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信息安全工程師每日一練試題內(nèi)容(2024/8/12)
試題1
為了增強DES算法的安全性,NIST于1999年發(fā)布了三重DES算法--TDEA。設(shè)DES Ek()和DES Dk()分別表示以k為密鑰的DES算法的加密和解密過程,P和O分別表示明文和密文消息,則TDEA算法的加密過程正確的是( )。查看答案
試題參考答案:C
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試題2
(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
試題參考答案:D、A、C、B、A
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試題3
防火墻的經(jīng)典體系結(jié)構(gòu)主要有三種,下圖給出的是()體系結(jié)構(gòu)。查看答案
試題參考答案:C
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試題4
以下那個操作會妨礙口令認證的安全( )查看答案
試題參考答案:B
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試題5
Snort是一款開源的網(wǎng)絡入侵檢測系統(tǒng),能夠執(zhí)行實時流量分析和IP協(xié)議網(wǎng)絡的數(shù)據(jù)包記錄。以下不屬于Snort主要配置模式的是()查看答案
試題參考答案:B
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試題6
( )的技術(shù)特點是電子認證服務機構(gòu)采用PKI技術(shù)、密碼算法等提供數(shù)字證書申請、頒發(fā)、存檔、查詢、廢止等服務,以及基于數(shù)字證書為電子活動提供可信身份、可信時間和可信行為綜合服務。查看答案
試題參考答案:B
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試題7
身份識別在信息安全領(lǐng)域有著廣泛的應用,通過識別用戶的生理特征來認證用戶的身份是安全性很高的身份認證方法。如果把人體特征用于身份識別,則它應該具有不可復制的特點,必須具有()查看答案
試題參考答案:B
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試題8
2021年6月10日,第十三屆全國人民代表大會常務委員會第二十九次會議表決通過了《中華人民共和國數(shù)據(jù)安全法》,該法律自 ( ) 起施行。查看答案
試題參考答案:A
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試題9
下列說法中,錯誤的是()
A、服務攻擊是針對某種特定攻擊的網(wǎng)絡應用的攻擊
B、主要的滲入威脅有特洛伊木馬和陷阱
C、非服務攻擊是針對網(wǎng)絡層協(xié)議而進行的
D、對于在線業(yè)務系統(tǒng)的安全風險評估,應采用最小影響原則
查看答案
試題參考答案:B
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試題10
無線局域網(wǎng)鑒別和保密體系WAPI是我國無線局域網(wǎng)安全強制性標準,以下關(guān)于WAP的描述,正確的是( )。查看答案
試題參考答案:D
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