What is cryptography?

The practice of secure communication in the presence of third parties

The study of ancient civilizations

A type of computer programming language

The art of painting

Which encryption algorithm is widely used for secure online communication?

RSA

AES

DES

MD5

What is a key in cryptography?

A secret code used to encrypt messages

A physical object used to unlock doors

A mathematical equation

A type of computer virus

Which of the following is an example of symmetric encryption?

AES

RSA

Diffie-Hellman

Blowfish

What is a digital signature used for in cryptography?

To verify the authenticity and integrity of a message

To encrypt sensitive information

To generate random numbers

To protect against malware

What is a brute force attack in cryptography?

An attack that tries all possible combinations of keys to decrypt encrypted data

An attack that targets physical security measures

An attack that exploits software vulnerabilities

An attack that uses social engineering techniques

What is the purpose of a nonce in cryptography?

To add randomness and uniqueness to cryptographic protocols

To encrypt sensitive information

To generate random numbers

To authenticate users

Which of the following is a symmetric key encryption algorithm?

DES

RSA

Diffie-Hellman

Blowfish

What is the purpose of a hash function in cryptography?

To generate a fixed-size output from an arbitrary input

To encrypt sensitive information

To authenticate users

To add randomness to cryptographic protocols

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