试题1

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试题2

电子邮件是传播恶意代码的重要途径，为了防止电子邮件中的恶意代码的攻击，用（）方式阅读电子邮件
A、网页
B、纯文本
C、程序
D、会话

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试题3

杂凑函数SHAI的输入分组长度为（）比特
A、128
B、258
C、512
D、1024

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试题4

已知DES算法的S盒如下：

如果该S盒的输入110011，则其二进制输出为（）
A、0110
B、1001
C、0100
D、0101

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试题5

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试题6

电子商务系统除了面临一般的信息系统所涉及的安全威胁之外，更容易成为黑客分子的攻击目标，其安全性需求普遍高于一般的信息系统，电子商务系统中的信息安全需求不包括（）
A、交易的真实性
B、交易的保密性和完整性
C、交易的可撤销性
D、交易的不可抵赖性

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试题7

（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

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试题8

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试题9

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试题10

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