<story><title>Always-on Processor magic: How Find My works while iPhone is powered off</title><url>https://naehrdine.blogspot.com/2021/09/always-on-processor-magic-how-find-my.html</url></story><parent_chain><item><author>pininja</author><text>Very interesting read. This seems to be implemented as a Bluetooth LE app running on the ultra-low power “always on processor” used for a variety of features, like “wake-up on motion.”&lt;p&gt;Much like an Tile or AirTag is implemented. No comment on what this is capable in the future.. but for now this shows power usage &amp;#x2F; signal strength &amp;#x2F; proximity of other “actually on” devices are a limitations of this feature.&lt;p&gt;What’s impressive is the mesh network effect of all these iPhones &amp;#x2F; iDevices to locate a “lost” device. I’ll be thankful if I manage to use this to retrieve a lost phone. I’ll be pretty shocked if I’m “spied on” with this style of device.</text></item></parent_chain><comment><author>TaylorAlexander</author><text>The chances of you being directly spied on are low. The chances of someone being spied on who could influence the world around you is much higher. So a journalist could be spied on right before they break a big story, potentially leading to a cover up. That’s the problem with stuff like this. Even if you have “nothing to hide” you might rely on someone who legitimately does.</text></comment>
<story><title>Always-on Processor magic: How Find My works while iPhone is powered off</title><url>https://naehrdine.blogspot.com/2021/09/always-on-processor-magic-how-find-my.html</url></story><parent_chain><item><author>pininja</author><text>Very interesting read. This seems to be implemented as a Bluetooth LE app running on the ultra-low power “always on processor” used for a variety of features, like “wake-up on motion.”&lt;p&gt;Much like an Tile or AirTag is implemented. No comment on what this is capable in the future.. but for now this shows power usage &amp;#x2F; signal strength &amp;#x2F; proximity of other “actually on” devices are a limitations of this feature.&lt;p&gt;What’s impressive is the mesh network effect of all these iPhones &amp;#x2F; iDevices to locate a “lost” device. I’ll be thankful if I manage to use this to retrieve a lost phone. I’ll be pretty shocked if I’m “spied on” with this style of device.</text></item></parent_chain><comment><author>trangus_1985</author><text>If you&amp;#x27;re not familiar with it, their platform security team releases a whitepaper about the technical details of their security. Regardless of how you feel about Apple, these documents are incredibly well done and interesting to read. The Find My section may have more information, as will their contract tracing docs (which use a riff of the same technology)&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;covid19.apple.com&amp;#x2F;contacttracing&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;covid19.apple.com&amp;#x2F;contacttracing&lt;/a&gt;&lt;p&gt;I highly recommend anyone interested in security or privacy to read this from start to finish:&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;manuals.info.apple.com&amp;#x2F;MANUALS&amp;#x2F;1000&amp;#x2F;MA1902&amp;#x2F;en_US&amp;#x2F;apple-platform-security-guide.pdf&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;manuals.info.apple.com&amp;#x2F;MANUALS&amp;#x2F;1000&amp;#x2F;MA1902&amp;#x2F;en_US&amp;#x2F;app...&lt;/a&gt;</text></comment>