câu 1- 45

1.     General objectives of information security

• a.     All three options

• b.     Availability

• c.     Secrecy

• d.     Integrity

2.     According to Kirchoff's law, the security of the code system depends on what factors

• a.     Lock

• b.     Combine the above answers

• c.     Combine the above answers

• d.     Cryptographd

3.     System Safety Strategies

• a.     The weakest connection point, the holisticness

• b.     The weakest connection point, the holisticness

• c.     Bottleneck

• d.     Protection in depth

• e.     All answers above

4   Applications of cryptography include

• a.     Data security, information authentication, digital signature confirmation, key distribution

• a.     Encryption, information integrity, digital signature generation, lock agreement

• a.     Data encryption, hash generation, digital signatures, key management

• a.     Data security, information integrity authentication, digital signatures, and key management

5.     Ways to increase the security of the specification in the code system are

• a.     Clear text compression masks the relationship between the clear and the code, increasing the dependency between the code and the clear text

• a.     Increased dependency between the code and the explicit text

• a.     Clear Text Compression

• a.     Concealing the relationship between the plaintext and the code

6.     Factors that do not affect the security of a cryptographic system

• a.     Script length

• b.     Secret of the lock

• c.     Encryption and decryption algorithms

• d.     Computational complexity of the code system

7.     The schema of a cryptographic system with several components

• a.     3 different episodes

• b.     6 different episodes

• c.     5 different episodes

• d.     4 different episodes

8.     SKC is understood as

• a.     Asymmetric key system

• b.     Line lock code system

• c.     Symmetric key system

• d.     Classic key system

9.     PKC is understood as

• a.     Classic key system

• b.     Line lock code system

• c.     Asymmetric key system (public key system)

• d.     Symmetric key system

10.     There are several main methods for encryption and decryption

• a.     Two (symmetric key encryption, public-key encryption)

• b.     Two (symmetric key encryption, public-key encryption)

• c.     Four (symmetric key encryption, non-public encryption, hash function, line encryption)