試題1

查看答案

試題2

電子郵件是傳播惡意代碼的重要途徑，為了防止電子郵件中的惡意代碼的攻擊，用（）方式閱讀電子郵件
A、網(wǎng)頁
B、純文本
C、程序
D、會話

查看答案

試題3

雜湊函數(shù)SHAI的輸入分組長度為（）比特
A、128
B、258
C、512
D、1024

查看答案

試題4

已知DES算法的S盒如下：

如果該S盒的輸入110011，則其二進制輸出為（）
A、0110
B、1001
C、0100
D、0101

查看答案

試題5

查看答案

試題6

電子商務(wù)系統(tǒng)除了面臨一般的信息系統(tǒng)所涉及的安全威脅之外，更容易成為黑客分子的攻擊目標，其安全性需求普遍高于一般的信息系統(tǒng)，電子商務(wù)系統(tǒng)中的信息安全需求不包括（）
A、交易的真實性
B、交易的保密性和完整性
C、交易的可撤銷性
D、交易的不可抵賴性

查看答案

試題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

查看答案

試題8

查看答案

試題9

查看答案

試題10

查看答案