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信息安全工程師每日一練試題內(nèi)容（2021/11/6）

試題1：

67mod119的逆元是（）
A、52
B、67
C、16
D、19

試題解析與討論：m.xiexiliangjiufa.com/st/2851225294.html
試題參考答案：C

試題2： 計(jì)算機(jī)取證主要是對電子證據(jù)的獲取、分析、歸檔和描述的過程，而電子證據(jù)需要在法庭上作為證據(jù)展示，進(jìn)行計(jì)算機(jī)取證時應(yīng)當(dāng)充分考慮電子證據(jù)的真實(shí)性和電子證據(jù)的證明力，除了相關(guān)準(zhǔn)備之外，計(jì)算機(jī)取證步驟通常不包括（）
A.保護(hù)目標(biāo)計(jì)算機(jī)系統(tǒng)
B.確定電子證據(jù)
C.收集電子數(shù)據(jù)、保全電子證據(jù)
D.清除惡意代碼試題解析與討論：m.xiexiliangjiufa.com/st/326941650.html
試題參考答案：D

試題3： 無論是哪一種Web服務(wù)器，都會受到HTTP協(xié)議本身安全問題的困擾，這樣的信息系統(tǒng)安全漏洞屬于（  ）。
A.開發(fā)型漏洞
B.運(yùn)行型漏洞
C.設(shè)計(jì)型漏洞
D.驗(yàn)證型漏洞
試題解析與討論：m.xiexiliangjiufa.com/st/4112713490.html
試題參考答案：C

試題4： 工控系統(tǒng)廣泛應(yīng)用于電力、石化、醫(yī)藥、航天等領(lǐng)域，已經(jīng)成為國家關(guān)鍵基礎(chǔ)設(shè)施的重要組成部分。作為信息基礎(chǔ)設(shè)施的基礎(chǔ)，電力工控系統(tǒng)安全面臨的主要威脅不包括（）
A.內(nèi)部人為風(fēng)險
B.黑客攻擊
C.設(shè)備損耗
D.病毒破壞試題解析與討論：m.xiexiliangjiufa.com/st/327068465.html
試題參考答案：C

試題5： 密碼分析者針對加解密算法的數(shù)學(xué)基礎(chǔ)和某些密碼學(xué)特性,根據(jù)數(shù)學(xué)方法破譯密碼的攻擊方式稱為（  ）。
A.數(shù)學(xué)分析攻擊
B.差分分析攻擊
C.基于物理的攻擊
D.窮舉攻擊
試題解析與討論：m.xiexiliangjiufa.com/st/3892725663.html
試題參考答案：A

試題6： 如果破譯加密算法所需要的計(jì)算能力和計(jì)算時間是現(xiàn)實(shí)條件所不具備的,那么就認(rèn)為相應(yīng)的密碼體制是（  ）。
A.實(shí)際安全
B.可證明安全
C.無條件安全
D.絕對安全
試題解析與討論：m.xiexiliangjiufa.com/st/3899110708.html
試題參考答案：A

試題7： 對于提高人員安全意識和安全操作技能來說，以下所列的安全管理方法最有效的是 （  ）。
A、安全檢查
B、安全教育和安全培訓(xùn)
C、安全責(zé)任追究
D、安全制度約束
試題解析與討論：m.xiexiliangjiufa.com/st/4108914134.html
試題參考答案：B

試題8：

以下關(guān)于隧道技術(shù)說法不正確的是（）
A、隧道技術(shù)可以用來解決TCP/IP協(xié)議的某種安全威脅問題
B、隧道技術(shù)的本質(zhì)是用一種協(xié)議來傳輸另外一種協(xié)議
C、IPSec協(xié)議中不會使用隧道技術(shù)
D、虛擬專用網(wǎng)中可以采用隧道技術(shù)

試題解析與討論：m.xiexiliangjiufa.com/st/2850118239.html
試題參考答案：C

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
試題解析與討論：m.xiexiliangjiufa.com/st/4115223167.html
試題參考答案：A、D、C、B、A

試題10： 利用公開密鑰算法進(jìn)行數(shù)據(jù)加密時,采用的方式是（  ）。
A.發(fā)送方用公開密鑰加密,接收方用公開密鑰解密
B.發(fā)送方用私有密鑰加密,接收方用私有密鑰解密
C.發(fā)送方用公開密鑰加密,接收方用私有密鑰解密
D.發(fā)送方用私有密鑰加密,接收方用公開密鑰解
試題解析與討論：m.xiexiliangjiufa.com/st/3899312903.html
試題參考答案：C