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信息安全工程师每日一练试题内容(2023/7/8)
试题1
1949年,()发表了题为《保密系统的通信理论》的文章,为密码技术的研究奠定了理论基础,由此密码学成了一门科学。查看答案
试题参考答案:A
试题2
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.查看答案
试题参考答案:A、D、C、B、A
试题3
人为的安全威胁包括主动攻击和被动攻击,以下属于被动攻击的是( )。查看答案
试题参考答案:A
试题4
文件型病毒不能感染的文件类型是( )。查看答案
试题参考答案:D
试题解析与讨论:www.cnitpm.com/st/389728017.html
试题5
安全电子交易协议SET是由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,不正确的是( )。查看答案
试题参考答案:C
试题解析与讨论:www.cnitpm.com/st/411403607.html
试题6
僵尸网络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。以下不属于低尸网络传播过程常见方式的是()查看答案
试题参考答案:C
试题解析与讨论:www.cnitpm.com/st/501914322.html
试题7
蠕虫是一种可以独立运行、并且能将自身的一个包含了所有功能的版本传播到其他计算机上的程序。网络蠕虫可以分为:漏洞利用类蠕虫、口令破解类螨虫、电子邮件类蠕虫、P2P类蠕虫等。以下不属于漏洞利用类蠕虫的是()查看答案
试题参考答案:D
试题8
(1)is the science of hiding information. Whereas the goal of cryptography is to make data unreadable by a third party. the goal of steganography is to hide the data from a third party. In this article, I will discuss what steganography is, what purposes it serves, and will provide an example using available software.
There are a large number of steganographic (2)that most of us are familiar with (especially if you watch a lot of spy movies), ranging from invisible ink and microdots to secreting a hidden message in the second letter of each word of a large body of text and spread spectrum radio communication. With computers and networks, there are many other ways of hiding informations, such as:
Covert channels (c,g, Loki and some distributed denial-of-service tools use the Internet Control (3)Protocol, or ICMP, as the communication channel between the “bad guy”and a compromicyed system)
Hidden text within Web pages
Hiding files in “plain sight”(c,g. what better place to “hide”a file than with an important sounding name in the c:\winnt system32 directory)
Null ciphers(c,g, using the first letter of each word to form a hidden message in an otherwise innocuous text)
steganography today, however, is significantly more (4)than the example about suggest, allowing a user to hide large amounts of information within image and audio. These forms of steganography often are used in conjunction with cryptography so the information is double protected; first it is encrypted and then hidden so that an advertisement first. find the information ( an often difficult task in and of itself) and the decrypted it.
The simplest approach to hiding data within an image file is called (5)signature insertion. In this method, we can take the binary representation of the hidden data and the bit of each byte within the covert image. If we are using 24-bit color the amount and will be minimum and indiscriminate to the human eye.
(1)A、Cryptography
B、Geography
C、Stenography
D、Steganography
(2)A、methods
B、software
C、tools
D、services
(3)A、Member
B、Management
C、Message
D、Mail
(4)A、powerful
B、sophistication
C、advanced
D、easy
(5)A、least
B、most
C、much
D、less
查看答案
试题参考答案:D、A、C、B、A
试题9
按照密码系统对明文的处理方法,密码系统可以分为()
A、置换密码系统和易位密码
B、密码学系统和密码分析学系统
C、对称密码系统和非对称密码系统
D、分组密码系统和序列密码系统
查看答案
试题参考答案:D
试题10
无线传感器网络容易受到各种恶意攻击,以下关于其防御手段说法错误的是()。查看答案
试题参考答案:C
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