The 11th Information Security Conference (ISC 2008) was held in Taipei, T- wan, September 15-18,2008. ISC is an annual international conference covering researchintheoryandapplicationsofinformationsecurity.Itwas?rstinitiatedas a workshop(ISW) in Japan in 1997.This was followed by ISW 1999 in Malaysia and ISW 2000 in Australia. ISW became ISC when it was held in Spain in 2001 (ISC2001).ThelatestconferenceswereheldinBrazil(ISC2002), UK(ISC2003), USA(ISC2004), Singapore(ISC2005), Greece(ISC2006), andChile(ISC2007). ThisyeartheeventwassponsoredbytheChineseCryptologyandInformation- curity Association (Taiwan), the Taiwan Information Security Center of the - searchCenterforITInnovation(AcademiaSinica, Taiwan), theNationalTaiwan UniversityofScience andTechnology(Taiwan), the NTUCenterfor Information and Electronics Technologies(Taiwan), Academia Sinica (Taiwan), the National ScienceCouncil(Taiwan), the MinistryofEducation(Taiwan), the TaipeiCh- terofthe IEEEComputerSociety (Taiwan), BankProE-serviceTechnologyCo., Ltd.(Taiwan), ExsiorData &InformationTechnology, Inc.(Taiwan), Giga-Byte EducationFoundation(Taiwan), Hewlett-PackardTaiwan, HivocalTechnologies, Co., Ltd.(Taiwan), MicrosoftTaiwan, PaysecureTechnologyCo., Ltd.(Taiwan), Symlink(Taiwan), and Yahoo TaiwanHoldingsLimited(TaiwanBranch). In order to cover the conference's broad scope, this year's main Program Committee consisted of 61 experts from 22 countries. Additionally, the c- ference also featured a special AES Subcommittee, chaired by Vincent Rijmen (Graz University of Technology, Austria). Theconferencereceived134submissions from31countries,33(including 4 in the AES special session) of which were selected by the committee members for presentation at the conference, based on quality, originality and relevance. Each paperwasanonymouslyreviewedbyatleastthreecommitteemembers.Inorderto encourageandpromotestudentparticipation, theISC2008ProgramCommittee selected three student-coauthored papers for the Best Student Paper award, one fromeachregion: Asia, Europe, andtheAmericas.Thepaperswere, respectively, "Deterministic Constructions of 21-Step Collisions for the SHA-2 Hash Family," bySomitraSanadhyaandPalashSarkar(IndianStatisticalInstitute, India),"C- lisions for RC4-Hash," by Sebastiaan Indesteege and Bart Preneel (Katholieke UniversiteitLeuven, Belgium), and"ProxyRe-signaturesintheStandardModel," byShermanS.M. Chow(New YorkUniversity, USA) andRaphaelPhan(Lou- borough University, UK). The program also included invited speeches by Doug Tygar(UC Berkeley, USA) andTatsuakiOkamoto(NTT, Japan). Many people helped to make ISC 2008 successful. We would like to thank all thosewhocontributedtothetechnicalprogramandtoorganizingtheconference.