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 secre

题目

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

相似考题

1.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．binarytextB．hypertextC．plaintextD．supertext

2.Which two statements regarding symmetric key encryption are true?() (Choose two.)A. The same key is used for encryption and decryption.B. It is commonly used to create digital certificate signatures.C. It uses two keys: one for encryption and a different key for decryption.D. An attacker can decrypt data if the attacker captures the key used for encryption.

3.All three types of cryptography schemes have unique function mapping to specific applications. For example, the symmetric key( ) approach is typically used for the encryption of data providing ( ) , whereas asymmetric key cryptography is mainly used in key ( ) and nonrepudiation , thereby providing confidentiality and authentication. The hash ( ) (noncryptic), on the other hand, does not provide confidentiality but provides message integrity, and cryptographic hash algorithms provide message ( ) and identity of peers during transport over insecure channels.A.CryptographyB.decodeC.privacyD.security@@@SXB@@@A.ConductionB.confidenceC.confidentialityD.connection@@@SXB@@@A.AuthenticationB.structureC.encryptionD.exchange@@@SXB@@@A.AlgorithmB.SecureC.structureD.encryption@@@SXB@@@A.ConfidentialityB.integrityC.serviceD.robustness

4.Which encryption type is used to secure user data in an IPsec tunnel?()A. symmetric key encryptionB. asymmetric key encryptionC. RSAD. digital certificates

更多“Symmetric, or private－key, encryption is based on a secret key that is shared by both comm ”相关问题

  • 第1题：

    Which two features did WPAv1 add to address the inherent weaknesses found in WEP?()

    A.a stronger encryption algorithm

    B.key mixing using temporal keys

    C.shared key authentication

    D.a shorter initialization vector

    E.per frame sequence counters


    参考答案：B, E

  • 第2题：

    All three types of cryptography schemes have unique function mapping to specific．For example,the symmetric key approach（ ）is typically used for the encryption of data providing（ ）,whereas asymmetric key cryptography is maidy used in key（ ）and nonrepudiation,thereby providing confidentiality and authentication．The hash（本题）（noncryptic）,on the other hand,does not provide confidentiality but provides message integrity,and cryptographic hash algorithms provide message（ ）and identity of peers during transport over insecure channels．

    A.Algorithm
    B.Secure
    C.structure
    D.encryption

    答案：A
    解析：

  • 第3题：

    All three types of cryptography schemes have unique function mapping to specific．For example, the symmetric key approach （71） is typically used for the encryption of data providing（72）, whereas asymmetric key cryptography is maidy used in key（73）and nonrepudiation, thereby providing confidentiality and authentication． The hash（74）（noncryptic）, on the other hand, does not provide confidentiality but provides message integrity, and cryptographic hash algorithms provide message（75）and identity of peers during transport over insecure channels．

    A.Authentication
    B.structure
    C.encryption
    D.exchange

    答案：D
    解析：
    略

  • 第4题：

    The RSA algorithm is an example of what type of cryptography?RSA算法是下面哪种算法的典型例子？（）

    • A、Private Key.私钥
    • B、Symmetric Key对称密钥
    • C、Secret Key秘密密钥
    • D、Asymmetric Key.非对称密钥

    正确答案:D

  • 第5题：

    Which two features did WPAv1 add to address the inherent weaknesses found in WEP?（）

    • A、a stronger encryption algorithm
    • B、key mixing using temporal keys
    • C、shared key authentication
    • D、a shorter initialization vector
    • E、per frame sequence counters

    正确答案:B,E

  • 第6题：

    Which two statements are true about the Wi-Fi Protected Access （WPA） and Wi-Fi Protected Access version 2 （WPA2） security solutions？（）

    • A、both WPA and WPA2 require authentication support via IEEE 802.1 x and Pre-Shared Key （PSK）
    • B、both WPA and WPA2 address all known Wired Equivalent Privacy （WEP） vulnerabilities in the IEEE 802.11i security implementation
    • C、WPA is supported on client devices only. WPA2 is supported on both access point （AP） and client devices
    • D、WPA provides only a standard for authentication. WPA2 provides a standard for authentication and encryption
    • E、WPA requires encryption support via Temporal Key Integrity Protocol （TKIP） WPA2 provides encryption support via （symmetric block cipher）AES-CCMP

    正确答案:A,E

  • 第7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.

