This bookconstitutes revised selected papers from the First International Conference onInformation Systems Security and Privacy, ICISSP 2015, held in Angers, France,in February 2015. The 12papers presented in this volume were carefully reviewed and selection from atotal of 56 submissions. They were organized in topical sections named: dataand software security; privacy and confidentiality; mobile systems security; andbiometric authentication. The book also contains two invited papers.