220 CEH M20 Cryptography

Which of the following algorithms is an example of symmetric encryption?

• RSA

• AES

• ECC

• DSA

What is the main purpose of hashing in cryptography?

• Encrypt data for confidentiality

• Generate encryption keys

• Ensure data integrity

• Authenticate users

In blockchain technology, which cryptographic method is primarily used to ensure the immutability of data blocks?

• Symmetric encryption

• Hashing

• Asymmetric encryption

• Digital signatures

Which of the following is a characteristic of asymmetric encryption?

• It uses a single key for both encryption and decryption

• It is faster than symmetric encryption

• It uses a public and a private key

• It does not require key exchange

How does blockchain achieve trust and transparency in a distributed system?

• By using centralized control

• By encrypting all transactions

• By using consensus mechanisms and cryptographic hashes

• By avoiding cryptographic algorithms