信息安全工程师每日一练试题（2023/9/11）
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信息安全工程师每日一练试题内容（2023/9/11）
试题1
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
试题参考答案：D、C、A、B、A
试题解析与讨论：www.cnitpm.com/st/389944612.html
试题2
网络安全管理是对网络系统中网管对象的风险进行控制。给操作系统打补丁属于（ ）方法。
A．避免风险
B．转移风险
C．减少风险
D．消除风险查看答案
试题参考答案：C
试题解析与讨论：www.cnitpm.com/st/522847715.html
试题3
深度流检测技术就是以流为基本研究对象，判断网络流是否异常的一种网络安全技术，其主要组成部分通常不包括（）
A、流特征选择
B、流特征提供
C、分类器
D、响应查看答案
试题参考答案：D
试题解析与讨论：www.cnitpm.com/st/284892858.html
试题4
包过滤是在IP层实现的防火墙技术，根据包的源IP地址、目的IP地址、源端口、目的端口及包传递方向等包头信息判新是否允许包通过。包过滤型防火墙扩展IP访问控制规则的格式如下：
access-list list-number {demy|permit}protocol
source source-wildcard source-qualifiers
destination destination-wildcard destination-qualifiers[log|log-input]
则以下说法错误的是 ( )。
A．source表示来源的IP地址
B．deny表示若经过过滤器的包条件匹配，则允许该包通过
C．destination表示目的IP地址
D．log表示记录符合规则条件的网络包查看答案
试题参考答案：B
试题5
SM4是一种分组密码算法，其分组长度和密钥长度分别为（）。
A.64位和128位
B.128位和128位
C.128位和256位
D.256位和256位查看答案
试题参考答案：B
试题6
（ ）攻击是指借助于客户机/服务器技术,将多个计算机联合起来作为攻击平台，对一个或多个目标发动DoS攻击，从而成倍地提高拒绝服务攻击的威力。
A.缓冲区溢出
B.分布式拒绝服务
C.拒绝服务
D. 口令查看答案
试题参考答案：B
试题7
以下关于认证技术的描述中，错误的是（ ）。
A.身份认证是用来对信息系统中实体的合法性进行验证的方法
B.消息认证能够验证消息的完整性
C.数字签名是十六进制的字符串
D.指纹识别技术包括验证和识别两个部分查看答案
试题参考答案：C
试题8
当防火墙在网络层实现信息过滤与控制时,主要针对TCP/IP协议中的数据包头制定规则匹配条件并实施过滤,该规则的匹配条件不包括（ ）。
A.IP源地址
B.源端口
C.IP目的地址
D.协议查看答案
试题参考答案：B
试题9
在非安全的通信环境中，为了保证消息来源的可靠性，通常采用的安全防护技术是（）
A.信息隐藏技术
B.数据加密技术
C.消息认证技术
D.数字水印技术查看答案
试题参考答案：C
试题10
能力成熟度模型（CMM）是对一个组织机构的能力进行成熟度评估的模型，成熟度级别一般分为五级：1级-非正式执行，2级-计划跟踪，3级-充分定义，4级-量化控制，5级-持续优化。在软件安全能力成熟度模型中，漏洞评估过程属于( )
A．CMM1级
B．CMM2级
C．CMM3级
D．CMM4级查看答案
试题参考答案：C
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