The11thInternationalConferenceonInformationandCommunicationsSecurity (ICICS 2009) was held in
Beijing China during December 14-17 2009. The ICICS conferenceseriesis anestablished forum
that bringstogether people from universities researchinstitutes industry and
governmentinstitutions who work in a range of ?elds within information and communications
security. The ICICS conferencesgiveattendeestheopportunitytoexchangenewideasandinvestigate
developments in the state of the art. In previous years ICICS has taken place in the UK (2008)
China (2007 2005 2003 2001 and 1997) USA (2006) Spain (2004) Singapore (2002) and
Australia (1999). On each occasion as on this one the proceedings have been published in the
Springer LNCS series. In total 162 manuscripts from 20 countries and districts were submitted
to ICICS 2009 and a total of 37 (31 regular papers plus 6 short papers) from 13 countries and
districts were accepted (an acceptance rate of 23%). The accepted papers cover a wide range of
disciplines within information security and applied cryptography. Each submission to ICICS 2009
was anonymously reviewed by three or four reviewers. We are very grateful to members of the
Program C- mittee which was composed of 44 members from 14 countries we would like to thank
them as well as all the external referees for their time and their valuable contributions to
the tough and time-consuming reviewing process.