Regarding efficient forensics and police activities, legalities often limit the ability to respond with technical action. Things that are technically feasible may be legally forbidden and must comply with a rigorous legal framework. This paper discusses a project of highly secure architecture that enables anyone to take part in the surveillance of the Darknet while complying with all the known legal constraints. Sensitive data collected cannot be accessed by single inves-tigators but by means of a secret sharing scheme. The tools used also succeed in bypassing most website/hidden services securities, such as banishment by IP address or crawler traps.