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
正确答案及解析
正确答案
解析
本题考查密码体制安全性分类。
衡量密码体制安全性的基本准则有以下三种:(1)计算安全的: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满足计算安全性的。这意味着强力破解证明是安全的,即实际安全。(2)可证明安全的: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满足可证明安全性的。这意味着理论保证是安全的。(3)无条件安全的:如果假设攻击者在用于无限计算能力和计算时间的前提下,也无法破译加密算法,就认为相应的密码体制是无条件安全性的。这意味着在极限状态上是安全的。故本题选B。
包含此试题的试卷
你可能感兴趣的试题
Advancements in ( )have contributed to the growth of the automotive industry through the creation and evolution of self-driving vehicles.
-
- A.Artificial Intelligence
- B.Cloud Computing
- C.Internet of Things
- D.Big Data
- 查看答案
In project human resource management , ( )is not a source of power for the project manager.
-
- A.referent power
- B.expert power
- C.reward power
- D.audit power
- 查看答案
At the project establishment stage , the feasibility study mainly includes techinical feasibility analysis , ( ), operation environment feasibility analysis and other aspects of feasibility analysis.
-
- A.detail feasibility analysis
- B.opportunity analysis
- C.economic feasibility analysis
- D.risk analysis
- 查看答案
( )is a grid that shows the project resources assigned to each work package.
-
- A.Stakeholder engagement assessment matrix
- B.Requirements traceability matrix
- C.Probability and impact matrix
- D.Responsibility assignment matrix
- 查看答案
Xinhua News Agency reported in January 2022,Chian will further promote the developmet of a digital economy during the 14th Five-Year Plan eriod(2021-2025). The plan also emphasized industrial ( )transformation.
-
- A.digital
- B.networking
- C.intelligentize
- D.informatization
- 查看答案