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Representation of Trust Model using RDBMs

Representation of Trust Model using RDBMs. Priyank Sharma Colorado State University. The Trust Model. The notion of trust plays a crucial role for the proper formulation of security policies.

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Representation of Trust Model using RDBMs

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  1. Representation of Trust Model using RDBMs Priyank Sharma Colorado State University

  2. The Trust Model • The notion of trust plays a crucial role for the proper formulation of security policies. • A trust management system is a comprehensive framework designed to facilitate the spec., analysis, and management of trust relationship. • This model proposed trust to be represented using a vector of 3 values: Knowledge, Experience, Recommendation. - by Sudip Chakraborty

  3. Trust QL • In order to use Trust Management System, a Trust Query Language is developed. • Query examples: CREATE ENTITY {entity_name} ; SELECT TRUST BETWEEN E1 AND E2 CONTEXT { context_name} POLICY { policy_name}

  4. RDBMS Implementation(1) • In order to these query to be run, they are transformed into corresponding database operation. • Like for query: CREATE ENTITY {entity_name} ; Corresponding database operation should be: INSERT INTO ENTITY {entity_name}; • To implement these sort of operation a database is created with tables like ENTITY, CONTEXT, TRUST, KNOWLEDGE etc.

  5. RDBMS Implementation(2) • Database is already prepared. • We need a compiler that maps these trust query into database operations. • Approach should be to prepare the Lexical analyzer first, for token generation, and then during parsing an intermediate form (which is nothing but database operation) are generated and applied on the database.

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