Which of the following statements about cyberlockers is TRUE? Select one: a. Cyberlockers are specialised encrypted databases used by corporations to store highly sensitive data. b. Cyberlockers allow users to upload and share files to and from secure online storage sites. c. Cyberlockers are a form of malware used by hackers to encrypt people's files in order to extract ransom for their decryption. d. Cyberlockers provide end-to-end encryption of traffic between routers.