Public-key encryption: Encryption is a mechanism in which a message or information is encoded in such a manner that only authorized parties can access it. A public key encryption has two keys that are public key and private key. Public key is used to encrypt the messages and private key is used to keep secret and it is also required to decrypt the messages.

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7. Long-Distance CallsA long-distance provider charges the following rates for telephone calls: Rate Category Rate per MinuteDaytime (6:00 a.m. through 5:59 p.m.) $0.07Evening (6:00 p.m. through 11:59 p.m.) $0.12Off-Peak (midnight through 5:59 a.m.) $0.05Write a GUI application that allows the user to select a rate category (from a set of radio buttons), and enter the number of minutes of the call into an Entry widget. An info dialog box should display the charge for the call.

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Chapter 4, Problem 48CRP

Program Plan Intro

Public-key encryption:

Encryption is a mechanism in which a message or information is encoded in such a manner that only authorized parties can access it.

A public key encryption has two keys that are public key and private key. Public key is used to encrypt the messages and private key is used to keep secret and it is also required to decrypt the messages.

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7. Long-Distance CallsA long-distance provider charges the following rates for telephone calls: Rate Category Rate per MinuteDaytime (6:00 a.m. through 5:59 p.m.) $0.07Evening (6:00 p.m. through 11:59 p.m.) $0.12Off-Peak (midnight through 5:59 a.m.) $0.05Write a GUI application that allows the user to select a rate category (from a set of radio buttons), and enter the number of minutes of the call into an Entry widget. An info dialog box should display the charge for the call.

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