section_path: Techniques to improve privacy/Encryption
section_name: Encryption
paragraph_text: Encryption
  
  Individuals can encrypt e-mails via enabling either two encryption protocols, S/MIME, which is built into companies like Apple or Outlook and thus most common, or PGP. The Signal messaging app, which encrypts messages so that only the recipient can read the message, is notable for being available on many mobile devices and implementing a form of perfect forward secrecy. Signal has received praise from whistleblower Edward Snowden. Encryption and other privacy-based security measures are also used in some cryptocurrencies such as Monero and ZCash.