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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【所有評論】

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信息安全工程師每日一練試題內容（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：www.ichunya.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)串對被檢測的對象進行掃描。
A．比較法
B．搜索法
C．特征字識別法
D．分析法
查看答案
試題參考答案：B
試題解析與討論：www.ichunya.com/exam/ExamDay.aspx?t1=6&day=2025/4/24
試題3
下列那個選項與路由器的安全防范工作無關（）
A．路由器口令管理
B．安裝防火墻
C．遠程安全訪問路由器
D．路由器信息交換認證
查看答案
試題參考答案：A
試題解析與討論：www.ichunya.com/exam/ExamDay.aspx?t1=6&day=2025/4/24
試題4
遠程訪問路由器時，為了增強路由器安全管理，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：www.ichunya.com/exam/ExamDay.aspx?t1=6&day=2025/4/24
試題5
網(wǎng)絡攻擊者常常采用（）技術來逃避網(wǎng)絡安全管理人員的追蹤。
A．數(shù)據(jù)加密
B．數(shù)據(jù)銷毀
C．數(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：www.ichunya.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：www.ichunya.com/exam/ExamDay.aspx?t1=6&day=2025/4/24
試題7
在工業(yè)控制系統(tǒng)中，為確保資產安全，以下哪項措施是首要任務？
A．立即安裝最新的安全補丁
B．建設工業(yè)控制系統(tǒng)資產清單并明確責任人
C．對所有設備進行冗余配置
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：www.ichunya.com/exam/ExamDay.aspx?t1=6&day=2025/4/24
試題8
AES算法的特點不包含（）
A．保密的
B．靈活性好
C．免費的
D．低內存需求
查看答案
試題參考答案：A
試題解析與討論：www.ichunya.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)designs which have been designated cryptography standards by the US government (though DES's designation was finally withdrawn after the AES was adopted).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：www.ichunya.com/exam/ExamDay.aspx?t1=6&day=2025/4/24
試題10
為了防范內部威脅，工業(yè)企業(yè)的安全權限管理應遵循什么原則？
A．最大特權原則
B．權限平均分配原則
C．最小特權原則
D．無特權原則
查看答案
試題參考答案：C
試題解析與討論：www.ichunya.com/exam/ExamDay.aspx?t1=6&day=2025/4/24

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