Fundamentals of Cryptography Quiz

Which of the following best describes symmetric key cryptography?

• Uses a pair of keys: one for encryption and one for decryption

• Uses the same key for both encryption and decryption

• Does not use any keys

• Uses a public key for encryption and a private key for decryption

Which algorithm is commonly used for asymmetric key cryptography?

• AES

• DES

• RSA

• SHA-256

What is the main purpose of a hash function in cryptography?

• To encrypt data

• To compress data

• To produce a fixed-size output from variable-length input

• To generate public and private keys

Which of the following is NOT a property of a good cryptographic hash function?

• Pre-image resistance

• Collision resistance

• Deterministic output

• Easy to reverse

In digital signatures, what is used to sign a message?

• The sender's public key

• The sender's private key

• The receiver's public key

• The receiver's private key

Which of the following is a primary function of Public Key Infrastructure (PKI)?

• Generating random numbers

• Managing digital certificates

• Compressing files

• Encrypting hard drives

Which cryptographic protocol is commonly used to secure web traffic?

• FTP

• HTTP

• SSL/TLS

• SMTP

What is the main advantage of asymmetric key cryptography over symmetric key cryptography?

• Faster encryption and decryption

• No need to share secret keys securely

• Uses less computational power

• Always produces smaller ciphertext

Which of the following is an example of a symmetric key algorithm?

• RSA

• ECC

• AES

• DSA

What does the term "collision" mean in the context of hash functions?

• Two different inputs produce the same hash output

• The hash function fails to produce an output

• The hash output is always unique

• The hash function is reversible