This book constitutes the refereed proceedings of the 15th IFIP TC 6/TC 11 International Conference on Communications and Multimedia Security, CMS 2014, held in Aveiro, Portugal, in September 2014. The 4 revised full papers presented together with 6 short papers, 3 extended abstracts describing the posters that were discussed at the conference, and 2 keynote talks were carefully reviewed and selected from 22 submissions. The papers are organized in topical sections on vulnerabilities and threats, identification and authentification, applied security.

This book constitutes the refereed proceedings of the 14th IFIP TC 6/TC 11 International Conference on Communications and Multimedia Security, CMS 2013, held in Magdeburg, Germany, in September 2013. The 5 revised full papers presented together with 11 short papers, 5 extended abstracts describing the posters that were discussed at the conference, and 2 keynote talks were carefully reviewed and selected from 30 submissions. The papers are organized in topical sections on biometrics; applied cryptography; digital watermarking, steganography and forensics; and social network privacy, security and authentication.

The first Annual Working Conference ofWG11.4oftheInter nationalFederationforInformation Processing (IFIP),focuseson variousstate of the art concepts in the field of Network and Dis tributedSystemsSecurity. Oursocietyisrapidly evolvingand irreversibly set onacourse governedby electronicinteractions. Wehave seen thebirthofe mail in the early seventies, and are now facing new challenging applicationssuchase commerce, e government,...Themoreour societyrelies on electronicforms ofcommunication,themorethe securityofthesecommunicationnetworks isessentialforitswell functioning. Asaconsequence,researchonmethodsandtechniques toimprove network security iso fparam ount importance. ThisWorking Conference bringstogetherresearchersandprac tionersofvariousdisciplines,organisationsandcountries,todiscuss thelatestdevelopmentsinsecurity protocols, secure software engin eering,mobileagentsecurity,e commercesecurityandsecurityfor distributedcomputing. Wearealsopleasedtohaveattractedtwointernationalspeakers topresenttwo case studies,one dealing withBelgium'sintentionto replacetheidentity card ofitscitizensbyanelectronicversion,and theotherdiscussingtheimplicationsofthesecuritycertificationin amultinationalcorporation. ThisWorking Conference s houldalsobeconsideredasthekick off activity ofWG11.4, the aimsof which can be summarizedas follows: topromoteresearch on technical measures forsecuringcom puternetworks, including bothhardware andsoftware based techniques. to promote dissemination of research results in the field of network security in real lifenetworks in industry, academia and administrative ins titutions. viii topromoteeducationintheapplicationofsecuritytechniques, andtopromotegeneral awarenessa boutsecurityproblems in thebroadfieldofinformationtechnology. Researchers and practioners who want to get involved in this Working Group, are kindlyrequestedtocontactthechairman. MoreinformationontheworkingsofWG11.4isavailable from the officialIFIP website:http://www.ifip.at.org/. Finally,wewish toexpressour gratitudetoallthosewho have contributedtothisconference in one wayoranother. Wearegr ate fultothe internationalrefereeboard whoreviewedallthe papers andtotheauthorsandinvitedspeakers,whosecontributionswere essential to the successof the conference. We would alsoliketo thanktheparticipantswhosepresenceand interest, togetherwith thechangingimperativesofsociety,willprovea drivingforce for futureconferencestocome.

This book constitutes the refereed proceedings of the 13th IFIP TC 6/TC 11 International Conference on Communications and Multimedia Security, CMS 2012, held in Canterbury, UK, in September 2012. The 6 revised full papers presented together with 8 short papers, 8 extended abstracts describing the posters that were discussed at the conference, and 2 keynote talks were carefully reviewed and selected from 43 submissions. The papers are organized in topical sections on image and handwriting analysis, authentication and performance, biometrics, forensics and watermarking, and communications security.

This book constitutes the refereed proceedings of the 12th IFIP TC 6/TC 11 International Conference on Communications and Multimedia Security, CMS 2010, held in Ghent, Belgium, in October 2011. The 26 revised papers presented were carefully reviewed and selected from 52 submissions. The papers are organized in topical sections on usability, architecture and framework security, mobile identity management, secure hardware platforms, biometrics, multimedia security, network security and authentication.

Over the last decade, we have witnessed a growing dependency on information technologyresultingina wide rangeofnew opportunities. Clearly, ithas become almost impossible to imagine life without a personal computer or laptop, or without a cell phone. Social network sites (SNS) are competing with face-- face encounters and may even oust them. Most SNS-adepts have hundreds of "friends," happily sharing pictures and pro?les and endless chitchat. We are on the threshold of the Internet of Things, where every object will have its RFID-tag. This will not only e?ect companies, who will be able to optimize their production and delivery processes, but also end users, who will be able to enjoy many new applications, ranging from smart shopping, and smart fridges to geo-localized services. In the near future, elderly people will be able to stay longer at home due to clever health monitoring systems. The sky seems to be the limit However, we have also seen the other side of the coin: viruses, Trojan horses, breaches of privacy, identity theft, and other security threats. Our real and virtual worlds are becoming increasingly vulnerable to attack. In order to encouragesecurity researchby both academia and industry and to stimulate the dissemination of results, conferences need to be organized. With the 11th edition of the joint IFIP TC-6 TC-11 Conference on C- munications and Multimedia Security (CMS 2010), the organizers resumed the tradition of previous CMS conferences after a three-year recess.

The first Annual Working Conference ofWG11.4oftheInter nationalFederationforInformation Processing (IFIP), focuseson variousstate of the art concepts in the field of Network and Dis tributedSystemsSecurity. Oursocietyisrapidly evolvingand irreversibly set onacourse governedby electronicinteractions. Wehave seen thebirthofe mail in the early seventies, and are now facing new challenging applicationssuchase commerce, e government, ....Themoreour societyrelies on electronicforms ofcommunication, themorethe securityofthesecommunicationnetworks isessentialforitswell functioning. Asaconsequence, researchonmethodsandtechniques toimprove network security iso fparam ount importance. ThisWorking Conference bringstogetherresearchersandprac tionersofvariousdisciplines, organisationsandcountries, todiscuss thelatestdevelopmentsinsecurity protocols, secure software engin eering, mobileagentsecurity, e commercesecurityandsecurityfor distributedcomputing. Wearealsopleasedtohaveattractedtwointernationalspeakers topresenttwo case studies, one dealing withBelgium'sintentionto replacetheidentity card ofitscitizensbyanelectronicversion, and theotherdiscussingtheimplicationsofthesecuritycertificationin amultinationalcorporation. ThisWorking Conference s houldalsobeconsideredasthekick off activity ofWG11.4, the aimsof which can be summarizedas follows: topromoteresearch on technical measures forsecuringcom puternetworks, including bothhardware andsoftware based techniques. to promote dissemination of research results in the field of network security in real lifenetworks in industry, academia and administrative ins titutions. viii topromoteeducationintheapplicationofsecuritytechniques, andtopromotegeneral awarenessa boutsecurityproblems in thebroadfieldofinformationtechnology. Researchers and practioners who want to get involved in this Working Group, are kindlyrequestedtocontactthechairman. MoreinformationontheworkingsofWG11.4isavailable from the officialIFIP website: http: //www.ifip.at.org/. Finally, wewish toexpressour gratitudetoallthosewho have contributedtothisconference in one wayoranother. Wearegr ate fultothe internationalrefereeboard whoreviewedallthe papers andtotheauthorsandinvitedspeakers, whosecontributionswere essential to the successof the conference. We would alsoliketo thanktheparticipantswhosepresenceand interest, togetherwith thechangingimperativesofsociety, willprovea drivingforce for futureconferen