How does Apple privately find offline devices? • Hacker News Board

Re: How does Apple privately find offline devices?

#181

Post by [deleted] » Fri, Jun 07, 2019, 4:59 PM UTC

imhoguy wrote: post #13

I see lots of poor Lassies in airports, conferencies and generally in crowded places. Not even mentioning flood or replay attacks. Lassie's help needs to have some limits otherwise it may quickly drain batteries or mobile plans especially in roaming.

[deleted]

Re: How does Apple privately find offline devices?

#182

Post by imhoguy » Fri, Jun 07, 2019, 5:01 PM UTC

randyrand wrote: post #56

imhoguy wrote: post #13

I see lots of poor Lassies in airports, conferencies and generally in crowded places. Not even mentioning flood or replay attacks. Lassie's help needs to have some limits otherwise it may quickly drain batteries or mobile plans especially in roaming.

"Apple's recommended setting of 100 ms advertising interval with a coin cell battery provides for 1–3 months of life, which increases to 2–3 years as advertising interval is increased to 900 ms." iPhone's have about at 10X larger batter than that. So iPhones can do this for ~20-30 years if configured correctly.

It is not about BLE beacons. Right, they are energy efficient. But receiving party needs to listen constantly and proces these messages. With 1000 beacons around at 1s interval it means the intermediary node needs to send 1000 notifications per second to Apple. That can be buffered and optimized, but still it is some non-trivial number and possible bottleneck to be exploited.

Re: How does Apple privately find offline devices?

#183

Post by acoard » Fri, Jun 07, 2019, 6:17 PM UTC

wongarsu wrote: post #159

Cthulhu_ wrote: post #137

Earlier quoted context omitted.

I'm sure they prefer to focus on bigger cases - why go with a single bike theft if they can investigate an organized bike theft and laundering organization? Why bother with a single phone theft if they find a warehouse full of stolen merchandise? But yeah, that does mean a lot of petty crime goes unpunished. Stealing a bike here has become normalized - as in, "my bike got stolen, I need to get home so I'll just steal…

> why go with a single bike theft because of > Stealing a bike here has become normalized - as in, "my bike got stolen, I need to get home so I'll just steal another" There's three options: 1. We abolish ownership 2. Everyone is responsible for protecting his own stuff, resorting to vigilante justice if he finds the thief after the fact 3. The taxes we pay fund police and courts to bring justice. Option 1 is a versio…

>There's three options:

All your options assume a perfectly rational world. The world we have now is not one of those 3 options, but it exists. Things are often internally contradictory.

Re: How does Apple privately find offline devices?

#184

Post by Phlarp » Sat, Jun 08, 2019, 7:29 AM UTC

photojosh wrote: post #113

Phlarp wrote: post #76

Earlier quoted context omitted.

It's also the SSD controller, and quite impressive in that regard.

I bet the T3, whenever that arrives, will be a derivative of the A12 or A13, and provide the neural network accelerator to MacOS and CoreML.

This would be excellent. I'm hesitant about the prospect of an ARM based macbook, but having both seems mighty compelling. As a lower power application CPU for light usage, or a full x86 with accelerators / co-processors when needed.