Approximation Algorithms for Problems on Networks and Streams of Data. Ph.D. Dissertation, UCSB. A Formalization and Analysis of High-speed Stateful Signature Matching for Intrusion Detection. Master Thesis, University of Pisa. A Fast and Parameter-free Template Detection Method for Web Pages and Online Newspapers. Tesi di Diploma Specialistico, Sant’Anna School of Advanced Studies. A Distributed Approach to Topology Discovery in Grid Environment. Tesi di Diploma, Sant’Anna School of Advanced Studies. Studio di un metodo efficiente nella compressione dati (in Italian). Bachelor Thesis, University of Pisa.