Constitutes the refereed proceedings of the 8th Italian Conference on Theoretical Computer Science, ICTCS 2003, held in Bertinoro, Italy in October 2003. The 27 revised full papers presented together with an invited paper and abstracts of 2 invited talks were reviewed and selected from 65 submissions.

Invited Talks.- Extreme Nash Equilibria.- Certification of Memory Usage.- On Programming Models for Mobility.- Program Design, Models and Analysis.- On the Computational Complexity of Cut-Elimination in Linear Logic.- A Constructive Proof of the Soundness of the Encoding of Random Access Machines in a Linda Calculus with Ordered Semantics.- Finite Horizon Analysis of Stochastic Systems with the Mur? Verifier.- Towards Compact and Tractable Automaton-Based Representations of Time Granularities.- Lower Bounds on the Size of Quantum Automata Accepting Unary Languages.- Refined Effects for Unanticipated Object Re-classification: .- Algorithms and Complexity.- Cost Constrained Fixed Job Scheduling.- A Work-Optimal Coarse-Grained PRAM Algorithm for Lexicographically First Maximal Independent Set.- An Approximation Algorithm for the Minimum Weight Vertex-Connectivity Problem in Complete Graphs with Sharpened Triangle Inequality.- Channel Assignment in Honeycomb Networks.- Exact Solution of a Class of Frequency Assignment Problems in Cellular Networks.- The Complexity of Checking Consistency of Pedigree Information and Related Problems.- On Clausal Equivalence and Hull Inclusion.- Semantics and Formal Languages.- Logical Semantics for the First Order ?-Calculus.- On the Expressive Power of Light Affine Logic.- Reasoning about Self and Others: Communicating Agents in a Modal Action Logic.- Decidability Properties of Recursive Types.- Algebraic Theories for Contextual Pre-nets.- A Coalgebraic Description of Web Interactions.- A Calculus for Dynamic Linking.- Towards a Smart Compilation Manager for Java.- Security and Cryptography.- Anonymous Group Communication in Mobile Networks.- Aspects of Pseudorandomness in Nonlinear Generators of Binary Sequences.- AnInformation-Theoretic Approach to the Access Control Problem.- Security-Aware Program Transformations.- Information Flow Security and Recursive Systems.- Compositional Verification of Secure Streamed Data: A Case Study with EMSS.