November 1, 2004Introduction to Computer Security ©2004 Matt Bishop Slide #8-54 Example: Confidentiality Take p = 7, q = 11, so n = 77 and (n) = 60 Alice chooses e = 17, making d = 53 Bob wants to send Alice secret message HELLO (07 04 11 11 14) –07 17 mod 77 = 28 –04 17 mod 77 = 16 –11 17 mod 77 = 44 –14 17 mod 77 = 42 Bob sends 28 16 44 44 42
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