This book constitutes the refereed proceedings of the 4th International Joint Conference on Automated Reasoning, IJCAR 2008, held in Sydney, Australia, in August 2008. The 26 revised full research papers and 13 revised system descriptions presented together with 4 invited papers and a summary of the CASC-J4 systems competition were carefully reviewed and selected from 80 full paper and 17 system description submissions. The papers address the entire spectrum of research in automated reasoning and are organized in topical sections on specific theories, automated verification, protocol...

ThisvolumecontainstheworkshopproceedingsofARSPA-WITS2010, theJoint Workshop on Automated Reasoning for Security Protocol Analysis and Issues in the Theory of Security, held during March 27 28, 2010 in Paphos (Cyprus). ARSPA-WITS2010o?eredaforumfordiscussingnewresultsintheoriesofc- putersecurity, openquestionsandfundamentalconcernsaboutexistingtheories, and issues related to the development and application of automated reas- ing techniques and tools for the formal speci?cation and analysis of security protocols. There were 28 submissions. All the submissions were thoroughly evaluated on the...