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Secure RESTful Authentication for Trusted and Untrusted Clients in Web Services

This technical document outlines the implementation of a RESTful authentication system designed to operate in both trusted and untrusted client environments. It details the methods for client authentication via MD5 hashing, user validation, and privilege checking. Key operations such as creating new appointments, editing patient information, and managing user accounts are discussed along with their SQL implementations. The document emphasizes security measures, including the usage of salted keys and hashed requests. Suitable for developers working on Emergency Medical Information Systems (EMIS).

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Secure RESTful Authentication for Trusted and Untrusted Clients in Web Services

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  1. RESTful Authentication Trusted Client Authenticate.php Web Service GET [USER,md5(PASS)] MySQL Query Database Untrusted Client Exists? GET [USER,md5(PASS)] Result XML Authkey Md5(user.md5(pass).ctrlsalt)

  2. RESTful query Trusted Client query.php web service GET method, saltedkey, params, hashed request compare request vs hash get user validate key get user privileges Untrusted Client Check trusted method Check untrusted method GET method, key, params, hashed request Do trusted operation Do untrusted operation Result XML

  3. Usecase: Timeblock 2 Trusted Space add patient Create New Appointment SQL INSERT Delete Patient SQL DELETE Delete Appointment SQL UPDATE Edit Patient Trusted Client Lock/unlock User WebService(REST) Untrusted Space Post to action log Login/logout View Visit Information Untrusted Client View user information View Patient Information

  4. Pert Chart: Timeblock 2 Rest Action Log Patient Edit 4 8 5 hrs 5 hrs Refactor Database REST Auth REST Query Screens Dr/Nurse Edit 1 2 3 6 9 5 hrs 10 hrs 20 hrs 30 hrs 5 hrs Untrusted Client Admin Edit Lock/Unlock 10 hrs 5 hrs 10 7 5 5 hrs “The Bible” 11 10 hrs

  5. “The Bible” Wiki A manual containing the standards for each element pertaining to the Emergency Medical Information System. EMIS Wiki

  6. Burn down Chart

  7. Flow Diagram

  8. : Timeblock 2

  9. : Timeblock 2

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