The need for privacy-aware policies, regulations, and techniques has been widely recognized. This workshop discusses the problems of privacy in the global interconnected societies and possible solutions. The 2013 Workshop, held in conjunction with the ACM CCS conference, is the twelfth in a yearly forum for papers on all the different aspects of privacy in today's electronic society. The workshop seeks submissions from academia and industry presenting novel research on all theoretical and practical aspects of electronic privacy, as well as experimental studies of fielded systems. We encourage submissions from other communities such as law and business that present these communities' perspectives on technological issues.