Encryption and Cryptography

What is the primary purpose of encryption?

• To compress data

• To convert data into a readable format

• To convert plaintext into ciphertext to prevent unauthorized access

• To delete data securely

Which of the following is a characteristic of symmetric encryption?

• Uses a pair of keys (public and private)

• Uses the same key for both encryption and decryption

• Does not require a key

• Uses a different key for encryption and decryption

Which algorithm is commonly used in symmetric encryption?

• RSA

• AES

• ECC

• DSA

In asymmetric encryption, what is the role of the public key?

• To decrypt data

• To encrypt data

• To generate a hash

• To compress data

Why is cryptography important in cybersecurity?

• It helps protect data from unauthorized access

• It ensures data integrity

• It provides authentication and non-repudiation

• All of the above

What is the purpose of a cryptographic hash function?

• To encrypt data

• To convert plaintext into ciphertext

• To take an input and return a fixed-size string of bytes

• To generate a pair of keys

Which of the following is an example of an asymmetric encryption algorithm?

• AES

• DES

• RSA

• 3DES

What is a key characteristic of asymmetric encryption?

• It is faster than symmetric encryption

• It does not require any keys

• It uses the same key for encryption and decryption

• It uses a pair of keys: one for encryption and another for decryption

Which cryptographic method is primarily used to ensure data integrity?

• Steganography

• Hash functions

• Asymmetric encryption

• Symmetric encryption

What is the main advantage of using symmetric encryption over asymmetric encryption?

• It does not require key management

• It uses a pair of keys for added security

• It is faster and requires less computational power

• It is more secure