I will assume you are a private person, living alone in its own habitat (or with a limited number of forks / LAIs) unless I mention it specifically. I always assume, even if it was never mentioned, that a tactical network is always monitored, because it is a system composed by several systems that ARE monitored (the mesh implants or morphs of the characters running the network are monitored by their Muse). Since it can be very confusing, I run it as separate systems, so the smart thing to do is to find the weakest Muse against hacking to get yourself into the network. If you are detected, you can be counterhacked and tracked, but unless they can correlate your physical position with the mesh one (or access something that can tell them where you are, like your eyes, some cameras, or even a map) it is quite useless. The best way to solve the issue of a compromised tactical network is to turn off all the wireless communication of the morphs that were using it, wait for some time, and then run it again, with a new set of codes that are impossible to hack: a random string of symbols stored into a physical support inside a protected carrier that has to be open manually and can be destroyed if the ego is killed is a good option, and of course none of the members of the team know that string (but each carries a copy): if compromised, they will go offline, check their system and read the new set of codes they did not knew before. First: You don't want to see your comms hacked, intercepted or negated? Use cables. One can rule that it is easy to set up a small fabber with enough components to produce kilometers of cabling, and as long as the enemy don't cut it, it will be safe, plus some ingenuity is needed for that (variations in signal quality can be monitored, specially if the exact parameters of the cable are known, which is easy since instead of buying it you are "making" it). Second, What can you do against a boarding group in your habitat? Step one: Detect the incursion. If they get in undetected, and reach your input/output systems, you are very screwed, because they can (and most surely will) start connecting stuff like dozens of ectos (or an equivalent system) to the habitat's mesh, placing there egos, forks, muses, or whatever they want. If you have the "manpower" to counter that, congratulations, you might be able to stall them. Step 2: gain time. A boarding is a game of knowledge: they want to know all they can about you and the habitat, and the chances are that they already have some, lots or even all the intel. Pay for materials and "hollow" containers where to build yourself a non-standard system, or use different contractors. Maybe even building different parts of your habitat in different locations, and after that you will ship it all to the place you wanna live. Making sure that their plans get modified (bribery, hacking, and ego-editing are good ways to ensure that) can be a good idea, but do not delete the data, just alter it. So observe the invaders, and see what can you discover. Step 3: separate the invaders. While they can cut through anything you lay between them, it will take them time. Step 4: hack their comms. And this is my list of favourite stuff to do when I have hacked a tactical network: - Sensor messing: make them see stuff that it is not there, or to miss things that are there. Like that door that leads to space, which instead leads inside of the reactor chamber... - Transponder messing: make some of them to be read as hostiles to the rest of the team... - Infopump: learn who is their boss, what do they want and how did they found where you are. Chances are, however, that their data about that questions is either absent or false (be it because they were psychosurgery'ed, lied to, or they did not ask...). If you cannot hack their comms, wait for the best moment to fill their comms with interference, and miss it for some seconds... It is best to shoot, then disable, than to disable and then shoot. Doing both at the same time would be best, though. Step 5: locate their exit route. Make sure they can't use it (and don't even try to use it yourself). Funny things to do: - Send some drones here and there, small enough to fit through the ventilation system. When they are on the same location of the enemy, make a small burst of interference, and switch the transponder data so the tactical network will think the drone is a member (and the member the drone was close enough stops being noticed by the network as an ally...). Make the drone to follow him, for a while... Final step: Egocast out from your secure transceiver (neutrino farcasters are the best option) after setting the main reactor to blow up two seconds after you left... Preventive countermeasures: - Have a "dummy mesh". Simply adding a number, letter or symbol before the "adress" of your network can go a long way to be sure that foreigners won't access the "real" network. - Good sensors. Input/Output detectors are the first step, a pro team will cut the hull after placing a "bubble" to prevent a difference in air pressure. The simplest solution is to have a double hull and rotate randomly the amount of atmospheres it contains inbetween... - Have several forks in ice ready to step in an fight for you. Delete them afterwards, but keep the stuff they learned if possible. - Modular building. Imagine you can rearrange the whole habitat from one layout to another in minutes or even seconds... quite the way to confuse their mapping software, specially if you can arrange for the movement and connections to not be sensed inside. All this shit, and I didn't really had to think about it. There is something seriously wrong with me... XD