Symmetric and Asymmetric Encryption

• What are the two types of encryption mentioned?

  Symmetric and asymmetric encryption
• How does asymmetric encryption function?

  It uses different keys for encryption and decryption
• What is the key feature of symmetric encryption?

  It uses the same key for encryption and decryption
• When is symmetric encryption most appropriate to use?

  When data will not be transmitted
• What is an advantage of symmetric encryption?

  The encryption algorithm runs more quickly
• How does modern encryption compare to pre-computer era encryption?

  It is many orders stronger
• What is a characteristic of asymmetric encryption algorithms?

  They involve more processing than symmetric algorithms
• How can modern encryption be used by the general public?

  Without specialist knowledge, often unknowingly
• In what scenario is asymmetric encryption commonly used?

  When exchanging sensitive data like credit card details
• When is symmetric encryption best suited?

  When the same person encrypts and decrypts
• What has the strength of encryption enabled on the Internet?

  Widespread use and support for e-commerce
• What is a consequence of modern encryption for governments?

  They struggle to crack intercepted messages
• What level of privacy does modern encryption provide individuals?

  Unprecedented levels of privacy
• What is a downside of modern encryption for communication?

  Nefarious purposes can be conducted undetected
• What is the difference between symmetric encryption, asymmetric encryption, and hashing?

  • Symmetric encryption: same key for encryption and decryption
  • Asymmetric encryption: two keys (public and private) for encryption and decryption
  • Hashing: one-way process, non-reversible, produces a fixed value
• What does encryption do to data?

  It converts data into ciphertext
• What is the purpose of hashing?

  To verify information without revealing it
• How does symmetric encryption benefit robot data storage?

  No keys need to be shared or transmitted
• What is a benefit of asymmetric encryption in robot communication?

  Only the public key needs to be shared
• How can asymmetric encryption verify the identity of a sender?

  By using the public key for encryption
• What is a limitation of hashing?

  It cannot return data to the original form
• Why is encryption useful for data transmission?

  Intercepted data cannot be decrypted without the key