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信息安全工程师每日一练试题内容（2021/8/17）

试题1：

扫描技术（）
A、只能作为攻击工具
B、只能作为防御工具
C、只能作为检查系统漏洞的工具
D、既可以作为攻击工具，也可以作为防御工具

试题解析与讨论：www.cnitpm.com/st/2850528262.html
试题参考答案：D

试题2： 下列攻击中，不能导致网络瘫痪的是（）
A.溢出攻击
B.钓鱼攻击
C.邮件炸弹攻击
D.拒绝服务攻击
试题解析与讨论：www.cnitpm.com/st/326974758.html
试题参考答案：B

试题3： 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4： 安全策略表达模型是一种对安全需求与安全策略的抽象概念模型，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. HRU模型
C. BN模型
D.基于角色的访问控制模型
试题解析与讨论：www.cnitpm.com/st/3272020263.html
试题参考答案：B

试题5： 以下关于认证技术的描述中，错误的是（）
A.基于生物特征认证一般分为验证和识别两个过程
B.身份认证是用来对信息系统中实体的合法性进行验证的方法
C.数字签名的结果是十六进制的字符串
D.消息认证能够确定接收方收到的消息是否被篡改过
试题解析与讨论：www.cnitpm.com/st/3273527510.html
试题参考答案：C

试题6： 恶意代码是指为达到恶意目的而专门设计的程序或代码。以下恶意代码中，属于脚本病毒的是 （  ）。
A. Worm. Sasser, f
B. Trojan. Huigezi. a
C. Harm. formatC. f
D. Script. Redlof
试题解析与讨论：www.cnitpm.com/st/4110512003.html
试题参考答案：D

试题7： WI-FI网络安全接入是一种保护无线网络安全的系统,WPA加密的认证方式不包括（  ）。
A.WPA和WPA2
B.WEP
C.WPA-PSK
D.WPA2-PSK
试题解析与讨论：www.cnitpm.com/st/389604283.html
试题参考答案：B

试题8：

以下选项中，不属于生物识别方法的是（）
A、指纹识别
B、声音识别
C、虹膜识别
D、个人标记号识别

试题解析与讨论：www.cnitpm.com/st/284607440.html
试题参考答案：D

试题9： 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)designs which have been designated cryptography standards by the US government (though DES's designation was finally withdrawn after the AES was adopted).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.collisons
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、C

试题10： （  ）是指采用一种或多种传播手段，将大量主机感染bot程序，从而在控制者和被感染主机之间形成的一个可以一对多控制的网络。
A.特洛伊木马
B.僵尸网络
C. ARP欺骗
D.网络钓鱼
试题解析与讨论：www.cnitpm.com/st/411025865.html
试题参考答案：B