Principles of Information Security
Principles of Information Security
5th Edition
ISBN: 9781285448367
Author: Michael E. Whitman, Herbert J. Mattord
Publisher: Course Technology
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Chapter 2, Problem 7RQ
Program Plan Intro

Shoulder surfing:

It is a technique in which attacker gets the personal or confidential information of the victim by looking over the victim’s shoulder. This can be performed in close range and in longer range. Earlier binoculars or some similar hardware were used in longer range shoulder surfing. Now, as there is advancement in technology like hidden cameras or secret microphones make shoulder surfing easier.

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Exercise 1 Function and Structure [30 pts] Please debug the following program and answer the following questions. There is a cycle in a linked list if some node in the list can be reached again by continuously following the next pointer. #include typedef struct node { int value; struct node *next; } node; int 11_has_cycle (node *first) if (first == node *head = { NULL) return 0; first; while (head->next != NULL) { } if (head first) { return 1; } head = head->next; return 0; void test ll_has_cycle () { int i; node nodes [6]; for (i = 0; i < 6; i++) { nodes [i] .next = NULL; nodes [i].value = i; } nodes [0] .next = &nodes [1]; nodes [1] .next = &nodes [2]; nodes [2] .next = &nodes [3]; nodes [3] .next nodes [4] .next &nodes [4]; NULL; nodes [5] .next = &nodes [0]; printf("1. Checking first list for cycles. \n Function 11_has_cycle says it has s cycle\n\n", 11_has_cycle (&nodes [0])?"a":"no"); printf("2. Checking length-zero list for cycles. \n Function 11_has_cycle says it has %s…
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