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信息安全工程師每日一練試題（2021/10/4）在線測試：www.pokkc.com/exam/ExamDay.aspx?t1=6&day=2021/10/4

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信息安全工程師每日一練試題內容（2021/10/4）

試題1：

設在RSA的公鑰密碼體制中，公鑰為（c，n）=（13,35），則私鑰為（）
A、11
B、13
C、15
D、17

試題解析與討論：www.pokkc.com/st/2850915759.html
試題參考答案：B

試題2： 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
試題解析與討論：www.pokkc.com/st/389944612.html
試題參考答案：D、C、A、B、A

試題3：

下列說法中，錯誤的是（）
A、服務攻擊是針對某種特定攻擊的網絡應用的攻擊
B、主要的滲入威脅有特洛伊木馬和陷阱
C、非服務攻擊是針對網絡層協議而進行的
D、對于在線業(yè)務系統的安全風險評估，應采用最小影響原則

試題解析與討論：www.pokkc.com/st/284666620.html
試題參考答案：B

試題4：

以下關于加密技術的敘述中，錯誤的是（）
A、對稱密碼體制的加密密鑰和解密密鑰是相同的
B、密碼分析的目的就是千方百計地尋找密鑰或明文
C、對稱密碼體制中加密算法和解密算法是保密的
D、所有的密鑰都有生存周期

試題解析與討論：www.pokkc.com/st/28472951.html
試題參考答案：C

試題5： 一個密碼系統如果用E表示加密運算，D表示解密運算，M表示明文,C表示密文,則下面描述必然成立的是（  ）。
A. E(E(M))=C
B. D(E(M))=M
C. D(E(M))=C
D. D(D(M))=M
試題解析與討論：www.pokkc.com/st/389293064.html
試題參考答案：B

試題6： 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
試題解析與討論：www.pokkc.com/st/3272020263.html
試題參考答案：B

試題7：

深度流檢測技術就是以流為基本研究對象，判斷網絡流是否異常的一種網絡安全技術，其主要組成部分通常不包括（）
A、流特征選擇
B、流特征提供
C、分類器
D、響應

試題解析與討論：www.pokkc.com/st/284892858.html
試題參考答案：D

試題8： 安全電子交易協議SET是由VISA和Mastercard兩大信用卡組織聯合開發(fā)的電子商務安全協議,以下關于SET的敘述中,正確的是（  ）。
A.SET通過向電子商務各參與方發(fā)放驗證碼來確認各方的身份,保證網上支付的安全性
B.SET不需要可信第三方認證中心的參與
C.SET要實現的主要目標包括保障付款安全、確定應用的互通性和達到全球市場的可接受性
D.SET協議主要使用的技術包括:流密碼、公鑰密碼和數字簽名等
試題解析與討論：www.pokkc.com/st/3898217226.html
試題參考答案：C

試題9： 無線傳感器網絡WSN是由部署在監(jiān)測區(qū)域內大量的廉價微型傳感器節(jié)點組成，通過無線通信方式形成的一個多跳的自組織網絡系統。以下針對WSN安全問題的描述中，錯誤的（  ）。
A.通過頻率切換可以有效抵御WSN物理層的電子干擾攻擊
B.WSN鏈路層容易受到拒絕服務攻擊
C.分組密碼算法不適合在WSN中使用
D.蟲洞攻擊是針對WSN路由層的一種網絡攻擊形式
試題解析與討論：www.pokkc.com/st/4111825763.html
試題參考答案：C

試題10：

入侵檢測系統放置在防火墻內部所帶來的好處是（）
A、減少對防火墻的攻擊
B、降低入侵檢測
C、增加對低層次攻擊的檢測
D、增加檢測能力和檢測范圍

試題解析與討論：www.pokkc.com/st/2849616173.html
試題參考答案：B