Term2-Week 2-Session 2:Encryption

Which of the following best describes symmetric encryption?

• It uses one key for encryption and a different key for decryption.

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

• It uses a public key to encrypt and a private key to decrypt.

• It uses no keys at all for encryption.

What is a major disadvantage of symmetric encryption?

• It is slower than asymmetric encryption.

• It requires two keys, which increases complexity.

• It requires sharing the secret key, which can be a security risk.

• It can only be used for encrypting small amounts of data.

In asymmetric encryption, which key is used to encrypt a message?

• Private key

• Public key

• Symmetric key

• Session key

Which encryption method is typically faster when encrypting large amounts of data?

• Asymmetric encryption

• Symmetric encryption

Which encryption method two different keys are used: a public key for encryption and a private key for decryption?

• Asymmetric encryption

• Symmetric encryption

Why is asymmetric encryption often used for secure key exchange in systems like SSL/TLS?

• Because it is faster than symmetric encryption.

• Because it eliminates the need for a shared secret key.

• Because it uses the same key for encryption and decryption.

• Because it doesn't require any keys.

In asymmetric encryption, which key is kept private and never shared?

• Public key

• Private key

• Symmetric key

• Decryption key

Which of the following is an example of asymmetric encryption?

• AES

• RSA

• DES

• Blowfish

Which of the following is an example of symmetric encryption?

• Blowfish

• ECC (Elliptic Curve Cryptography)

• RSA (Rivest-Shamir-Adleman)

What is a common use of symmetric encryption in real-world applications?

• Encrypting messages in secure email communication.

• Digital signatures for verifying documents.

• Secure key exchange between parties.

• Encrypting large files or data efficiently.