Encryption and Cryptography Quiz (Multiple Choice)

In the Caesar Cipher, what does the term 'plaintext' refer to?

• The encrypted message

• The original, unencrypted message

• The encryption key

• The decryption process

Why are symmetric encryption systems potentially vulnerable?

• They are too slow

• They require multiple keys

• The key exchange process can be intercepted

• They only work for short messages

What makes the Advanced Encryption Standard (AES) secure?

• It uses multiple keys

• Computers cannot realistically guess the key by brute force

• It works only for small amounts of data

• It is completely unbreakable

What problem does 'hashing with salt' solve in password protection?

• It makes passwords longer

• It prevents users from forgetting passwords

• It ensures that identical passwords produce different hash values

• It increases password complexity

What is a key limitation of the Caesar Cipher?

• It only works in English

• It is too complex to understand

• It has only 25 possible keys, making it easy to crack

• It requires specialised software

In the context of healthcare systems, what does 'data in transit' refer to?

• Data stored on physical servers

• Data moving between different systems

• Data permanently archived

• Data waiting to be processed

What makes the RSA algorithm significant in cryptography?

• It uses a single key for encryption

• It allows safe key exchange using different keys

• It works only for small messages

• It is completely unbreakable

What is the primary challenge with storing passwords securely?

• Remembering complex passwords

• Preventing users from writing passwords down

• Ensuring passwords cannot be reverse-engineered

• Creating universally acceptable password rules

What is a potential weakness in basic password hashing?

• Passwords are stored in plaintext

• Users with identical passwords create identical hash values

• Hashing is too slow

• It requires constant internet connection

How does adding 'salt' improve password security?

• It makes passwords longer

• It ensures different hash values for identical passwords

• It prevents password forgetting

• It increases typing complexity