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We're really going to screw things up for everyone else because of a couple dozen professional bike racers? This deal sucks
by stonogo 2y ago
We're really going to screw things up for everyone else because of a couple dozen professional bike racers? This deal sucks
- WD-42 2y agoAre we really going to argue in 2025 that encryption is too hard?
- nradov 2y agoWe are really going to argue in 2025 that encryption is too hard when you want a cheap, tiny sensor to operate for months on a single CR2032 battery.
- WD-42 2y agoSo like my wireless shifters whose battery I haven’t changed in over a year.
- nradov 2y agoWireless shifters only transmit when you press a button. Power consumption is higher with other sensors that transmit continuously at 1Hz: heart rate, running foot pods, wheel speed, cadence, etc.
- WD-42 2y agoExactly. Transmitting over radio continuously is what is expensive, not encrypting a couple of bytes.
- teruakohatu 2y ago> tiny sensor to operate for months on a single CR2032 battery. Not to mention real-time broadcasting of sensor data to multiple devices. In the case of HR data: ~1 update per second which is usually broadcasted three times in succession to ensure transmission)
- Dylan16807 2y agoI'd want to see actual numbers. Radio transmit is expensive power-wise. The numbers I'm seeing for BLE energy per bit are all over the place, but the numbers I found for some SHA3 testing say that even with a pretty old chip fab you can make a circuit that encrypts more than 10 bytes per nanojoule. That's a pretty small tax.
- yencabulator 2y agoGood handshakes are actually hard. There's no UI on these gadgets, and often not even a single button! Consider going to a public gym and wanting your heartrate to show on the exercise bike -- you'll be pairing it right there, in public.
- Dylan16807 2y agoReducing the risk to handshake is already pretty good, but also that's going to be quite hard to MitM. Just use diffie-hellman.