CO-SECUR aims to build knowledge and a suite of tools, including a Societal Development Plan (SDP) to foster and accelerate the adoption of social innovations and responsible innovation principles that contribute to successful, more effective, and co-produced security solutions for public spaces (with special focus on massive events and crowded places), generating trust, acceptance, increasing security, security perception, and security behavior. For that, CO-SECUR will follow a methodology of 4 phases: 1) Literature review of evidence in security and security perception; 2) Security practices mapping and selection; 3) Descriptive analysis of 72-180 case studies from 9 European countries and critical synthesis of results; and 4) Co-writing and validation of the SDP and tools involving the Quintuple helix + media through participative activities (i.e. hybrid seminars, national working groups, national workshops, public consultation at EU level). As a result, the SDP will contain a depth description of Social Innovation on Security in Europe, a compendium of good practices, and a roadmap of actions. The suite of tools will provide additional supportive material in terms of best practices on fostering smart local communities; policy recommendations on how to orientate security solutions towards RRI and social innovation involving the Quintuple helix + media; benchmarking for industry; and a summary of the innovative, transferable, and scalable Security Technologies. Partners will continue to disseminate and communicate the project progress and outcomes and organize a final Security Perception Conference. At the Conference, a Memorandum of Understanding will be launched and opened to be signed by any city/region willing to promote social innovation and RRI in the security solutions implemented in public spaces.