Download Formal Methods for Components and Objects: 9th International by David von Oheimb, Sebastian Mödersheim (auth.), Bernhard K. PDF

By David von Oheimb, Sebastian Mödersheim (auth.), Bernhard K. Aichernig, Frank S. de Boer, Marcello M. Bonsangue (eds.)

The concentration in improvement methodologies of huge and intricate software program platforms has switched within the final twenty years from sensible matters to structural concerns; this holds for either the object-oriented and the newer component-based software program engineering paradigms. Formal equipment were utilized effectively to the verification of medium-sized courses in protocol and layout for rather many years. even if, their program to the improvement of enormous structures calls for extra emphasis on specification, modeling and validation thoughts helping the recommendations of reusability and modifiability, and their implementation in new extensions of latest programming languages like Java. This cutting-edge survey provides the result of the ninth Symposium on Formal equipment for elements and items, held in Graz, Austria, in November/December 2010. the quantity includes 20 revised contributions submitted after the symposium through audio system from all of the following ecu IST tasks: the FP7-IST venture AVANTSSAR on automatic validation of belief and safety of service-oriented architectures; the FP7-IST venture install on business deployment of complex method engineering tools for top productiveness and dependability; the ESF-COST motion IC0701 on formal verification of object-oriented software program; the FP7-IST undertaking HATS on hugely adaptable and reliable software program utilizing formal types; the FP7-SST undertaking INESS on an built-in ecu railway signalling approach; the FP7-IST undertaking MADES on a model-driven method of increase the present perform within the improvement of embedded structures; the FP7-IST venture MOGENTES on model-based new release of checks for liable embedded structures; in addition to the FP7-IST venture MULTIFORM on built-in multi-formalism software help for the layout of networked embedded keep watch over systems.

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Additional info for Formal Methods for Components and Objects: 9th International Symposium, FMCO 2010, Graz, Austria, November 29 - December 1, 2010. Revised Papers

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G -> isOwner (? F )) { Actor * - >* S : requestAccess (F ); % before the decision is received , access rights could have changed ... S * - >* Actor : ? Decision ; assert can_access_file : Decision = grantedAccess (F ); } } } body { % of Environment % for the concrete access examples : m1 -> isManager ; g1 -> contains ( e1 ); g1 -> contains ( e2 ); g2 -> contains ( e3 ); g1 -> isOwner ( f1 ); g2 -> isOwner ( f2 ); any M. Session (M , centralServer ); new Employee (e1 , centralServer ); new Employee (e2 , centralServer ); % new Employee (e3 , centralServer ); } } % M may be dishonest !

For each reception RCV (m) in M we generate an ASLan transition τ having only the fact iknows(σ −1 (m)) in its RHS. We note that σ −1 (m) is well defined, since every message m received by p is trivially reachable by her. For each emission SN D(m) in M we generate an ASLan transition τ having only the fact iknows(σ −1 (m)) in its LHS. Again we note here that every message m sent by the mediator M has been already deduced by him and thus σ −1 (m) is well defined. 38 Y. A. Mekki, and M. Rusinowitch We introduce the variable renaming functions {V N amej }1≤j≤length(c) to distinguish whether a value has been assigned to the variable Xm or not yet in a transition.

Protocol insecurity with finite number of sessions is NP-complete. In: CSFW, p. 174. IEEE Computer Society, Los Alamitos (2001) A Formal Security Specification Language for Distributed Systems 21 ASLan++ Specification Example specification example channel_model CCM entity Environment { types file < text ; % a group is an agent set cookie < text ; symbols login ( agent , symmetric_key ): message ; changeGroup ( agent , agent set , agent set ): message ; assignDeputy ( agent ): message ; requestAccess ( file ): message ; grantedAccess ( file ): message ; deniedAccess ( file ): message ; nonpublic noninvertible password ( agent , agent ): symmetric_key ; nonpublic cookies ( agent ): ( agent * cookie ) set ; % used by the Server to store cookies for managers centralServer : agent ; isManager ( agent ): canAccess ( agent , file ): isOwner ( agent set , file ): deputyOf ( agent , agent ): fact ; fact ; fact ; fact ; clauses accessDirect (A ,G ,F ): A -> canAccess (F) :- G -> isOwner (F) & G -> contains (A ); accessDeputy (A ,B ,F ): A -> canAccess (F) :- A -> deputyOf (B) & B -> canAccess (F ); symbols % for the concrete access examples m1 : agent ; e1 , e2 , e3 : agent ; g1 , g2 : agent set ; f1 , f2 : file ; entity Session (M , S: agent ) { entity Server (M , Actor : agent ) { % Exercise for the reader : how to formulate this for a decentralized system ?

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