INTRO Encryption and Decryption Quiz

What is the primary purpose of encryption?

• Data storage

• Protecting data by converting it into an unreadable format

• Accelerating data transfer

• Improving data compression

Decryption is the process of:

• Encrypting data using a public key

• Converting encrypted data back into its original format

• Deleting encrypted files

• Analyzing data for errors

Which of the following is NOT a common use of encryption?

• Securing emails

• Protecting passwords

• Compressing files

• Encrypting files for secure storage

Symmetric encryption uses:

• A pair of keys for encryption and decryption

• A single key for both encryption and decryption

• Hash functions for data encoding

• Multiple keys depending on the file size

Which of the following is an example of asymmetric encryption?

• RSA

• DES

• AES

• Blowfish

What is the key length used in DES encryption?

• 64 bits

• 128 bits

• 56 bits

• 32 bits

Data Encryption Standard (DES) is primarily used for:

• Hashing passwords

• Encrypting block data

• Wireless communications

• Secure web browsing

The replacement for DES due to its vulnerability is:

• MD5

• Triple DES (3DES)

• Caesar cipher

• XOR encryption

In DES, how many rounds of encryption are applied?

• 12

• 8

• 16

• 10

Which of the following is a limitation of DES?

• Long encryption time

• Small key size, making it vulnerable to brute-force attacks

• Unavailability of decryption methods

• High complexity for hardware implementation