System development: It is a collection of activities that is used in order to create an information system . The activities that are done during system development are called as phases and the set of phases is known as system development life cycle. There are five phases in system development process. They are: Planning – In this phase, all the requirements and information are gathered from the customer. Analysis – This phase is used to break down the deliverables into detailed business requirements. Design – In this step, the requirements gathered are used to develop the application or a product. Implementation – Here, all the components of the application is implemented in this phase. Support and security – This phase is to offer ongoing assistance for the information system.

Question

In the past, encryption and decryption were mostly done by substitution and permutation of letters in a text message. study those classic cryptographic schemes Then, develop an automatic cipher using Javascript The cipher should be able to perform the following tasks: generate keys encrypt a given plaintext message with a key selected from the list of keys generated decrypt a given ciphertext message with a known cipher key

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Question

Chapter 11, Problem 42SG

Program Plan Intro

System development:

It is a collection of activities that is used in order to create an information system.

The activities that are done during system development are called as phases and the set of phases is known as system development life cycle.

There are five phases in system development process. They are:

Planning – In this phase, all the requirements and information are gathered from the customer.

Analysis – This phase is used to break down the deliverables into detailed business requirements.

Design – In this step, the requirements gathered are used to develop the application or a product.

Implementation – Here, all the components of the application is implemented in this phase.

Support and security – This phase is to offer ongoing assistance for the information system.

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