"Ciphers and Privacy"

Front

What does the term 'symmetric' mean in the context of ciphers?

Back

Using the same key to write and read it.

Front

In Julius Caesar’s cipher, what letter does 'A' represent?

Back

D

Front

What is ciphertext?

Back

A random string of letters, numbers, or symbols.

Front

What is plaintext?

Back

A message in normal language.

Front

Who used a simple cipher two thousand years ago?

Back

Julius Caesar.

Front

What is a cipher?

Back

A method of transforming information to keep it secret.

Front

What is the purpose of encryption?

Back

To protect information by converting it into a secure format.

Front

What is decryption?

Back

The process of converting ciphertext back into plaintext.

Front

What is a key in cryptography?

Back

A piece of information used to encrypt or decrypt a message.

Front

What is a substitution cipher?

Back

A cipher that replaces each letter in the plaintext with another letter.