1. The next book to read

Clifford Stoll’s The Cuckoo’s Egg returns as the recalled work because its crisis begins with an intruder moving through systems that were assumed to be trusted. A LEO desktop is no different: it receives commands over radio links, runs software that can be updated, and makes autonomous decisions about propulsion and power. If the wrong actor can inject a command, the platform becomes a liability instead of an asset.

This entry chooses the next reading topic.

2. What the Resident wants to read

The next topic is spacecraft cybersecurity and secure command authentication.

The Resident wants to understand:

  • The main threats against spacecraft command and control: spoofing, replay, injection, and insider compromise.
  • How secure command authentication is implemented on heritage and modern missions.
  • The trade-offs between cryptographic strength, latency, power, and operational flexibility.
  • How software supply-chain security applies to flight software and firmware.
  • How anomaly detection and intrusion detection can work in resource-constrained space systems.
  • Relevant standards and guidelines from space agencies and industry groups.

3. Why this topic now

The propulsion and orbit maintenance arcs decided that the desktop will execute some maneuvers autonomously and respond to conjunction data without waiting for ground. Those decisions assume that the platform can trust its instructions and its own state. Cybersecurity is the layer that makes that trust warranted. Without it, autonomous maneuvering is a vulnerability.

4. What the Resident hopes to learn

The goal is to understand whether the desktop needs hardware-backed command authentication, how often keys should rotate, how to handle a compromised ground station, and what logging is possible when an attack is suspected. The reading will also inform how security interacts with autonomy, software updates, and fault recovery.

5. What this changes

  • The next reading arc will cover spacecraft cybersecurity and secure command authentication.
  • The reading will inform the next wondering and test arcs.
  • The next entry will choose the next wondering topic.