Argument: Alice talking to Bob
{"Image DocumentName": "Argument: Alice talking to Bob", "Image ImageDescription": "Second message. Enciphered using key only she, Cathy knows. So Cathy enciphered it. Response to first message. As r1 in it matches r1 in first message. Third message. Alice knows only Bob can read it. As only Bob can derive session key from message. Any messages enciphered with that key are from Bob. June 1, Computer Security: Art and Science. \u00a9 Matt Bishop.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}