Security Quiz -01

What is the main disadvantage of symmetric key cryptography?

• Inefficient for large amounts of data

• Key Management

• Lack of Encryption

• High Memory Usage

In Diffie-Hellman key exchange, what values do the partners share publicly?

• Prime modulus and a base

• Private exponents only

• Public Keys only

• Encrypted messages

Which algorithm is commonly used for hashing passwords?

• AES

• SHA-256

• RSA

• Diffie-Hellman

What is the most preferable method to prevent replay attacks?

• Using timestamps

• Implementing firewalls

• Using longer keys

• Using Nonces

Why is padding added in RSA encryption?

• To reduce the size of the message

• To make encryption deterministic

• To avoid chosen plaintext attack

• To allow decryption without a key

Why was the use of RSA in TLS discouraged for key exchange?

• Lack of forward secrecy

• Inefficiency in computation

• Complexity of setup

• Requirement of large memory

What kind of encryption does TLS 1.3 primarily rely on to ensure forward secrecy?

• RSA-based encryption

• Diffie-Hellman key exchange (DHE)

• Elliptic Curve Cryptography

• AES-GCM encryption

What prevents double-spending in Bitcoin?

• Users must manually confirm each transaction to avoid double-spending.
• A central authority verifies all transactions.
• The blockchain and consensus mechanism prevent double-spending in Bitcoin.
• The use of smart contracts prevents double-spending.

What's a mixer in Cryptocurrencies?

• A mixer is a service that enhances privacy by blending cryptocurrency transactions.
• A mixer is a hardware device for mining cryptocurrencies.
• A mixer is a trading platform for cryptocurrencies.
• A mixer is a type of cryptocurrency wallet.

What is the primary purpose of a digital signature?

• To encrypt data

• To verify the authenticity of a message

• To compress files

• To generate random keys