Cyber Security Jobs Cryptography and Encryption

Question 1

What does AES stand for in the context of cryptography?

Accepted Answer

Advanced Encryption Standard

Answer

AES (Advanced Encryption Standard) is a symmetric block cipher adopted by NIST in 2001 and widely used for data encryption.

Question 2

Which type of encryption uses the same key for both encryption and decryption?

Accepted Answer

Symmetric encryption

Answer

Symmetric encryption uses a single shared key for both encrypting and decrypting data, making key distribution a critical challenge.

Question 3

What is the primary purpose of a cryptographic hash function in cybersecurity?

Accepted Answer

Verifying data integrity

Answer

Hash functions produce a fixed-length digest of data, allowing verification that data has not been altered, which is central to integrity checking.

Question 4

RSA is a well-known example of which category of cryptographic algorithm?

Accepted Answer

Asymmetric encryption

Answer

RSA uses a public/private key pair, classifying it as an asymmetric (public-key) algorithm used for encryption and digital signatures.

Question 5

What is the main purpose of a digital signature in cybersecurity?

Accepted Answer

To verify the authenticity and integrity of a message

Answer

A digital signature proves that a message came from a specific sender and has not been tampered with, addressing both authenticity and integrity.

Cyber Security Jobs Practice Test