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信息安全工程師每日一練試題內容（2021/11/21）

試題1： 典型的水印攻擊方式包括:魯棒性攻擊、表達攻擊、解釋攻擊和法律攻擊.其中魯棒性攻擊是指在不損害圖像使用價值的前提下減弱、移去或破壞水印的一類攻擊方式.以下不屬于魯棒性攻擊的是（  ）。
A.像素值失真攻擊
B.敏感性分析攻擊
C.置亂攻擊
D.梯度下降攻擊
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試題參考答案：C

試題2： 網絡系統(tǒng)中針對海量數(shù)據(jù)的加密,通常不采用（  ）方式。
A.會話加密
B.公鑰加密
C.鏈路加密
D.端對端加密
試題解析與討論：m.xiexiliangjiufa.com/st/3897318694.html
試題參考答案：B

試題3：

信息通過網絡進行傳輸?shù)倪^程中，存在著被篡改的風險，為了解決這一安全問題，通常采用的安全防護技術是（）
A、加密技術
B、匿名技術
C、消息認證技術
D、數(shù)據(jù)備份技術

試題解析與討論：m.xiexiliangjiufa.com/st/2848216282.html
試題參考答案：C

試題4： 下列各種協(xié)議中，不屬于身份認證協(xié)議的是（）
A. S/Key口令協(xié)議
B. Kerberos協(xié)議
C. X.509協(xié)議
D. IPSec協(xié)議
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試題參考答案：D

試題5： 計算機病毒是指一種能夠通過自身復制傳染,起破壞作用的計算機程序,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.檢查計算機是否感染病毒,清除部分已感染病毒
試題解析與討論：m.xiexiliangjiufa.com/st/389643226.html
試題參考答案：D

試題6： 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
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試題參考答案：D、C、A、B、A

試題7： 數(shù)字信封技術能夠（  ）。
A.隱藏發(fā)送者的真實身份
B.保證數(shù)據(jù)在傳輸過程中的安全性
C. 對發(fā)送者和接收者的身份進行認證
D.防止交易中的抵賴發(fā)生
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試題參考答案：B

試題8： （  ）攻擊是指借助于客戶機/服務器技術,將多個計算機聯(lián)合起來作為攻擊平臺，對一個或多個目標發(fā)動DoS攻擊，從而成倍地提高拒絕服務攻擊的威力。
A.緩沖區(qū)溢出
B.分布式拒絕服務
C.拒絕服務
D. 口令
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試題參考答案：B

試題9： 互聯(lián)網上通信雙方不僅需要知道對方的地址，也需要知道通信程序的端口號。以下關于端口的描述中，不正確的是（  ）。
A.端口可以泄露網絡信息
B.端口不能復用
C.端口是標識服務的地址
D.端口是網絡套接字的重要組成部分
試題解析與討論：m.xiexiliangjiufa.com/st/4112814820.html
試題參考答案：B

試題10： 安全策略表達模型是一種對安全需求與安全策略的抽象概念模型，一般分為自主訪問控制模型和強制訪問控制模型。以下屬于自主訪問控制模型的是（）
A. BLP模型
B. HRU模型
C. BN模型
D.基于角色的訪問控制模型
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試題參考答案：B