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silly question here: modern smartphones rotate their mac addresses frequently for privacy, but aren't the bluetooth addresses on phones and headphones and all t
by a-dub 5y ago
silly question here: modern smartphones rotate their mac addresses frequently for privacy, but aren't the bluetooth addresses on phones and headphones and all the rest static and easily detected?
- adhesive_wombat 5y agoYes, many devices use rotating keys for this exact reason (search keyword: Resolvable Random Private address).
- a-dub 5y agoahh, interesting. so i'm guessing the whole privacy preserving digital contact tracing system was just capturing these randomly rotating keys (presumably with some signal strength filter and perhaps tuning of the frequency of key rotation) that were already beaconing out as part of having the bluetooth stack turned up. cool.