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Cyber Security

Total questions: 14

Worksheet time: 14mins

Name
Class
Date
1.

This is a type of cipher that replaces plaintext letters with other letters to make the cipher.

a)

substitution

b)

transposition

c)

obfuscation

d)

masking

2.

This is a type of cipher that rearranges plaintext letters to create the cipher.

a)

substitution

b)

transposition

c)

obfuscation

d)

masking

3.

This is a type of cipher encrypts plaintext one bit at a time.

a)

substitution

b)

transposition

c)

stream

d)

block

4.

This is a type of cipher takes a fixed length of plaintext and encrypts in into cypher text in one chunk.

a)

substitution

b)

transposition

c)

stream

d)

block

5.

This is a encryption algorithm uses the same key for encryption and decryption.

a)

substitution

b)

transposition

c)

symmetric

d)

asymmetric

6.

This is a encryption algorithm uses the one key for encryption and another for decryption.

a)

substitution

b)

transposition

c)

symmetric

d)

asymmetric

7.

This is asymmetric algorithm provides an electronic key exchange method to share the secret key.

a)

Diffie-Hellman

b)

ECC (Elliptic Curve Cryptography)

c)

AES (Advance Encryption Standard)

d)

WEP (Wired Equivalent Privacy)

8.

This 128 bit block cipher encryption algorithm is the one the US government uses to protect classified information.

a)

Diffie-Hellman

b)

ECC (Elliptic Curve Cryptography)

c)

AES (Advance Encryption Standard)

d)

WEP (Wired Equivalent Privacy)

9.

Which of the following protocols does NOT use asymmetric key algorithms.

a)

Secure Socket Layer (SSL)

b)

AES (Advanced Encryption Standard)

c)

Secure Shell (SSH)

10.

Term for concealing sensitive data inside of another file.

a)

masking

b)

steganography

c)

watermarking

d)

obfuscation

11.

Term for replacing sensitive information with a fake version.

a)

masking

b)

steganography

c)

watermarking

d)

obfuscation

12.

Term for technology that protects software from unauthorized modification.

a)

masking

b)

steganography

c)

watermarking

d)

obfuscation

13.

This is term describes the number of bits it takes to store a key.

a)

key management

b)

key length

c)

key space

d)

key log

14.

This is term describes the number of possibilities that a particular key can generate.

a)

key management

b)

key length

c)

key space

d)

key log