2026年06月05日来源：信管网 作者:cnitpm
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信息安全工程师每日一练试题内容（2026/6/4）
试题1
（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2
（ ）以隔离卡的方式接入目标主机，也可以将隔离卡整合入主机，以整机的形式作为产品。查看答案
试题参考答案：B
试题3
工业企业在划分安全域时，以下哪种做法是不推荐的？查看答案
试题参考答案：B
试题4
包过滤防火墙的有点不包括（ ）查看答案
试题参考答案：D
试题5
下列哪项不是数据库防火墙的功能（ ）查看答案
试题参考答案：C
试题6
第三方平台故障属于（ ）查看答案
试题参考答案：B
试题7
特洛伊木马（Trojan Horse）在计算机安全领域中主要指的是（ ）查看答案
试题参考答案：B
试题8
在IPSec虚拟专用网当中，提供数据源认证的协议是（ ）查看答案
试题参考答案：B
试题9
密码学的主要目的是（ ）查看答案
试题参考答案：C
试题10
关于PGP使用的密码技术，不正确的是（ ）查看答案
试题参考答案：D
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