sentence: Encryption is used to store the code in a secret way.
sentences_before: This card is protected by a secret access code. Since the code needs to be kept secret, it cannot be stored in cleartext on the card.
sentences_after: This encryption uses multiplications, divisions, and finding remainders of large prime numbers. An algorithm called RSA is often used in practice. It uses the Chinese remainder theorem.
concept_name: encryption
headings: Prime number What prime numbers are used for
categories: Number theory