信息安全工程师每日一练试题（2022/10/11）

2022年10月12日来源：信管网作者:cnitpm

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信息安全工程师每日一练试题内容（2022/10/11）

试题1

在DES加密算法中，密钥长度和被加密的分组长度分别是（）
A、56位和64位
B、56位和56位
C、64位和64位
D、64位和56位
查看答案
试题参考答案：A
试题解析与讨论：www.cnitpm.com/st/2847821534.html
试题2
在缺省安装数据库管理系统MySQL后，root用户拥有所有权限且是空口令，为了安全起见，必须为root用户设置口令，以下口令设置方法中，不正确的是（）。
A.使用MySQL自带的命令mysqladmin设置root口令
B.使用setpassword设置口令
C.登录数据库,修改数据库mysql下user表的字段内容设置口令
D.登录数据库,修改数据库mysql下的访问控制列表内容设置口令
查看答案
试题参考答案：D
试题解析与讨论：www.cnitpm.com/st/389422880.html
试题3
等级保护2.0强化了对外部人员的管理要求，包括外部人员的访问权限、保密协议的管理要求，以下表述中，错误的是（）。
A.应确保在外部人员接入网络访问系统前先提出书面申请，批准后由专人开设账号、分配权限,并登记备案
B.外部人员离场后应及时清除其所有的访问权限
C.获得系统访问授权的外部人员应签署保密协议，不得进行非授权操作，不得复制和泄露任何敏感信息
D.获得系统访问授权的外部人员，离场后可保留远程访问权限

查看答案
试题参考答案：D
试题解析与讨论：www.cnitpm.com/st/5023718231.html
试题4
文件完整性检查的目的是发现受害系统中被篡改的文件或操作系统的内核是否被替换，对于Linux系统，网络管理员可使用( )命令直接把系统中的二进制文件和原始发布介质上对应的文件进行比较。
A．who
B．find
C．arp
D．cmp
查看答案
试题参考答案：D
试题解析与讨论：www.cnitpm.com/st/522785103.html
试题5
为了保护个人信息安全，规范App的应用，国家有关部门已发布了《信息安全技术移动互联网应用程序（App）收集个人信息基本规范（草案）》，其中，针对Android 6.0及以上可收集个人信息的权限，给出了服务类型的最小必要权限参考范围。根据该规范，具有位置权限的服务类型包括( )
A．网络支付、金融借贷
B．网上购物、即时通信
C．餐饮外卖、运动健身
D．问诊挂号、求职招聘
查看答案
试题参考答案：C
试题解析与讨论：www.cnitpm.com/st/5227510992.html
试题6
The modern study of symmetric-key ciphers relates mainly to the study of block ciphers and stream ciphers and to their applications. A block cipher is, in a sense, a modern embodiment of Alberti's polyalphabetic cipher: block ciphers take as input a block of （71 ）and a key, and output a block of ciphertext of the same size. Since messages are almost always longer than a single block, some method of knitting together successive blocks is required. Several have been developed, some with better security in one aspect or another than others. They are the mode of operations and must be carefully considered when using a block cipher in a cryptosystem.
The Data Encryption Standard (DES) and the Advanced Encryption Standard (AES) are( 72 )designs which have been designated cryptography standards by the US government (though DES's designation was finally withdrawn after the AES was adopted). Despite its deprecation as an official standard, DES (especially its still-approved and much more secure triple-DES variant) remains quite popular; it is used across a wide range of applications, from ATM encryption to e-mail privacy and secure remote access. Many other block ciphers have been designed and released, with considerable variation in quality. Many have been thoroughly broken. See Category: Block ciphers.
Stream ciphers, in contrast to the ‘block’type, create an arbitrarily long stream of key material, which is combined ( 73 )the plaintext bit-by-bit or character-by-character, somewhat like the one-time pad. In a stream cipher, the output( 74 )is created based on an internal state which changes as the cipher operates. That state change is controlled by the key, and, in some stream ciphers, by the plaintext stream as well. RC4 is an example of a well-known, and widely used, stream cipher; see Category: Stream ciphers.
Cryptographic hash functions (often called message digest functions) do not necessarily use keys, but are a related and important class of cryptographic algorithms. They take input data (often an entire message), and output a short fixed length hash, and do so as a one-way function. For good ones, ( 75 ) (two plaintexts which produce the same hash) are extremely difficult to find.
Message authentication codes (MACs) are much like cryptographic hash functions, except that a secret key is used to authenticate the hash value on receipt. These block an attack against plain hash functions.
（71）
A.plaintext
B.ciphertext
C.data
D.hash
（72）
A.stream cipher
B.hash function
C.Message authentication code
D.Block cipher
（73）
A.of
B.for
C.with
D.in
（74）
A.hash
B.stream
C.ciphertext
D.plaintext
（75）
A.collisions
B.image
C.preimage
D.solution
查看答案
试题参考答案：A、D、C、B、A
试题解析与讨论：www.cnitpm.com/st/4115223167.html
试题7
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8
如果对一个密码体制的破译依赖于对某一个经过深入研究的数学难题的解决，就认为相应的密码体制是（）的。
A.计算安全
B.可证明安全
C.无条件安全
D.绝对安全
查看答案
试题参考答案：B
试题解析与讨论：www.cnitpm.com/st/411494857.html
试题9
《中华人民共和国密码法》由中华人民共和国第十三届全国人民代表大会常务委员会第十四次会议于2019年10月26日通过，已于2020年1月1日起施行。《中华人民共和国密码法》规定国家对密码实分类管理，密码分为（）。
A．核心密码、普通密码和商用密码
B．对称密码、公钥密码和哈希算法
C．国际密码、国产密码和商用密码
D．普通密码，涉密密码和商用密码
查看答案
试题参考答案：A
试题解析与讨论：www.cnitpm.com/st/5222815111.html
试题10
网络流量数据挖掘分析是对采集到的网络流量数据进行挖掘，提取网络流量信息，形成网络审计记录。网络流量数据挖掘分析主要包括：邮件收发协议审计、网页浏览审计、文件共享审计、文件传输审计、远程访问审计等。其中文件传输审计主要针对（）协议。
A．SMTP
B．FTP
C．Telnet
D．HTTP
查看答案
试题参考答案：B
试题解析与讨论：www.cnitpm.com/st/5226824423.html

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