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信息安全工程師每日一練試題（2025/4/24）

來源：信管網(wǎng) 2025年04月25日【所有評(píng)論】

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信息安全工程師每日一練試題內(nèi)容（2025/4/24）

試題1

在DES加密算法中，密鑰長度和被加密的分組長度分別是（）
A、56位和64位
B、56位和56位
C、64位和64位
D、64位和56位
查看答案
試題參考答案：A
試題解析與討論：m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=6&day=2025/4/24
試題2
（）是用每一種病毒體含有的特定字節(jié)串對(duì)被檢測的對(duì)象進(jìn)行掃描。
A．比較法
B．搜索法
C．特征字識(shí)別法
D．分析法
查看答案
試題參考答案：B
試題解析與討論：m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=6&day=2025/4/24
試題3
下列那個(gè)選項(xiàng)與路由器的安全防范工作無關(guān)（）
A．路由器口令管理
B．安裝防火墻
C．遠(yuǎn)程安全訪問路由器
D．路由器信息交換認(rèn)證
查看答案
試題參考答案：A
試題解析與討論：m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=6&day=2025/4/24
試題4
遠(yuǎn)程訪問路由器時(shí)，為了增強(qiáng)路由器安全管理，常用（）替換Telnet。
A．SSH
B．MD5
C．SSL
D．Hash
查看答案
試題參考答案：A
試題解析與討論：m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=6&day=2025/4/24
試題5
網(wǎng)絡(luò)攻擊者常常采用（）技術(shù)來逃避網(wǎng)絡(luò)安全管理人員的追蹤。
A．?dāng)?shù)據(jù)加密
B．?dāng)?shù)據(jù)銷毀
C．?dāng)?shù)據(jù)隱藏
D．病毒更新
查看答案
試題參考答案：C
試題解析與討論：m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=6&day=2025/4/24
試題6
SM3密碼雜湊算法的消息分組長度為（）比特。
A.64
B.128
C.512
D.1024
查看答案
試題參考答案：C
試題解析與討論：m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=6&day=2025/4/24
試題7
在工業(yè)控制系統(tǒng)中，為確保資產(chǎn)安全，以下哪項(xiàng)措施是首要任務(wù)？
A．立即安裝最新的安全補(bǔ)丁
B．建設(shè)工業(yè)控制系統(tǒng)資產(chǎn)清單并明確責(zé)任人
C．對(duì)所有設(shè)備進(jìn)行冗余配置
D．部署防病毒軟件
查看答案
試題參考答案：B
試題解析與討論：m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=6&day=2025/4/24
試題8
AES算法的特點(diǎn)不包含（）
A．保密的
B．靈活性好
C．免費(fèi)的
D．低內(nèi)存需求
查看答案
試題參考答案：A
試題解析與討論：m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=6&day=2025/4/24
試題9
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)designs which have been designated cryptography standards by the US government (though DES's designation was finally withdrawn after the AES was adopted).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：m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=6&day=2025/4/24
試題10
為了防范內(nèi)部威脅，工業(yè)企業(yè)的安全權(quán)限管理應(yīng)遵循什么原則？
A．最大特權(quán)原則
B．權(quán)限平均分配原則
C．最小特權(quán)原則
D．無特權(quán)原則
查看答案
試題參考答案：C
試題解析與討論：m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=6&day=2025/4/24

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