The hacktivist group Cult of the Dead Cow will release details about the system at Def Con next week.

Cult of the Dead Cow is a hacker collective whose members at one time included Texas politician Beto O’Rourke. Once known for distributing hacking tools and shaming software companies into improving their security, a famed group of technology activists is now working to develop a system that will allow the creation of messaging and social networking apps that won’t keep hold of users’ personal data.