Security for Space Systems

**Security for Space Systems** Security for Space Systems (3S) is a conference focused on innovations in space systems security. The conference aims at bringing together academia and industry to present their latest research. **3S conference 2025** The Security for Space Systems (3S) 2025 took place place in ESTEC, Netherlands, from **4 to 6 November 2025**. The conference materials can be accessed here: [https://indico.esa.int/event/571/](https://indico.esa.int/event/571/) [Open the 2025 event web page >](https://security4space.esa.int/2025/) **Ctrl+Space CTF at 3S 2025!** ESA is pleased to announce that during the Security for Space Systems (3S) Conference, in collaboration with D-Orbit, the **first European in-orbit Capture-the-Flag (CTF)** challenge is organised. In this CTF, called ***Ctrl+Space CTF***, participants will have the chance to engage with live security challenges executed directly aboard D-Orbit’s ION Satellite Carrier, *orbiting Earth in real time*. The challenges will be realised by the *mhackeroni Team*. Ctrl+Space CTF is supported by the ESA Security Office, ESA Academy, and the ***ESA Security Cyber Centre of Excellence (SCCoE)***. [More information is available in the dedicated page](https://security4space.esa.int/2025/ctrl-space-ctf/). **Call for Ideas: Cybersecurity Experiments in Orbit** The **European Space Agency is pleased to invite researchers, engineers, and innovators to propose experimental ideas** for testing new technologies, methods, algorithms, protocols, and techniques **in the domain of cybersecurity applied to space systems**. [Read the full call for ideas here](https://security4space.esa.int/2025/cfi-cybersecurity-experiments-in-orbit/). **Previous events** **3S conference 2024** The Security for Space Systems (3S) 2024 took place in ESA ESTEC, Netherlands, from 27th to 28th of May 2024. The publications presented at the conference can be accessed at this link: [https://indico.esa.int/event/528/](https://indico.esa.int/event/528/) [Open the 2024 event web page >](https://security4space.esa.int/2024/)