多选题Which two statements about the Diffie-Hellman （DH） key exchange process are correct？（）AIn the DH key exchange process， the session key is never passed across the network.BIn the DH key exchange process， the public and private keys are mathematically re

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多选题

Which two statements about the Diffie-Hellman （DH） key exchange process are correct？（）

In the DH key exchange process， the session key is never passed across the network.

In the DH key exchange process， the public and private keys are mathematically related using the DH algorithm.

In the DH key exchange process， the session key is passed across the network to the peer for confirmation.

In the DH key exchange process， the public and private keys are not mathematically related， ensuring higher security

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相似问题和答案

第1题：

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&39;s private key to encrypt some portion of the message. When the message is received, the receiver uses the sender&39;s （） key tp decipher the digital signature to verify the sender&39;s 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

正确答案：C,A,D,B,C

第2题：

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. plain
B. cipher
C.public
D.private

答案：C

解析：

对称加密或私钥加密的基础是通信双方共享同一密钥。发送方使用一个密钥作为数学运算的一部分把明文加密成密文。接收方使用同一密钥把密文解密变成明文。在非对称或公钥加密方法中，每个用户使用两种不同的密钥:一个是只有这个用户知道的私钥;另一个是与其对应的任何人都知道的公钥。根据加密算法，私钥和公钥是数学上相关的。一个密钥用于加密，而另一个用于解密，依赖于实现的通信服务的特点而用法有所不同。此外，公钥加密技术也可以用于报文的数字签名。数字签名时使用发送方的私钥来加密一部分报文。当接收方收到报文时，就用发送方的公钥来解密数字签名，以便对发送方的标识进行验证。

第3题：

In a public-key cryptosystem,(71)encrypted with the public key can only be deciphered with the private key from the same(72). Conversely,(71)encrypted with the private key can be decrypted only with the public key. Users can make their public keys(73)available or place them at a key distribution center or others to access. However, the private key must be(74)safe. In public-key systems there's no(75)to find a safe channel for communicating a shared secret key.

A．binarytext

B．hypertext

C．plaintext

D．supertext

正确答案：C

第4题：

What is the objective of Diffie-Hellman？（）

A、used to verify the identity of the peer
B、used between the initiator and the responder to establish a basic security policy
C、used to establish a symmetric shared key via a public key exchange process
D、used for asymmetric public key encryption

正确答案:C

第5题：

Which three are distinctions between asymmetric and symmetric algorithms？（）

A、Only symmetric algorithms have a key exchange technology built in
B、Asymmetric algorithms are used quite often as key exchange protocols for symmetricalgorithms
C、Only asymmetric algorithms have a key exchange technology built in
D、Asymmetric algorithms are based on more complex mathematical computations

正确答案:B,C,D

第6题：

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

答案：B

解析：

第7题：

IPSEC技术的IKE（Internet key exchange）协议不包含以下哪个协议？（）

A、SKEME
B、Oakley
C、ISAKMP
D、Diffie-Hellman

正确答案:D

第8题：

Which statement is true regarding a session key in the Diffie－Hellman key－exchange process?()

A. A session key value is exchanged across the network.

B. A session key never passes across the network.

C. A session key is used as the key for asymmetric data encryption.

D. A session key is used as the key for symmetric data encryption.

参考答案：B

第9题：

Which statement is true about a certificate authority？（）

A、An entity responsible for registering the private key encryption used in a PKI
B、An agency responsible for granting and revoking public-private key pairs
C、A trusted third party responsible for signing the public keys of entities in a PKIbased system
D、A trusted third party responsible for signing the private keys of entities in a PKIbased system

正确答案:C

第10题：

Which of the following statements that describe Diffie Hellman Key exchange are correct？（）

A、 A DH key exchange is an algorithm that utilizes asymmetric cryptographic keys.
B、 The DH key exchange is used to establish a shared secret over an insecure medium during an IPSec phase 1 exchange.
C、 The DH exchange is susceptible to man-in-the-middle attacks.
D、 The DH exchange is used to authenticate the peer device duringan IPSec phase 1 exchange.
E、A DH exchange provides Perfect Forward Secrecy （PFS）.

正确答案:A,B,C,E

多选题Which two statements about the Diffie-Hellman （DH） key exchange process are correct？（）AIn the DH key exchange process， the session key is never passed across the network.BIn the DH key exchange process， the public and private keys are mathematically re

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