His current research considers the use of social media by police and intelligence agencies, as well as other forms of policing that occur on these platforms. As part of this research, he has participated in two European Commission projects on security, privacy and digital media. Daniel has authored several articles in peer-reviewed journals on this and other topics, as well as Social Media as Surveillance with Ashgate in 2012, Identity Problems in the Facebook Era with Routledge in 2013, and Social Media, Politics and the State (co-edited with Christian Fuchs) with Routledge in 2014.