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信息安全工程师每日一练试题（2023/5/9）在线测试：www.cnitpm.com/exam/ExamDay.aspx?t1=6&day=2023/5/9
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信息安全工程师每日一练试题内容（2023/5/9）
试题1
移位密码的加密对象为英文字母，移位密码采用对明文消息的每一个英文字母向前推移固定key位的方式实现加密。设key=6，则明文“SEC”对应的密文为（）
A.YKI
B.ZLI
C.XJG
D.MYW查看答案
试题参考答案：A
试题解析与讨论：www.cnitpm.com/st/502396132.html
试题2
网络系统中针对海量数据的加密,通常不采用（ ）方式。
A.会话加密
B.公钥加密
C.链路加密
D.端对端加密查看答案
试题参考答案：B
试题3
文件加密就是将重要的文件以密文形式存储在媒介上，对文件进行加密是一种有效的数据加密存储技术。基于Windows系统的是（ ）。
A. AFS
B. TCFS
C. CFS
D. EFS查看答案
试题参考答案：D
试题4
PKI是一种标准的公钥密码的密钥管理平台，数字证书是PKI的基本组成部分。在PKI中，X.509数字证书的内容不包括（）。
A.加密算法标识
B.签名算法标识
C.版本号
D.主体的公开密钥信息查看答案
试题参考答案：A
试题5
S/Key口令是一种一次性口令生产方案，它可以对抗（）
A、恶意代码木马攻击
B、拒绝服务攻击
C、协议分析攻击
D、重放攻击查看答案
试题参考答案：D
试题6
信息通过网络进行传输的过程中，存在着被篡改的风险，为了解决这一安全问题，通常采用的安全防护技术是（）
A、加密技术
B、匿名技术
C、消息认证技术
D、数据备份技术查看答案
试题参考答案：C
试题7
等级保护2.0对于应用和数据安全，特别增加了个人信息保护的要求。以下关于个人信息保护的描述中，错误的是（）。
A.应仅采集和保存业务必需的用户个人信息
B.应禁止未授权访问和使用用户个人信息
C.应允许对用户个人信息的访问和使用
D.应制定有关用户个人信息保护的管理制度和流程查看答案
试题参考答案：C
试题8
计算机系统的安全级别分为四级：D、C（C1、C2）、B（B1、B2、B3）和A。其中被称为选择保护级的是（）
A. C1
B. C2
C. B1
D. B2查看答案
试题参考答案：A
试题9
（1）is the science of hiding information. Whereas the goal of cryptography is to make data unreadable by a third party. the goal of steganography is to hide the data from a third party. In this article, I will discuss what steganography is, what purposes it serves, and will provide an example using available software.
There are a large number of steganographic （2）that most of us are familiar with (especially if you watch a lot of spy movies), ranging from invisible ink and microdots to secreting a hidden message in the second letter of each word of a large body of text and spread spectrum radio communication. With computers and networks, there are many other ways of hiding informations, such as:
Covert channels (c,g, Loki and some distributed denial-of-service tools use the Internet Control （3）Protocol, or ICMP, as the communication channel between the “bad guy”and a compromicyed system)
Hidden text within Web pages
Hiding files in “plain sight”(c,g. what better place to “hide”a file than with an important sounding name in the c:\winnt system32 directory)
Null ciphers(c,g, using the first letter of each word to form a hidden message in an otherwise innocuous text)
steganography today, however, is significantly more （4）than the example about suggest, allowing a user to hide large amounts of information within image and audio. These forms of steganography often are used in conjunction with cryptography so the information is double protected; first it is encrypted and then hidden so that an advertisement first. find the information ( an often difficult task in and of itself) and the decrypted it.
The simplest approach to hiding data within an image file is called （5）signature insertion. In this method, we can take the binary representation of the hidden data and the bit of each byte within the covert image. If we are using 24-bit color the amount and will be minimum and indiscriminate to the human eye.
（1）A、Cryptography
B、Geography
C、Stenography
D、Steganography
（2）A、methods
B、software
C、tools
D、services
（3）A、Member
B、Management
C、Message
D、Mail
（4）A、powerful
B、sophistication
C、advanced
D、easy
（5）A、least
B、most
C、much
D、less查看答案
试题参考答案：D、A、C、B、A
试题10
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
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