(Central city) Given a set of cities, the central city is the city that has the shortest total distance to all other cities. Write a program that prompts the user to enter the number of the cities and the locations of the cities (coordinates), and finds the central city and its total distance to all other cities. Sample Run Enter the number of cities: 5 Enter the coordinates of the cities: 2.5 5 5.1 3 1 9 5.4 54 5.5 2.1 The central city is at (2.5, 5.0) The total distance to all other cities is 60.81 Class Name: Exercise08_21

How safe are the different authentication procedures?

Explain the role of cookies and sessions in web applications. How do they enhance user experience, and what security concerns should developers be aware of?

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This article describes fictional login management. List all your authentication methods. How do you feel about future password security?

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Please provide your own explanation of challenge-and-response authentication. Why is this authentication mechanism superior to the insecure password?