mrktf
Joined 4 years ago
Joined 4 years ago
You can be very defensive and design any remote sensing controller to act as two systems - one management cpu only does data routing (no other connection than administrative tasks), sensor cpu works only with sensors. As bonus you can have management cpu act as active firewall.
Main problem it is necessary to have in house expertise (hw, fw and process knowing) which in making company lean are optimized first and outsourcing custom solutions suddenly too expensive.
seed=`date +%s%N`; ( echo "secretknock-20260811|$seed"|sha512sum ; echo $seed ) | xargs nc -u 192.168.1.1
It is not secure as hmac and it can be 'trivially' brute forced, but don't require extra tools (probably nc not always readily available).On other hand if threat vector includes network monitor with ability to replay i would use wireguard to wrap ssh traffic.
That is 'small' cheat code if parents tolerable. I have multiple peers which got much better life and places to live because lived with parents in their 20s.
It just doing napkin math and even if you live 5 years with parents and doing minimal savings (saving rent and part of food) you already poses good chunk of deposit when comes to buying property.
My points are:
- one cold prolonged winter and any savings gone.
- you need to get lucky unit which doesn't need to much maintenance
- if electricity gone pray it will be back in 48 hours (where I live - to get subsidy from government you need demolish furnace)
- using solar panels to compensate when electricity lost or without taking extra electricity: minimum 15Kwh battery storage and at least 20KW panels for generating 8KW heat energy. I based on winter solstice day.
My knowledge in this topic is not deep, but cell precision should be pretty accurate, because modern cell tower areas are much smaller, then to have well tuned beamformer it need to have relative precise angles between antennas and know signal travel time (distance). I think it should achieve something 30 or 15 meter precision (doing assumption that distance is accurate in 50/100ns order)
My reasoning is from bitter experience. I saw too many these honest talks/commitments - it always this pattern when product/company starts to decline. Suddenly somebody with technical background shows up talks about past mistakes and what need to fix. Even sometimes holds discussion, which is usually very reasonable. But as time goes there only cosmetic changes with excuses like lack of resources, market wind changed this time, too hard make changes due politics and etc.