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信息安全工程师每日一练试题内容（2022/3/12）

试题1： （  ）是一种通过不断对网络服务系统进行干扰,影响其正常的作业流程,使系统响应减慢甚至瘫痪的攻击方式。
A.暴力攻击
B.拒绝服务攻击
C.重放攻击
D.欺骗攻击
试题解析与讨论：www.cnitpm.com/st/3894428360.html
试题参考答案：B

试题2： 对信息进行均衡、全面的防护，提高整个系统“安全最低点”的安全性能，这种安全原则被称为（  ）。
A.最小特权原则
B.木桶原则
C.等级化原则
D.最小泄露原则
试题解析与讨论：www.cnitpm.com/st/3893514227.html
试题参考答案：B

试题3： 安全模型是一种对安全需求与安全策略的抽象概念模型，安全策略模型一般分为自主访问控制模型和强制访问控制模型。以下属于自主访问控制模型的是 （  ）。
A.BLP模型
B.基于角色的存取控制模型
C.BN模型
D.访问控制矩阵模型
试题解析与讨论：www.cnitpm.com/st/4109626557.html
试题参考答案：D

试题4：

安全电子交易协议SET是有VISA和MasterCard两大信用卡组织联合开发的电子商务安全协议。以下关于SET的叙述中，正确的是（）
A、SET是一种基于流密码的协议
B、SET不需要可信的第三方认证中心的参与
C、SET要实现的主要目标包括保障付款安全，确定应用的互通性和达到全球市场的可接受性
D、SET通过向电子商务各参与方发放验证码来确认各方的身份，保证网上支付的安全性

试题解析与讨论：www.cnitpm.com/st/2850213651.html
试题参考答案：C

试题5： The modern study of symmetric-key ciphers relates mainly to the study of block ciphers and stream ciphers and to their applications. A block cipher is, in a sense, a modern embodiment of Alberti's polyalphabetic cipher: block ciphers take as input a block of （71 ）and a key, and output a block of ciphertext of the same size. Since messages are almost always longer than a single block, some method of knitting together successive blocks is required. Several have been developed, some with better security in one aspect or another than others. They are the mode of operations and must be carefully considered when using a block cipher in a cryptosystem.
The Data Encryption Standard (DES) and the Advanced Encryption Standard (AES) are( 72 )designs which have been designated cryptography standards by the US government (though DES's designation was finally withdrawn after the AES was adopted). Despite its deprecation as an official standard, DES (especially its still-approved and much more secure triple-DES variant) remains quite popular; it is used across a wide range of applications, from ATM encryption to e-mail privacy and secure remote access. Many other block ciphers have been designed and released, with considerable variation in quality. Many have been thoroughly broken. See Category: Block ciphers.
Stream ciphers, in contrast to the ‘block’type, create an arbitrarily long stream of key material, which is combined ( 73 )the plaintext bit-by-bit or character-by-character, somewhat like the one-time pad. In a stream cipher, the output( 74 )is created based on an internal state which changes as the cipher operates. That state change is controlled by the key, and, in some stream ciphers, by the plaintext stream as well. RC4 is an example of a well-known, and widely used, stream cipher; see Category: Stream ciphers.
Cryptographic hash functions (often called message digest functions) do not necessarily use keys, but are a related and important class of cryptographic algorithms. They take input data (often an entire message), and output a short fixed length hash, and do so as a one-way function. For good ones, ( 75 ) (two plaintexts which produce the same hash) are extremely difficult to find.
Message authentication codes (MACs) are much like cryptographic hash functions, except that a secret key is used to authenticate the hash value on receipt. These block an attack against plain hash functions.
（71）
A.plaintext
B.ciphertext
C.data
D.hash
（72）
A.stream cipher
B.hash function
C.Message authentication code
D.Block cipher
（73）
A.of
B.for
C.with
D.in
（74）
A.hash
B.stream
C.ciphertext
D.plaintext
（75）
A.collisions
B.image
C.preimage
D.solution
试题解析与讨论：www.cnitpm.com/st/4115223167.html
试题参考答案：A、D、C、B、A

试题6： 属于对称加密算法。
A.EIGantal
B.DES
C.MDS
D.RSA
试题解析与讨论：www.cnitpm.com/st/3269024299.html
试题参考答案：B

试题7： DSS数字签名标准的核心是数字签名算法DSA，该签名算法中杂凑函数采用的是（）。
A. SHA1
B. MD5
C. MD4
D. SHA2
试题解析与讨论：www.cnitpm.com/st/3275324398.html
试题参考答案：A

试题8： 我国制定的关于无线局域网安全的强制标准是（）
A.IEEE 802.11
B. WPA
C. WAPI
D. WEP
试题解析与讨论：www.cnitpm.com/st/327138354.html
试题参考答案：C

试题9：

利用公开密钥算法进行数据加密时，采用的方法是（）
A、发送方用公开密钥加密，接收方用公开密钥解密
B、发送方用私有密钥加密，接收方用私有密钥解密
C、发送方用公开密钥加密，接收方用私有密钥解密
D、发送方用私有密钥加密，接收方用公开密钥解密

试题解析与讨论：www.cnitpm.com/st/2847616861.html
试题参考答案：C

试题10：

一个全局的安全框架必须包含的安全结构因素是（）
A、审计、完整性、保密性、可用性
B、审计、完整性、身份认证、保密性、可用性
C、审计、完整性、身份认证、可用性
D、审计、完整性、身份认证、保密性

试题解析与讨论：www.cnitpm.com/st/28490785.html
试题参考答案：B