General resources on small satellites

• State of the Art Small Satellite by NASA
• CubeSat 1-0-1 by NASA
• KiboCUBE Academy

Crowd-source ground-station network (SatNOGs)

• Libre foundation
• Ground station control software: https://wiki.satnogs.org/Software

Security-related sources

• ESA SPACE-SHIELD
• Security for Space System (3S) Conference
• Ctrl+Space CTF by ESA
• Space Attack Research and Tactic Analysis (SPARTA)