmetric, or public-key, encryption uses two different keys for each user: one is a （ ） key known only to this one user; the other is a corresponding public key, which is accessible to anyone. The private and public keys are mathematically related by the encryption algorithm. One key ia used for encyption and the other for decryption, depending on the nature of the communication service being implemented. In addition, public key encryption technoligies allow digital （ ） to be placed on messages. A digital signature uses the senders private key to encrypt some portion of the message. When the message is received, the receiver uses the senders （ ） key tp decipher the digital signature to verify the senders identity.A.host B.terminal C.sending D.receiving A.plain B.cipher C.public D.private A.plain B.cipher C.public D.private A.interpretation B.signatures C.encryption D.decryption A.plain B.cipher C.public D.private
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Whatwillbeenabledbythescanningtechnology－TheDynamicVectorStreaming(DVS)?()
A.Firmware-levelvirusdetectionB.Signature-basedvirusfilteringC.Layer4virusdetectionD.Signature-basedspywarefiltering
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Symmetric, or private-key, encryption is based on a secret key that is shared by both communcating parties. The （ ） party uses the secret key as part of the mathematical operation to encrypt （ ） text to cipher text. The receiving party uses the same secret key to decrypt the cipher text to plain text. Asymmetric, or public-key, encryption uses two different keys for each user: one is a （ ） key known only to this one user; the other is a corresponding public key, which is accessible to anyone. The private and public keys are mathematically related by the encryption algorithm. One key ia used for encyption and the other for decryption, depending on the nature of the communication service being implemented. In addition, public key encryption technoligies allow digital （_______） to be placed on messages. A digital signature uses the sender's private key to encrypt some portion of the message. When the message is received, the receiver uses the sender's （） key tp decipher the digital signature to verify the sender's identity.横线处应选（ ）。
A. interpretation
B.signatures
C. encryption
D.decryption
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Why does a digital signature CONTAIN a message digest?为什么数字签名包含一个消息摘要？（）A、To confirm the identity of the receiver 为了确认接收者的身份B、To indicate the encryption algorithm 为了标注加密算法C、To detect any alteration of the message 为了检测对消息的篡改D、To enable transmission in a digital format 为了便于进行数字格式传输
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Which statement is true about the digital to analog conversion process？（）A、the two steps of digital to analog conversion are decompression and reconstruction of the analog signalB、the two steps of digital to analog conversion are decoding and filteringC、the two steps of digital to analog conversion are decompression and filtering of the analog signalD、the two steps of digital to analog conversion are quantization and decoding
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与RSA（rivest，shamir，adleman）算法相比，DSS（digital signature standard）不包括（）。A、数字签名B、鉴别机制C、加密机制D、数据完整性
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单选题Examine the following options ，when editing global IPS settings， which one determines if the IOS- basedIPS feature will drop or permit traffic for a particular IPS signature engine while a new signature for thatengine is being compiled？（）A
Enable Signature DefaultB
Enable Engine Fail ClosedC
Enable Default IOS Signature ActualTests.comD
Enable Fail Opened
考题
单选题Why does a digital signature CONTAIN a message digest?为什么数字签名包含一个消息摘要？（）A
To confirm the identity of the receiver 为了确认接收者的身份B
To indicate the encryption algorithm 为了标注加密算法C
To detect any alteration of the message 为了检测对消息的篡改D
To enable transmission in a digital format 为了便于进行数字格式传输
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单选题与RSA（Rivest，Shamir，Adleman）算法相比，DDS（Digital Signature Standard）不包括（）A
数字签名B
鉴别机制C
加密机制D
数据完整性
考题
判断题数字签名（Digital Signature）又称为电子签名，是对网络上传输的信息进行签名确认的一种方式。A
对B
错
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