This book constitutes the thoroughly refereed post-workshop proceedings of the 26th International Workshop on Security Protocols, held in Cambridge, UK, in March 2018. The volume consists of 17 thoroughly revised invited papers presented together with the respective transcripts of discussions. The theme of this year's workshop was fail-safe and fail-deadly concepts in protocol design. The topics covered included failures and attacks; novel protocols; threat models and incentives; cryptomoney; and the interplay of cryptography and dissent.

This book constitutes the thoroughly refereed post-workshop proceedings of the 25th International Workshop on Security Protocols, held in Cambridge, UK, in March 2017. The volume consists of 16 thoroughly revised invited papers presented together with the respective transcripts of discussions. The theme of this year's workshop was multi-objective security and the topics covered included security and privacy, formal methods and theory of security, systems security, network security, software and application security, human and societal aspects of security and privacy, security protocols, web protocol security, and mobile and wireless security.

This book constitutes the thoroughly refereed post-workshop proceedings of the 22nd International Workshop on Security Protocols, held in Cambridge, UK, in March 2014. After an introduction the volume presents 18 revised papers each followed by a revised transcript of the presentation and ensuing discussion at the event. The theme of this year's workshop is "Collaborating with the Enemy".

This book constitutes the thoroughly refereed post-proceedings of the 17th International Workshop on Security Protocols, SP 2009, held in Cambridge, UK, in April 2009. The 17 revised full papers presented together with edited transcriptions of some of the discussions following the presentations have gone through multiple rounds of reviewing, revision, and selection. The theme of this workshop was "Brief Encounters". In the old days, security protocols were typically run first as preliminaries to, and later to maintain, relatively stable continuing relationships between relatively unchanging individual entities. Pervasive computing, e-bay and second life have shifted the ground: we now frequently desire a secure commitment to a particular community of entities, but relatively transient relationships with individual members of it, and we are often more interested in validating attributes than identity. The papers and discussions in this volume examine the theme from the standpoint of various different applications and adversaries.

What constitutes an identity, how do new technologies affect identity, how do we manage identities in a globally networked information society? The increasing div- sity of information and communication technologies and their equally wide range of usage in personal, professional and official capacities raise challenging questions of identity in a variety of contexts. The aim of the IFIP/FIDIS Summer Schools has been to encourage young a- demic and industry entrants to share their own ideas about privacy and identity m- agement and to build up collegial relationships with others. As such, the Summer Schools have been introducing participants to the social implications of information technology through the process of informed discussion. The 4th International Summer School took place in Brno, Czech Republic, during September 1-7, 2008. It was organized by IFIP (International Federation for Infor- tion Processing) working groups 9.2 (Social Accountability), 9.6/11.7 (IT Misuse and the Law) and 11.6 (Identity Management) in cooperation with the EU FP6 Network of Excellence FIDIS and Masaryk University in Brno. The focus of the event was on security and privacy issues in the Internet environment, and aspects of identity m- agement in relation to current and future technologies in a variety of contexts.

This book constitutes the thoroughly refereed post-proceedings of the 16th International Workshop on Security Protocols, SP 2008, held in Cambridge, UK, in April 2008. The 17 revised full papers presented together with edited transcriptions of some of the discussions following the presentations have gone through multiple rounds of reviewing, revision, and selection. The theme of this workshop was "Remodelling the Attacker" with the intention to tell the students at the start of a security course that it is very important to model the attacker, but like most advice to the young, this is an oversimplification. Shouldn't the attacker's capability be an output of the design process as well as an input? The papers and discussions in this volume examine the theme from the standpoint of various different applications and adversaries.

The volume LNCS 12287 constitutes the proceedings of the 27th International Workshop on Security Protocols, held in Cambridge, UK, in April 2019. The volume consists of 16 thoroughly revised invited papers presented together with the respective transcripts of discussions. The theme of this year's workshop was "Security Protocols for Humans" The topics covered included Designing for Humans and Understanding Humans, Human Limitations in Security, Secure sharing and collaboration and much more.

This book constitutes the thoroughly refereed post-workshop proceedings of the 24 th International Workshop on Securit Protocols, held in Brno, Czech Republic, in April 2016. The 13 thoroughly revised papers presented together with the respective transcripts of discussions have been carefully reviewed. The theme of the workshop was Evolving Security - considering that security protocols evolve with their changing requirements, their changing mechanisms and attackers' changing agendas and capabilities.

This book constitutes the thoroughly refereed post-workshop proceedings of the 23rd International Workshop on Security Protocols, held in Cambridge, UK, in March/April 2015. After an introduction the volume presents 18 revised papers each followed by a revised transcript of the presentation and ensuing discussion at the event. The theme of this year's workshop is "Information Security in Fiction and in Fact".

This book constitutes the refereed proceedings of the 4th International Conference on Security, Privacy, and Applied Cryptography Engineering held in Pune, India, in October 2014. The 19 papers presented together with two invited papers were carefully reviewed and selected from 66 submissions. The papers are organized in topical sections on cryptographic building blocks; mini tutorial; attacks and countermeasures; tools and methods; and secure systems and applications.

What constitutes an identity, how do new technologies affect identity, how do we manage identities in a globally networked information society? The increasing div- sity of information and communication technologies and their equally wide range of usage in personal, professional and official capacities raise challenging questions of identity in a variety of contexts. The aim of the IFIP/FIDIS Summer Schools has been to encourage young a- demic and industry entrants to share their own ideas about privacy and identity m- agement and to build up collegial relationships with others. As such, the Summer Schools have been introducing participants to the social implications of information technology through the process of informed discussion. The 4th International Summer School took place in Brno, Czech Republic, during September 1-7, 2008. It was organized by IFIP (International Federation for Infor- tion Processing) working groups 9.2 (Social Accountability), 9.6/11.7 (IT Misuse and the Law) and 11.6 (Identity Management) in cooperation with the EU FP6 Network of Excellence FIDIS and Masaryk University in Brno. The focus of the event was on security and privacy issues in the Internet environment, and aspects of identity m- agement in relation to current and future technologies in a variety of contexts.