信息安全工程师上午题英文题汇总

Securing network infrastructure is like

（

C

）

possible en points of attacks on a country by

deploying

appropriate

defense.

Computer

security

is

more

like

providing

means

to

（

D

）

a

single

PC against outside intrusion. The former is better and practical to protect the civilians from

getting

exposed

to

the

attacks.

（

D

）

attempt to

secure

the

access

to individual computers

…

the

network

itself-thereby

protecting

the

computers

and

other

shared

resources

such

as

printers,

network-attached storage connected by the network. Attacks could be stopped at their en points

before they spread. As opposed to this, in computer security the measures taken are focused on

securing individual computer hosts. A computer host whose security is compromised is likely to

infect

other

hosts

connected

to

a

potentially

（

B

）

.

A

computer

host's

security

is

vulnerable

to users with higher

（

C

A. assuring

B. guarantee

C. securing

D. proving

A. ensure

B. keep

C. support

D. protect

A. The attack means

B. The attack target

cyber security

preventive measures

A. Secure network

B. unsecured network

C. Botnet

D. Vulnerability Network

A. access mechanism

B. Secure access

C. access privileges

D.

access means

）

to those hosts.

Much of the theoretical work in cryptography concerns cryptographic primitives algorithms with

basic cryptographic properties - and their relationship to other cryptographic problems. More

complicated

cryptographic

tools

are

then

built

from

these

basic

primitives.

Complex

functionality

in

an

application

must

be

built

in

using

combinations

of

these

algorithms

and

assorted

protocols.

Such combinations

are called

（

B

）

and

it is they

which users actually encounter. Examples

include PGP and its variants, ssh, SSL/TLS, all PKIs,

（

C

）

, etc For example, a

（

B

）

is

function intended to be easy to compute but hard to invert.

But note that, in a

very general

sense,

for

any cryptographic application

to be secure

(if based

on computational feasibility assumptions) one-way functions must exist. However, if one-way

functions

exist,

this

implies

that

（

D

）

≠

NP.

Since

the

P

versus

NP

problem

is

currently

unsolved,

it is not known if one-way functions really do exist. For instance, if one way functions exist,

then secure pseudorandom generators and secure pseudorandom functions exist.

Other

（

A

）

include the encryption algorithms themselves, one-way permutations, trapdoor

permutations, etc.

A. Password base

B. cryptosystems

C. Principles of cryptography

D. Equipment system

A. Certification

B. Digest Summary

C. digital signatures

D. Identification

A. Hash function

B. one-way function

C. Bidirectional function

D. Power function

A. NPC

B. N

C. NP

D. P

A. cryptographic primitives

B. Principles of cryptography

C. cryptosystems

D. Password base