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Written by Administrator
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Thursday, 09 July 2009 08:54 |
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Page 13 of 17 Functional Design Analysis and PlanningDuring this phase System Design Specifications / software requirements come from three models: - Informational model Dictates the type of information to be processed and how it will be processed
- Functional model Outlines the tasks and functions that the application needs to carry out
- Behavioral model Explains the states that the application will be in during and after specific transitions take place
Whereas, system security requirements can be derived from several different sources: - Functional needs of the system or application
- National, international, or organizational standards and guidelines
- Export restrictions
- Sensitivity level of data being processed (militarily strategic data versus private-sector data)
- Relevant security policies
- Cost/benefit analysis results
- Required level of assurance to achieve the targeted security level rating
- Are authentication and authorization necessary
- Is encryption needed
- Will the product need to interface with other systems?
- Will the product be directly accessed via the Internet?
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Last Updated on Friday, 28 August 2009 05:04 |