Common Cryptography Techniques in Use

Question 1

Which of the following is a widely used symmetric encryption algorithm?

A) RSA
B) ECC
C) AES
D) DSA

Answer 1

C) AES

Question 2

Which cryptographic technique is primarily used for securing email communication in the UK?

A) PGP (Pretty Good Privacy)
B) DES (Data Encryption Standard)
C) SHA-256 (Secure Hash Algorithm)
D) Blowfish

Answer 2

A) PGP (Pretty Good Privacy)

Question 3

What does the acronym ‘RSA’ stand for in cryptography?

A) Rivest-Shamir-Adleman
B) Randomized Security Algorithm
C) Robust Security Application
D) Reliable Secure Algorithm

Answer 3

A) Rivest-Shamir-Adleman

Question 4

Which hashing algorithm is recommended by the UK’s National Cyber Security Centre (NCSC) for ensuring data integrity?

A) MD5
B) SHA-1
C) SHA-256
D) RC4

Answer 4

C) SHA-256

Question 5

Elliptic Curve Cryptography (ECC) is known for:

A) Being faster than symmetric encryption algorithms
B) Providing security with smaller key sizes compared to other algorithms
C) Being outdated and insecure
D) Only being used for hashing

Answer 5

B) Providing security with smaller key sizes compared to other algorithms

Question 6

Which of the following encryption methods is considered outdated and insecure?

A) AES
B) RSA
C) DES
D) ECC

Answer 6

C) DES

Question 7

What is the primary purpose of a digital signature in cryptography?

A) To encrypt data for secure transmission
B) To compress data to save storage space
C) To verify the authenticity and integrity of a message
D) To generate random numbers for cryptographic operations

Answer 7

C) To verify the authenticity and integrity of a message

Question 8

Which of the following is an example of asymmetric encryption?

A) AES
B) RSA
C) DES
D) Blowfish

Answer 8

B) RSA

Question 9

TLS (Transport Layer Security) primarily uses which type of cryptography to establish a secure connection?

A) Symmetric cryptography only
B) Asymmetric cryptography only
C) A combination of both symmetric and asymmetric cryptography
D) Hashing algorithms only

Answer 9

C) A combination of both symmetric and asymmetric cryptography

Question 10

Which cryptographic technique is used to ensure data integrity by producing a unique fixed-size string from input data?

A) Symmetric encryption
B) Asymmetric encryption
C) Hashing
D) Key exchange

Answer 10

C) Hashing

Question 11

Which encryption algorithm is commonly used in securing Wi-Fi networks?
A) RSA
B) WPA2 (using AES)
C) ECC
D) MD5

Answer 11

B) WPA2 (using AES)

Question 12

Which protocol is often used for secure web browsing in the UK?

A) HTTP
B) FTP
C) SMTP
D) HTTPS

Answer 12

D) HTTPS

Question 13

In cryptography, what does the term ‘key exchange’ refer to?

A) Encrypting data with a symmetric key
B) Decrypting data with a public key
C) The process of sharing encryption keys between parties
D) Hashing a message for integrity

Answer 13

C) The process of sharing encryption keys between parties

Question 14

Which of the following cryptographic protocols is designed to provide secure email services?

A) SSH
B) S/MIME
C) FTP
D) Telnet

Answer 14

B) S/MIME

Question 15

What is the primary advantage of using elliptic curve cryptography (ECC) over RSA?

A) ECC is faster than RSA for all operations
B) ECC requires smaller key sizes to achieve similar security levels as RSA
C) ECC is older and more trusted than RSA
D) ECC uses symmetric keys

Answer 15

B) ECC requires smaller key sizes to achieve similar security levels as RSA

Question 16

Which cryptographic method is specifically designed for ensuring confidentiality and integrity of data at rest?

A) Transport Layer Security (TLS)
B) Secure Shell (SSH)
C) Full Disk Encryption (FDE)
D) Pretty Good Privacy (PGP)

Answer 16

C) Full Disk Encryption (FDE)

Question 17

What does the term ‘nonce’ refer to in cryptographic operations?

A) A symmetric key used for encryption
B) A random or pseudo-random number used only once
C) A hashing algorithm
D) A digital certificate

Answer 17

B) A random or pseudo-random number used only once

Question 18

Which of the following is a common use of cryptographic hash functions?

A) Encrypting emails
B) Verifying file integrity
C) Exchanging keys
D) Generating public and private keys

Answer 18

B) Verifying file integrity

Question 19

What is the main purpose of a Public Key Infrastructure (PKI)?

A) To generate symmetric keys for encryption
B) To securely manage digital certificates and public-key encryption
C) To hash data for integrity
D) To provide a platform for secure password storage

Answer 19

B) To securely manage digital certificates and public-key encryption

Question 20

Which cryptographic technique is used in blockchain technology to ensure data integrity?

A) Symmetric encryption
B) Asymmetric encryption
C) Digital signatures
D) Hashing

Answer 20

D) Hashing