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[Mobile Device Management](https://en.wikipedia.org/wiki/Mobile\_device\_management) (MDM) is a technology commonly used to **administer end-user computing devices** such as mobile phones, laptops, desktops and tablets. In the case of Apple platforms like iOS, macOS and tvOS, it refers to a specific set of features, APIs and techniques used by administrators to manage these devices. Management of devices via MDM requires a compatible commercial or open-source MDM server that implements support for the [MDM Protocol](https://developer.apple.com/enterprise/documentation/MDM-Protocol-Reference.pdf).
The [Device Enrollment Program](https://www.apple.com/business/site/docs/DEP\_Guide.pdf) (DEP) is a service offered by Apple that **simplifies** Mobile Device Management (MDM) **enrollment** by offering **zero-touch configuration** of iOS, macOS, and tvOS devices. Unlike more traditional deployment methods, which require the end-user or administrator to take action to configure a device, or manually enroll with an MDM server, DEP aims to bootstrap this process, **allowing the user to unbox a new Apple device and have it configured for use in the organization almost immediately**.
Administrators can leverage DEP to automatically enroll devices in their organization’s MDM server. Once a device is enrolled, **in many cases it is treated as a “trusted”** device owned by the organization, and could receive any number of certificates, applications, WiFi passwords, VPN configurations [and so on](https://developer.apple.com/enterprise/documentation/Configuration-Profile-Reference.pdf).
Unfortunately, if an organization has not taken additional steps to **protect their MDM enrollment**, a simplified end-user enrollment process through DEP can also mean a simplified process for **attackers to enroll a device of their choosing in the organization’s MDM** server, assuming the "identity" of a corporate device.
* Gives clients a standardized way of sending a **Certificate Signing Request** (CSR) for the purpose of being granted a certificate. The client will ask the server to give him a signed certificate.
* “can be signed and encrypted to validate their origin, ensure their integrity, and protect their contents.” Basics — Page 70, iOS Security Guide, January 2018.
* The so-called [DEP "cloud service" API](https://developer.apple.com/enterprise/documentation/MDM-Protocol-Reference.pdf). This is used by MDM servers to associate DEP profiles with specific devices.
* The [DEP API used by Apple Authorized Resellers](https://applecareconnect.apple.com/api-docs/depuat/html/WSImpManual.html) to enroll devices, check enrollment status, and check transaction status.
* The undocumented private DEP API. This is used by Apple Devices to request their DEP profile. On macOS, the `cloudconfigurationd` binary is responsible for communicating over this API.
The file `/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/PrivateFrameworks/ConfigurationProfiles.framework/ConfigurationProfiles.tbd` exports functions that can be considered **high-level "steps"** of the enrolment process.
* Implemented by **`cloudconfigurationd`** via XPC. The **"Setup Assistant**" (when the device is firstly booted) or the **`profiles`** command will **contact this daemon** to retrieve the activation record.
It follows a few steps to get the Activation Record performed by **`MCTeslaConfigurationFetcher`**. This process uses an encryption called **Absinthe**
1. Retrieve **certificate**
1. GET [https://iprofiles.apple.com/resource/certificate.cer](https://iprofiles.apple.com/resource/certificate.cer)
1. POST to [https://iprofiles.apple.com/macProfile](https://iprofiles.apple.com/macProfile) sending the data `{ "action": "RequestProfileConfiguration", "sn": "" }`
As previously commented, in order to try to enrol a device into an organization **only a Serial Number belonging to that Organization is needed**. Once the device is enrolled, several organizations will install sensitive data on the new device: certificates, applications, WiFi passwords, VPN configurations [and so on](https://developer.apple.com/enterprise/documentation/Configuration-Profile-Reference.pdf).\
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