    正确答案:B

  • 第8题：

    You are a professional level SQL Sever 2008 Database Administrator in an international corporation named Wiikigo. You are experienced in managing databases in an enterprise-level organization, optimizing and sustaining the database life cycle. In the company, your job is to implement solutions on security, troubleshooting, deployment and optimization. A SQL Server 2008 instance is managed by you. A database is utilized by the instance, and the database is utilized by a Web-based application. 15,000 transactions are processed by the application every minute. A column is contained by a table in the database, and the column is utilized only by the application. Sensitive data is stored in this column. The sensitive data should be stored with the highest security level. In addition, the least amount of memory space and processor time should be utilized. From the following four encryption types, which one should you utilize?（）

    • A、Asymmetric key encryption should be utilized.
    • B、Certificate-based encryption should be utilized.
    • C、Symmetric key encryption should be utilized.
    • D、Transparent data encryption should be utilized.

    正确答案:C

  • 第9题：

    多选题
    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： C,A
    解析： 暂无解析

  • 第10题：

    单选题
    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
    解析： 暂无解析

  • 第11题：

    多选题
    Which two statements are true about the Wi-Fi Protected Access （WPA） and Wi-Fi Protected Access version 2 （WPA2） security solutions？（）
    A

    both WPA and WPA2 require authentication support via IEEE 802.1 x and Pre-Shared Key （PSK）

    B

    both WPA and WPA2 address all known Wired Equivalent Privacy （WEP） vulnerabilities in the IEEE 802.11i security implementation

    C

    WPA is supported on client devices only. WPA2 is supported on both access point （AP） and client devices

    D

    WPA provides only a standard for authentication. WPA2 provides a standard for authentication and encryption

    E

    WPA requires encryption support via Temporal Key Integrity Protocol （TKIP） WPA2 provides encryption support via （symmetric block cipher）AES-CCMP


    正确答案： E,A
    解析： 暂无解析

  • 第12题：

    单选题
    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.


    正确答案： A
    解析： 暂无解析

  • 第13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：
    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14题：

    All three types of cryptography schemes have unique function mapping to specific．For example,the symmetric key approach（ ）is typically used for the encryption of data providing（本题）,whereas asymmetric key cryptography is maidy used in key（ ）and nonrepudiation,thereby providing confidentiality and authentication．The hash（ ）（noncryptic）,on the other hand,does not provide confidentiality but provides message integrity,and cryptographic hash algorithms provide message（ ）and identity of peers during transport over insecure channels．

    A.Conduction
    B.confidence
    C.confidentiality
    D.connection

    答案：C
    解析：

  • 第15题：

    Where parties do not have a shared secret and large quantities of sensitive information must be passed, the most efficient means of transferring information is to use Hybrid Encryption Methods. What does this mean?双方没有共享的密钥以及大量的敏感信息需要传输，最有效的用于信息传输的的方式是使用混合传输信息加密算法。这是什么意思？（）

    • A、Use of software encryption assisted by a hardware encryption accelerator.使用由硬件加密加速器协助的软件加密
    • B、Use of the recipient’s public key for encryption and decryption based on the recipient’s private key.使用接受方的公钥进行加密以及使用接受者的私钥既你想那个解密
    • C、Use of public key encryption to secure a secret key，and message encryption using the secret key.使用公钥加密来加密秘密会话密钥，并且使用秘密会话密钥来加密信息
    • D、Use of elliptic curve encryption.使用椭圆曲线加密

    正确答案:C

  • 第16题：

    You are enabling AAA RADIUS/TACACS+ on a UCS which attribute must be added to the User account?（）

