信息安全工程師每日一練試題（2023/4/22）
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信息安全工程師每日一練試題內容（2023/4/22）
試題1
如果破譯加密算法所需要的計算能力和計算時間是現(xiàn)實條件所不具備的,那么就認為相應的密碼體制是（ ）。
A.實際安全
B.可證明安全
C.無條件安全
D.絕對安全查看答案
試題參考答案：A
試題2
所有資源只能由授權方或以授權的方式進行修改，即信息未經(jīng)授權不能進行改變的特性是指信息的（）。
A.完整性
B.可用性
C.保密性
D.不可抵賴性查看答案
試題參考答案：A
試題3
2018年10月，含有我國SM3雜湊算法的IS0/IEC10118-3: 2018《信息安全技術雜湊函數(shù)第3部分：專用雜湊函數(shù)》由國際標準化組織（ISO）發(fā)布，SM3算法正式成為國際標準。SM3的雜湊值長度為（ ）。
A、8 字節(jié)
B、16字節(jié)
C、32字節(jié)
D、64字節(jié)查看答案
試題參考答案：C
試題4
《計算機信息系統(tǒng)安全保護等級劃分準則》(GB17859-1999)中規(guī)定了計算機系統(tǒng)安全保護能力的五個等級，其中要求對所有主體和客體進行自主和強制訪問控制的是（ ）。
A.用戶自主保護級
B.系統(tǒng)審計保護級
C.安全標記保護級
D.結構化保護級查看答案
試題參考答案：D
試題5
VPN即虛擬專用網(wǎng)，是一種依靠ISP和其他NSP在公用網(wǎng)絡中建立專用的、安全的數(shù)據(jù)通信通道的技術。以下關于虛擬專用網(wǎng)VPN的描述中，錯誤的是（） 。
A.VPN采用隧道技術實現(xiàn)安全通信
B.第2層隧道協(xié)議L2TP主要由LAC和LNS構成
C.IPSec可以實現(xiàn)數(shù)據(jù)的加密傳輸
D.點對點隧道協(xié)議PPTP中的身份驗證機制包括RAP、CHAP、MPPE查看答案
試題參考答案：D
試題6
Kerberos 是一個網(wǎng)絡認證協(xié)議，其目標是使用密鑰加密為客戶端／服務器應用程序提供強身份認證。一個 Kerberos 系統(tǒng)涉及四個基本實體：Kerberos 客戶機、認證服務器 AS、票據(jù)發(fā)放服務器TGS、應用服務器。其中，為用戶提供服務的設備或系統(tǒng)被稱為（ ）
A．Kerberos 客戶機
B．認證服務器AS
C．票據(jù)發(fā)放服務器TGS
D．應用服務器查看答案
試題參考答案：D
試題7
電子商務系統(tǒng)除了面臨一般的信息系統(tǒng)所涉及的安全威脅之外，更容易成為黑客分子的攻擊目標，其安全性需求普遍高于一般的信息系統(tǒng)，電子商務系統(tǒng)中的信息安全需求不包括（）
A、交易的真實性
B、交易的保密性和完整性
C、交易的可撤銷性
D、交易的不可抵賴性查看答案
試題參考答案：C
試題8
Trust is typically interpreted as a subjective belief in the reliability， honesty and security of an entity on which we depend （ ）our welfare .In online environments we depend on a wide spectrun of things , ranging from computer hardware,software and data to people and organizations. A security solution always assumes certain entities function according to specific policies.To trust is precisely to make this sort of assumptions , hence , a trusted entity is the same as an entity that is assumed to function according to policy . A consequence of this is that a trust component of a system must work correctly in order for the security of that system to hold, meaning that when a trusted（ ）fails , then the sytems and applications that depend on it can（ ）be considered secure.An often cited articulation of this principle is:＂ a trusted system or component is one that can break your security policy” ( which happens when the trust system fails ). The same applies to a trusted party such as a service provider ( SP for short )that is , it must operate according to the agreed or assumed policy in order to ensure the expected level of securty and quality of services . A paradoxical conclusion to be drawn from this analysis is that security assurance may decrease when increasing the number of trusted components and parties that a service infrastructure depends on . This is because the security of an infrastructure consisting of many.
Trusted components typically follows the principle of the weakest link , that is ,in many situations the the overall security can only be as strong as the least reliable or least secure of all the trusted components. We cannot avoid using trusted security components,but the fewer the better. This is important to understand when designing the identity management architectures,that is, fewer the trusted parties in an identity management model , stronger the security that can be achieved by it.
The transfer of the social constructs of identity and trust into digital and computational concepts helps in designing and implementing large scale online markets and communities,and also plays an important role in the converging mobile and Internet environments.Identity management (denoted Idm hereafter ) is about recognizing and verifying the correctness of identitied in online environment .Trust management becomes a component of （ ）whenever different parties rely on each other for identity provision and authentication . IdM and Trust management therefore depend on each other in complex ways because the correctness of the identity itself must be trusted for the quality and reliability of the corresponding entity to be trusted.IdM is also an essential concept when defining authorisation policies in personalised services.
Establishing trust always has a cost, so that having complex trust requirement typically leads to high overhead in establishing the required trust. To reduce costs there will be incentives for stakeholders to “cut corners”regarding trust requirements ,which could lead to inadequate security . The challenge is to design IdM systems with relatively simple trust requirements.Cryptographic mechanisms are often a core component of IdM solutions,for example,for entity and data authentication.With cryptography,it is often possible to propagate trust from where it initially exists to where it is needed .The establishment of initial（ ）usually takes place in the physical world,and the subsequent propagation of trust happens online,often in an automated manner.
（71）A.with
B. on
C. of
D. for
（72）A.entity
B.person
C.component
D.thing
（73）A. No longer
B. never
C. always
D.often
（74）A. SP
B. IdM
C.Internet
D.entity
（75）A.trust
B.cost
C.IdM
D. solution查看答案
試題參考答案：D、C、A、B、A
試題9
面向數(shù)據(jù)挖掘的隱私保護技術主要解決高層應用中的隱私保護問題，致力于研究如何根據(jù)不同數(shù)據(jù)挖掘操作的特征來實現(xiàn)對隱私的保護。從數(shù)據(jù)挖掘的角度看，不屬于隱私保護技術的是（）。
A.基于數(shù)據(jù)失真的隱私保護技術
B.基于數(shù)據(jù)匿名化的隱私保護技術
C.基于數(shù)據(jù)分析的隱私保護技術
D.基于數(shù)據(jù)加密的隱私保護技術查看答案
試題參考答案：C
試題10
如果對一個密碼體制的破譯依賴于對某一個經(jīng)過深入研究的數(shù)學難題的解決，就認為相應的密碼體制是（ ）的。
A.計算安全
B.可證明安全
C.無條件安全
D.絕對安全查看答案
試題參考答案：B
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