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试卷年份2018年上半年
试题题型【单选题】
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a=17,b=2,则满足a与b取模同余的是(  )。
A.4
B.5
C.6
D.7

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相关试题

66题: 下列关于公钥密码体制说法不正确的是(  )。
A.在一个公钥密码体制中,一般存在公钥和私钥两个密钥
B.公钥密码体制中仅根据密码算法和加密密钥来确定解密密钥在计算上是可行的
C.公钥密码体制中仅根据密码算法和加密密来确定解密密在计算上是不可行的
D.公钥密码体制中的私钥可以用来进行数字签名
答案解析与讨论:www.cnitpm.com/st/389898585.html

67题: SM3密码杂凑算法的消息分组长度为(  )比特。
A.64
B.128
C.512
D.1024
答案解析与讨论:www.cnitpm.com/st/3899024824.html

68题: 如果破译加密算法所需要的计算能力和计算时间是现实条件所不具备的,那么就认为相应的密码体制是(  )。
A.实际安全
B.可证明安全
C.无条件安全
D.绝对安全
答案解析与讨论:www.cnitpm.com/st/3899110708.html

70题: 利用公开密钥算法进行数据加密时,采用的方式是(  )。
A.发送方用公开密钥加密,接收方用公开密钥解密
B.发送方用私有密钥加密,接收方用私有密钥解密
C.发送方用公开密钥加密,接收方用私有密钥解密
D.发送方用私有密钥加密,接收方用公开密钥解
答案解析与讨论:www.cnitpm.com/st/3899312903.html

71题: 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
答案解析与讨论:www.cnitpm.com/st/389944612.html