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信息安全工程師每日一練試題(2023/8/24)

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信息安全工程師每日一練試題內(nèi)容(2023/8/24)

  • 試題1

    ()是一種通過對信息進(jìn)行均衡、安全的防護(hù),提高整個系統(tǒng)最低安全性能的原則。
    A.木桶原則
    B.保密原則
    C.等級化原則
    D.最小特權(quán)原則

    查看答案

    試題參考答案:A

    試題解析與討論:www.ichunya.com/st/3269825030.html

  • 試題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.
    The Data Encryption Standard (DES) and the Advanced Encryption Standard (AES) are( 72 )designs which have been designated cryptography standards by the US government (though DES's designation was finally withdrawn after the AES was adopted). Despite its deprecation as an official standard, DES (especially its still-approved and much more secure triple-DES variant) remains quite popular; it is used across a wide range of applications, from ATM encryption to e-mail privacy and secure remote access. Many other block ciphers have been designed and released, with considerable variation in quality. Many have been thoroughly broken. See Category: Block ciphers.
    Stream ciphers, in contrast to the ‘block’type, create an arbitrarily long stream of key material, which is combined ( 73 )the plaintext bit-by-bit or character-by-character, somewhat like the one-time pad. In a stream cipher, the output( 74 )is created based on an internal state which changes as the cipher operates. That state change is controlled by the key, and, in some stream ciphers, by the plaintext stream as well. RC4 is an example of a well-known, and widely used, stream cipher; see Category: Stream ciphers.
    Cryptographic hash functions (often called message digest functions) do not necessarily use keys, but are a related and important class of cryptographic algorithms. They take input data (often an entire message), and output a short fixed length hash, and do so as a one-way function. For good ones, ( 75 ) (two plaintexts which produce the same hash) are extremely difficult to find.
    Message authentication codes (MACs) are much like cryptographic hash functions, except that a secret key is used to authenticate the hash value on receipt. These block an attack against plain hash functions.
    (71)
    A.plaintext
    B.ciphertext
    C.data
    D.hash
    (72)
    A.stream cipher
    B.hash function
    C.Message authentication code
    D.Block cipher
    (73)
    A.of
    B.for
    C.with
    D.in
    (74)
    A.hash
    B.stream
    C.ciphertext
    D.plaintext
    (75)
    A.collisions
    B.image
    C.preimage
    D.solution

    查看答案

    試題參考答案:A、D、C、B、A

    試題解析與討論:www.ichunya.com/st/4115223167.html

  • 試題3

    訪問控制是對信息系統(tǒng)資源進(jìn)行保護(hù)的重要措施,適當(dāng)?shù)脑L問控制能夠阻止未經(jīng)授權(quán)的用戶有意或者無意地獲取資源。信息系統(tǒng)訪問控制的基本要素不包括(  )。
    A、主體
    B、客體
    C、授權(quán)訪問
    D、身份認(rèn)證

    查看答案

    試題參考答案:D

    試題解析與討論:www.ichunya.com/st/4109027809.html

  • 試題4

    PKI中撤銷證書是通過維護(hù)一個證書撤銷列表CRL來實(shí)現(xiàn)的。以下不會導(dǎo)致證書被撤銷的是(  )。
    A.密鑰泄漏
    B.系統(tǒng)升級
    C.證書到期
    D.從屬變更

    查看答案

    試題參考答案:B

    試題解析與討論:www.ichunya.com/st/4114120079.html

  • 試題5

    按照密碼系統(tǒng)對明文的處理方法,密碼系統(tǒng)可以分為(  )。
    A.對稱密碼系統(tǒng)和公鑰密碼系統(tǒng)
    B.對稱密碼系統(tǒng)和非對稱密碼系統(tǒng)
    C.數(shù)據(jù)加密系統(tǒng)和數(shù)字簽名系統(tǒng)
    D.分組密碼系統(tǒng)和序列密碼系統(tǒng)

    查看答案

    試題參考答案:D

    試題解析與討論:www.ichunya.com/st/3893815370.html

  • 試題6

    有線等效保密協(xié)議WEP采用RC4流密碼技術(shù)實(shí)現(xiàn)保密性,標(biāo)準(zhǔn)的64位標(biāo)準(zhǔn)流WEP用的密鑰和初始向量長度分別是()
    A.32位和32位
    B.48位和16位
    C.56位和8位
    D.40位和24位

    查看答案

    試題參考答案:D

    試題解析與討論:www.ichunya.com/st/3272321085.html

  • 試題7

    以下有關(guān)網(wǎng)站攻擊防護(hù)及安全監(jiān)測技術(shù)的說法,錯誤的 (   )
    A.Web應(yīng)用防火墻針對80、443端口
    B.包過濾防火墻只能基于IP層過濾網(wǎng)站惡意包
    C.利用操作系統(tǒng)的文件調(diào)用事件來檢測網(wǎng)頁文件的完整性變化,可以發(fā)現(xiàn)網(wǎng)站被非授權(quán)修改
    D.網(wǎng)絡(luò)流量清洗可以過濾掉針對目標(biāo)網(wǎng)絡(luò)攻擊的惡意網(wǎng)絡(luò)流量

    查看答案

    試題參考答案:C

    試題解析與討論:www.ichunya.com/st/5225826897.html

  • 試題8

    注入語句:http://xxx.xxx.xxx/abc.asp?p=YY and user>0不僅可以判斷服務(wù)器的后臺數(shù)據(jù)庫是否為SQL-SERVER,還可以得到()
    A、當(dāng)前連接數(shù)據(jù)庫的用戶數(shù)據(jù)
    B、當(dāng)前連接數(shù)據(jù)庫的用戶名
    C、當(dāng)前連接數(shù)據(jù)庫的用戶口令
    D、當(dāng)前連接的數(shù)據(jù)庫名

    查看答案

    試題參考答案:B

    試題解析與討論:www.ichunya.com/st/2846214573.html

  • 試題9

    在信息系統(tǒng)安全設(shè)計中,保證“信息及時且可靠地被訪問和使用”是為了達(dá)到保障信息系統(tǒng)()的目標(biāo)。
    A.可用性
    B.保密性
    C.可控性
    D.完整性

    查看答案

    試題參考答案:A

    試題解析與討論:www.ichunya.com/st/502224443.html

  • 試題10

    計算機(jī)病毒是指一種能夠通過自身復(fù)制傳染,起破壞作用的計算機(jī)程序,目前使用的防殺病毒軟件的主要作用是(  )。
    A.檢查計算機(jī)是否感染病毒,清除已感染的任何病毒
    B.杜絕病毒對計算機(jī)的侵害
    C.查出已感染的任何病毒,清除部分已感染病毒
    D.檢查計算機(jī)是否感染病毒,清除部分已感染病毒

    查看答案

    試題參考答案:D

    試題解析與討論:www.ichunya.com/st/389643226.html

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