    • A、Encryption algorithm
    • B、Shared Secret Key
    • C、Security policy
    • D、CiscoAvPair

    正确答案:D

  • 第17题：

    The enable secret password appears as an MD5 hash in a router’s configuration file， whereas the enablepassword is not hashed （or encrypted， if the password-encryption service is not enabled）. What is thereason that Cisco still support the use of both enable secret and enable passwords in a router’sconfiguration？（）

    • A、The enable password is present for backward compatibility.
    • B、Because the enable secret password is a hash， it cannot be decrypted. Therefore， the enable password is used to match the password that was entered， and the enable secret is used to verify that the enablepassword has not been modified since the hash was generated.
    • C、The enable password is considered to be a router’s public key， whereas the enable secret password is considered to be a router’s private key.
    • D、The enable password is used for IKE Phase I， whereas the enable secret password is used for IKE Phase II.

    正确答案:A

  • 第18题：

    Which two statements about the Wired Equivalent Privacy （WEP） encryption mechanism are true？ （）

    • A、the two methods of authentication using the WEP encryption are open and shared key
    • B、the 802.11 standard defines WEP security using 128-bit keys
    • C、WEP can provide stronger authentication through the use of LEAP， PEAP， or EAP-FAST
    • D、WEP is a scalable encryption solution that uses static keys for authentication
    • E、WEP security provides only one-way authentication
    • F、WEPv2 offers improved encryption by replacing the RC4 encryption mechanism with the AES （symmetric block cipher） mechanism

    正确答案:A,E

  • 第19题：

    Which encryption type is used to secure user data in an IPsec tunnel?（）

    • A、symmetric key encryption
    • B、asymmetric key encryption
    • C、RSA
    • D、digital certificates

    正确答案:A

  • 第20题：

    You administer a SQL Server 2008 instance. The instance hosts a database that is used by a Web-based application. The application processes 15,000 transactions every minute. A table in the database contains a column that is used only by the application. This column stores sensitive data. You need to store the sensitive data in the most secure manner possible. You also need to ensure that you minimize the usage of memory space and processor time. Which encryption type should you use?（）

    • A、Symmetric key encryption
    • B、Asymmetric key encryption
    • C、Certificate-based encryption
    • D、Transparent data encryption

    正确答案:A

  • 第21题：

    单选题
    You are designing a Windows Azure application that will generate events for multiple clients. Client web services might be behind NAT gateways.  You need to recommend an approach that will allow you to broadcast the events to clients.  What should you recommend？（）
    A

     Use ADO.NET Data Services and provide a shared key to clients.

    B

     Use Windows Azure Queues and provide a shared key to clients.

    C

     Use Windows Azure Table storage and providea shared key to clients.

    D

     Use the Windows Azure AppFabric Service Bus and provide a shared secret to clients.


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    The enable secret password appears as an MD5 hash in a router’s configuration file， whereas the enablepassword is not hashed （or encrypted， if the password-encryption service is not enabled）. What is thereason that Cisco still support the use of both enable secret and enable passwords in a router’sconfiguration？（）
    A

    The enable password is present for backward compatibility.

    B

    Because the enable secret password is a hash， it cannot be decrypted. Therefore， the enable password is used to match the password that was entered， and the enable secret is used to verify that the enablepassword has not been modified since the hash was generated.

    C

    The enable password is considered to be a router’s public key， whereas the enable secret password is considered to be a router’s private key.

    D

    The enable password is used for IKE Phase I， whereas the enable secret password is used for IKE Phase II.


    正确答案： A
    解析： 暂无解析

  • 第23题：

    多选题
    Which two statements regarding symmetric key encryption are true?（） (Choose two.)
    A

    The same key is used for encryption and decryption.

    B

    It is commonly used to create digital certificate signatures.

    C

    It uses two keys: one for encryption and a different key for decryption.

    D

    An attacker can decrypt data if the attacker captures the key used for encryption.


    正确答案： D,B
    解析： 暂无解析

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