A hint of existing information systems analysis

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Piers Lynch
9 years ago
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1 systems analysis 2nd year PhD Student at Co-Founder of Master SCCI 10th Birthday, 12th September 2011

2 1A + 2A Engineering studies 3A Master SCCI Doctorate in virology Startup company in IS reengineering Existing

3 One particular interest for existing systems analysis : Handling complex, very informative, human-related systems No documentation From a practical point of view, standard methods & tools do not suce. Two activities: Fundamental research in computer virology Co-founding of a startup company,, specialized in system reengineering.

5 INRIA Nancy - Grand Est, Team CARTE A study of the ambiguous nature of software (particularly malware), because of: Implementation language (assembler x86) Mass, execution context dependency Self-modication/self-organization (capability of a program to modify/reorganize itself at execution) Programming tricks (security aw exploits, deep system features, designer experience). Ideally, we want to recover from binary les (e.g. compiled programs) a control ow graph (also called owchart) upon which we base malware detection.

6 Basic rules The player moves foward and collects objects. The only possible solution (execution trace): Rule #1 Control flow graph 0

7 Doors Two possible solutions: Door: when the player has the key, he must pass the door. Otherwise, he goes in the opposite direction. Door direct branching Rule #2 Control flow graph 0 With key Without key

8 More sophisticated rules? Teleporter: the player moves to a cell depending on the objects he has collected. Teleporter indirect branching Rule #3 Control flow graph 0... L Rule #4 Trap: makes some walls move, depending on the objects he has collected Trap self-modification......

9 Managing what is unexpected Rule #0 What if objects were appearing/disappearing through time?

Emerging startup company founded by Patrice (20 years engineering & reengineering experience) and in Nancy. Laureate of Entreprendre 2011 in emergence category.

11 Emerging startup company founded by Patrice (20 years engineering & reengineering experience) and in Nancy. Laureate of Entreprendre 2011 in emergence category. uses internal software/document reengineering and applied software engineering methodologies to provide an enlightenment to its client. Personal contribution: R&D management. KW: High Tech - Professionalism - Performance Comprendre pour mieux construire

12 Materials What kind of system? Hardware, software, human resources, industrial process Any organized set which regroup, classify, compute and broadcast on a given environment. What tools? An ontological schema: a schema that classies and gives semantics to by the mean of objects and relations between objects (implemented in Workshop). Automatic shape recognition (implemented as a module of Workshop). Research-oriented languages (Lisp, Prolog, OCaml, F#), compiler compilers, nite state automata.

13 Ontological schema: example

14 (in French)

15 To conclude One passion, two activities. Cryptography & reengineering: dierent goals but same spirit (reengineering system cryptanalysis). Master SCCI: excellent culture of scientic research, system administration and security business.

16 Questions Thank you for your attention. Questions? Contact: