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SHIP Secure Heterogeneous Information Presentation

Marc Bezem PUT.ii.uib. SHIP Secure Heterogeneous Information Presentation. The Internet. Many servers connected to even more clients: a bewildering variety. Heterogeneity. content: data, programs, text, sound, images, video hardware: from servers to mobile phones

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SHIP Secure Heterogeneous Information Presentation

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  1. Marc Bezem PUT.ii.uib SHIPSecure Heterogeneous Information Presentation

  2. The Internet Many servers connected to even more clients: a bewildering variety

  3. Heterogeneity • content: data, programs, text, sound, images, video • hardware: from servers to mobile phones • communication: bandwidth, security,… • preferences: no/color, no/sound, braille, only the headlines, ..

  4. ``Only´´ security • encryption (low sec. – high sec.) • public/private key • signatures • trusted third party • protected against modification, redirection, …

  5. Main Goal of SHIP • Advancing the state of the art of network technology by developing a flexible framework for handling data and organizing software for heterogeneous content on heterogeneous platforms. • Or, more modestly, …

  6. Main Test Vehicle • E-learning system developed by Mughal at II/UiB • multi-media content • content-independent • secure (privacy, exams) • Prototyping extensions of this system in order to test new ideas

  7. Status per Today • Still in the initial phase (2007-2010+) • 2 PhD fellows appointed: • Paul Simon Svanberg (15.01.07), Security and Agent Logics (Sect.2.4.3) • Dag Hovland (01.04.07), Inclusion relation for XML schemas (Sect.2.4.1/2) • Vacancy for a research associate

  8. Related Activities • Collaboration with HiB: PhD fellow Adrian Rutle working on Diagram techniques for design and formalization of presentation patterns (Sect.2.4.1) • Upcoming: cooperation with Vesta

  9. Inclusion relation for XML schemas • XML: a flexible language for representing heterogeneous content • XML schemas: define valid XML documents • Dynamic Presentation: XML schemas may change • Q: which XML documents stay valid?

  10. XML schemas, ctnd • A1: test all your documents again (costly) • A2: test a syntactic inclusion relation between the old and the new schema • Problems: • Define `syntactic inclusion´ • Prove `syntactic´ implies `semantic´ inclusion • Find an algorithm to test syntactic inclusion (compare efficiency to testing all documents)

  11. Security and Agent Logics • Identification of a `Security Language´: • Abstraction mechanisms for security • Specification of security objectives • Validation wrt security objectives • Make Agent Logics a suitable framework • Simple example: if agent A knows an encrypted message, then he knows the message itself only if he also knows the key

  12. Agent Logics (ctnd) • Typical example: If A sends an encrypted message to B. How can A be sure that B has received the message? (missing key, failing communication) • Challenges: flexibility, diversity

  13. The End

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