the entropy of the following systems and order them according to increasing security (a) A 6 digit PIN code with exactly 5 different numbers (b) A 6 digit PIN code with exactly 4 different numbers (c) A 9 character password with lower- and upper-case letters and numbers, where all the numbers are at the end. (d) A passface scheme with four 5x5 grids and three 6x6 grids, each containing 1 face for recognition (e) A combination of the passface and DejaVu system with six 5x5 grids. On each of the first 3 grids there is 1 face to recognize and on each of the last 3 grids there are 2 faces to recognize ----------------------- Thank's Abdulrahim Taysir
the entropy of the following systems and order them according to increasing security (a) A 6 digit PIN code with exactly 5 different numbers (b) A 6 digit PIN code with exactly 4 different numbers (c) A 9 character password with lower- and upper-case letters and numbers, where all the numbers are at the end. (d) A passface scheme with four 5x5 grids and three 6x6 grids, each containing 1 face for recognition (e) A combination of the passface and DejaVu system with six 5x5 grids. On each of the first 3 grids there is 1 face to recognize and on each of the last 3 grids there are 2 faces to recognize ----------------------- Thank's Abdulrahim Taysir
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Question
Calculate the entropy of the following systems and order them according
to increasing security
(a) A 6 digit PIN code with exactly 5 different numbers
(b) A 6 digit PIN code with exactly 4 different numbers
(c) A 9 character password with lower- and upper-case letters and numbers, where all the numbers are at the end.
(d) A passface scheme with four 5x5 grids and three 6x6 grids, each containing 1 face for recognition
(e) A combination of the passface and DejaVu system with six 5x5 grids. On each of the first 3 grids there is 1 face to recognize and on each of the last 3 grids there are 2 faces to recognize
-----------------------
Thank's
Abdulrahim Taysir
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