feat(docs): Add network overview

docs/getstarted/account.md

@@ -1,5 +0,0 @@
-# Logging in
-
-Some useful features of this library require an active login session with Apple in order to work correctly.
-That's because the remote endpoints require authentication to actually retrieve data.
-This page will guide you through the steps needed to log into an Apple account using FindMy.py.

docs/technical/1-Network.md

@@ -1,2 +1,41 @@
-# Overview of the Network
+# The Network
 
+This page aims to provide an overview of how the Find My-network works on a technical level.
+It does this by explaining in detail what data the tags are broadcasting, how this is picked up
+by surrounding iDevices, and how generated location reports can be retrieved.
+
+```{note}
+While official AirTags (and compatible 3rd party tags) use the same principles as described
+in this document, they also offer a key rotation feature. To learn more about
+how this works, please check out the dedicated [AirTags](#10-AirTags) page.
+```
+
+## Overview
+
+Simply said, the FindMy-network works by having accessories such as AirTags broadcast a unique signal over bluetooth.
+Any nearby iDevice, such as iPhones or iPads, are able to receive this signal. Once the device is aware of the nearby
+accessory, it will upload its current location to Apple's servers, from where it can be retrieved by the owner of the accessory.
+
+Apple has put a lot of effort into making the network as private as possible. By utilizing encryption,
+it is possible for finder devices to encrypt their location with a key that the accessory is broadcasting
+before sending it to Apple. This public key allows encryption of certain data, but not decryption. In order
+to download location reports for the accessory, we therefore need the private key corresponding to said public key.
+These keys, together called a key pair, were generated and exchanged when the accessory was first paired and are now
+stored on the owner's devices. By downloading the correct encrypted location reports and then locally decrypting
+said reports using the private key, users are able to track their devices without Apple ever being able to read the location.
+
+![](https://github.com/seemoo-lab/openhaystack/raw/main/Resources/FindMyOverview.png)
+
+*An overview of the FindMy-network. Source: [SEEMOO-LAB](https://www.petsymposium.org/2021/files/papers/issue3/popets-2021-0045.pdf)*.
+
+Fetching (encrypted) location reports still requires an Apple account. It is worth noting however, that anyone can download
+anyone else's location reports for any of their devices; however, due to the encryption scheme discussed above,
+doing this would be rather useless as none of the retrieved reports could be decrypted. This scheme allows devices
+to operate without being linked to a specific Apple account. The below dependency diagram visually explains how this entire
+system hinges on the availability of the private key; without it, location reports could not be retrieved and decrypted.
+
+
+![](dependency_diagram.png)
+
+*A dependency diagram of data in the network. An arrow pointing from A to B means that in order
+to retrieve B, we first require A.*