試題1

以下不屬于網(wǎng)絡安全控制技術(shù)的是（）
A、防火墻技術(shù)
B、訪問控制
C、入侵檢測技術(shù)
D、差錯控制

查看答案

試題2

查看答案

試題3

查看答案

試題4

查看答案

試題5

查看答案

試題6

查看答案

試題7

查看答案

試題8

Perhaps the most obvious difference between private-key and public-key encryption is that the former assumes complete secrecy of all cry to graphic keys, whereas the latter requires secrecy for only the private key.Although this may seem like a minor distinction ,the ramifications are huge: in the private-key setting the communicating parties must somehow be able to share the (71) key without allowing any third party to learn it, whereas in the public-key setting the (72) key can be sent from one party to the other over a public channel without compromising security.For parties shouting across a room or, more realistically , communicating over a public network like a phone line or then ternet, public-key encryption is the only option.
Another important distinction is that private-key encryption sch emesuse the (73) key for both encryption and decryption, whereas public key encryption schemes use (74) keys for each operation.That is public-key encryption is inherently as ymmetri C．This asymmetry in the public-key setting means that the roles of sender and receiver are not interchangeable as they are in the private-key setting; a single key-pair allows communication in one direction only.(Bidirectional communication can be achieved in a number of ways; the point is that a single invocation of a public-key encryption scheme forces ad is tinction between one user who acts as a receiver and other users who act as senders.)。In addition, a single instance of a (75) encryption scheme enables multiple senders to communicate privately with a single receiver,in contrast to the private-key case where a secret key shared between two parties enables private communication only between those two parties.
(1) A．main
B．same
C．public
D．secret
(2) A．stream
B．different
C．public
D．secret
(3) A．different
B．same
C．public
D．private
(4) A．different
B．same
C．public
D．private
(5) A．private-key
B．public-key
C．stream
D．Hash

查看答案

試題9

查看答案

試題10

甲不但懷疑乙發(fā)給他的被人篡改，而且懷疑乙的公鑰也是被人冒充的，為了消除甲的疑慮，甲和乙決定找一個雙方都信任的第三方來簽發(fā)數(shù)字證書，這個第三方為（）
A、國際電信聯(lián)盟電信標準分部（ITU-T）
B、國家安全局（NSA）
C、認證中心（CA）
D、國家標準化組織（ISO）

查看答案