Basics of Cryptography

What is the main principle behind symmetric key cryptography?

• The requirement of a password for each encryption process.

• The main principle behind symmetric key cryptography is the use of a single shared secret key for both encryption and decryption.

• The use of multiple keys for encryption and decryption.

• The reliance on public key infrastructure for security.

Name one advantage of asymmetric key cryptography over symmetric key cryptography.

• It enables secure key exchange without prior sharing of a secret key.

• It requires less computational power than symmetric key cryptography.

• It is faster for encrypting large amounts of data.

• It uses the same key for both encryption and decryption.

In symmetric key cryptography, what is the role of the key?

• The key is used only for data storage.

• The key is used to authenticate users.

• The key is used to generate random numbers.

• The key is used to encrypt and decrypt data.

Give an example of a commonly used asymmetric encryption algorithm.

• AES

• DES

• Blowfish

• RSA

What is a potential drawback of using symmetric key cryptography?

• Key management and distribution challenges.

• No need for a secure channel for communication.

• Faster encryption and decryption speeds.

• Increased security with longer keys.