The Security for Space Systems (3S) Conference aims at bringing together academia and industry to present cutting-edge research and innovations in space systems security. Topics of interest: following topics: Applied crypto for space. Avionics (spacecraft) security (security of avionics busses, on board data handling, processors, etc.). Ground segment security. RF jamming and anti-jamming techniques. Security at System level. Security for “New Space” and mega-constellations. Security of optical space communications. Security of space communication protocols (e.g. CCSDS). Security of satcom systems (e.g. 5G NTN, DVB-S2, etc.). Security of space relays and interplanetary missions. Security Policies for space. Security assurance, accreditation, and certification Software security for Space Systems.