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 2021 Workshop, held in conjunction with the ACM CCS conference, is the twentieth in a yearly forum for papers on all the different aspects of privacy in today's electronic society. The workshop seeks submissions from academia, industry, and government 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. Topics of interest include, but are not limited to:

access and query privacy theory of data anonymization privacy and human rights
anonymization and transparency privacy models privacy metrics
crowdsourcing for privacy and security network privacy privacy in mobile systems
data correlation and leakage attacks personally identifiable information privacy in outsourced scenarios
data security and privacy privacy-aware access control privacy in sensor networks
data and computations integrity in emerging scenarios privacy and anonymity on the Web privacy in surveillance systems
electronic communication privacy privacy in big data privacy policies
economics of privacy privacy in biometric systems privacy of provenance data
information dissemination control privacy in cloud and grid systems privacy in social networks
insider-threat protection privacy and data mining privacy threats
models, languages, and techniques for big data protection privacy in the digital business privacy and virtual identity
anonymization of text, unstructured data and multimedia privacy in the Internet of Things user privacy
anonymization of longitudinal data and streams privacy enhancing technologies wireless privacy
statistical disclosure control privacy in health care and public administration