Constitutes the refereed proceedings of the 17th International Conference on Concurrency Theory, CONCUR 2007, held in Lisbon, Portugal, September 3-8, 2007. This title presents 30 revised full papers together with 3 invited papers that were reviewed and selected from 112 submissions.

Invited Lectures.- Mapping the Security Landscape: A Role for Language Techniques.- The Saga of the Axiomatization of Parallel Composition.- Rule-Based Modelling of Cellular Signalling.- Contributed Papers.- Making Random Choices Invisible to the Scheduler.- Strategy Logic.- Solving Games Via Three-Valued Abstraction Refinement.- Linear Time Logics Around PSL: Complexity, Expressiveness, and a Little Bit of Succinctness.- On Modal Refinement and Consistency.- Equivalence Checking for Infinite Systems Using Parameterized Boolean Equation Systems.- Decidability Results for Well-Structured Transition Systems with Auxiliary Storage.- A Nice Labelling for Tree-Like Event Structures of Degree 3.- Causal Message Sequence Charts.- Checking Coverage for Infinite Collections of Timed Scenarios.- Is Observational Congruence Axiomatisable in Equational Horn Logic?.- The Must Preorder Revisited.- Topology-Dependent Abstractions of Broadcast Networks.- On the Expressive Power of Global and Local Priority in Process Calculi.- A Marriage of Rely/Guarantee and Separation Logic.- Fair Cooperative Multithreading.- Precise Fixpoint-Based Analysis of Programs with Thread-Creation and Procedures.- Automatic Derivation of Compositional Rules in Automated Compositional Reasoning.- Compositional Event Structure Semantics for the Internal ?-Calculus.- Interpreting a Finitary Pi-calculus in Differential Interaction Nets.- Mobility Control Via Passports.- Coalgebraic Models for Reactive Systems.- Reactive Systems over Directed Bigraphs.- Asynchronous Games: Innocence Without Alternation.- Bisimulation and Logical Preservation for Continuous-Time Markov Decision Processes.- Strategy Synthesis for Markov Decision Processes and Branching-Time Logics.- Timed Concurrent Game Structures.- PushdownModule Checking with Imperfect Information.- Alternating Automata and a Temporal Fixpoint Calculus for Visibly Pushdown Languages.- Temporal Antecedent Failure: Refining Vacuity.