 Whereas information technology is typically seen as the cause of privacy problems, there are also several ways in which information technology can help to solve these problems. There are rules, guidelines or best practices that can be used for designing privacy-preserving systems. Such possibilities range from ethically-informed design methodologies to using encryption to protect personal information from unauthorized use. In particular, methods from the field of information security, aimed at protecting information against unauthorized access, can play a key role in the protection of personal data.