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update: Update to RethinkDNS, Orbot (#2612)
- Updates to RethinkDNS and Orbot in the Android overview - Grammar and typo fixes Signed-off-by: Daniel Gray <dngray@privacyguides.org>
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Daniel Gray
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@ -99,7 +99,7 @@ These DNS filtering solutions offer a web dashboard where you can customize the
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- [:simple-linux: Linux](https://docs.controld.com/docs/ctrld)
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- [:simple-googleplay: Google Play](https://play.google.com/store/apps/details?id=com.controld.setuputility)
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- [:simple-appstore: App Store](https://apps.apple.com/app/1518799460)
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- [:simple-github: GitHub](https://github.com/Control-D-Inc/ctrld/releases/tag/v1.3.5)
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- [:simple-github: GitHub](https://github.com/Control-D-Inc/ctrld/releases)
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</details>
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@ -148,7 +148,7 @@ Encrypted DNS proxy software provides a local proxy for the [unencrypted DNS](ad
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{ align=right }
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{ align=right }
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**RethinkDNS** is an open-source Android client supporting [DNS-over-HTTPS](advanced/dns-overview.md#dns-over-https-doh), [DNS-over-TLS](advanced/dns-overview.md#dns-over-tls-dot), [DNSCrypt](advanced/dns-overview.md#dnscrypt) and DNS Proxy along with caching DNS responses, locally logging DNS queries and can be used as a firewall too.
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**RethinkDNS** is an open-source Android client that supports [DNS-over-HTTPS](advanced/dns-overview.md#dns-over-https-doh), [DNS-over-TLS](advanced/dns-overview.md#dns-over-tls-dot), [DNSCrypt](advanced/dns-overview.md#dnscrypt) and DNS Proxy. It also provides additional functionality such as caching DNS responses, locally logging DNS queries, and using the app as a firewall.
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[:octicons-home-16: Homepage](https://rethinkdns.com){ .md-button .md-button--primary }
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[:octicons-eye-16:](https://rethinkdns.com/privacy){ .card-link title="Privacy Policy" }
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@ -165,6 +165,8 @@ Encrypted DNS proxy software provides a local proxy for the [unencrypted DNS](ad
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</div>
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While RethinkDNS takes up the Android VPN slot, you can still use a VPN or Orbot with the app by [adding a Wireguard configuration](https://docs.rethinkdns.com/proxy/wireguard) or [manually configuring Orbot as a Proxy server](https://docs.rethinkdns.com/firewall/orbot), respectively.
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### dnscrypt-proxy
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<div class="admonition recommendation" markdown>
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@ -21,9 +21,9 @@ Ideally, when choosing a custom Android distribution, you should make sure that
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### Avoid Rooting
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[Rooting](https://en.wikipedia.org/wiki/Rooting_(Android)) Android phones can decrease security significantly as it weakens the complete [Android security model](https://en.wikipedia.org/wiki/Android_(operating_system)#Security_and_privacy). This can decrease privacy should there be an exploit that is assisted by the decreased security. Common rooting methods involve directly tampering with the boot partition, making it impossible to perform successful Verified Boot. Apps that require root will also modify the system partition meaning that Verified Boot would have to remain disabled. Having root exposed directly in the user interface also increases the [attack surface](https://en.wikipedia.org/wiki/Attack_surface) of your device and may assist in [privilege escalation](https://en.wikipedia.org/wiki/Privilege_escalation) vulnerabilities and SELinux policy bypasses.
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[Rooting](https://en.wikipedia.org/wiki/Rooting_(Android)) Android phones can decrease security significantly as it weakens the complete [Android security model](https://en.wikipedia.org/wiki/Android_(operating_system)#Security_and_privacy). This can decrease privacy should there be an exploit that is assisted by the decreased security. Common rooting methods involve directly tampering with the boot partition, making it impossible to perform successful Verified Boot. Apps that require root will also modify the system partition, meaning that Verified Boot would have to remain disabled. Having root exposed directly in the user interface also increases the [attack surface](https://en.wikipedia.org/wiki/Attack_surface) of your device and may assist in [privilege escalation](https://en.wikipedia.org/wiki/Privilege_escalation) vulnerabilities and SELinux policy bypasses.
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Content blockers which modify the [hosts file](https://en.wikipedia.org/wiki/Hosts_(file)) (AdAway) and firewalls (AFWall+) which require root access persistently are dangerous and should not be used. They are also not the correct way to solve their intended purposes. For content blocking we suggest encrypted [DNS](../dns.md) or [VPN](../vpn.md) server blocking solutions instead. RethinkDNS, TrackerControl and AdAway in non-root mode will take up the VPN slot (by using a local loopback VPN) preventing you from using privacy enhancing services such as Orbot or a real VPN server.
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Content blockers which modify the [hosts file](https://en.wikipedia.org/wiki/Hosts_(file)) (AdAway) and firewalls (AFWall+) which require root access persistently are dangerous and should not be used. They are also not the correct way to solve their intended purposes. For content blocking, we suggest encrypted [DNS](../dns.md) or content blocking functionality provided by a VPN instead. TrackerControl and AdAway in non-root mode will take up the VPN slot (by using a local loopback VPN), preventing you from using privacy enhancing services such as [Orbot](../tor.md#orbot) or a [real VPN provider](../vpn.md).
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AFWall+ works based on the [packet filtering](https://en.wikipedia.org/wiki/Firewall_(computing)#Packet_filter) approach and may be bypassable in some situations.
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@ -31,7 +31,7 @@ We do not believe that the security sacrifices made by rooting a phone are worth
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### Install Updates
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It's important to not use an [end-of-life](https://endoflife.date/android) version of Android. Newer versions of Android not only receive security updates for the operating system but also important privacy enhancing updates too.
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It's important to not use an [end-of-life](https://endoflife.date/android) version of Android. Newer versions of Android receive not only security updates for the operating system but also important privacy enhancing updates too.
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For example, [prior to Android 10](https://developer.android.com/about/versions/10/privacy/changes) any apps with the [`READ_PHONE_STATE`](https://developer.android.com/reference/android/Manifest.permission#READ_PHONE_STATE) permission could access sensitive and unique serial numbers of your phone such as [IMEI](https://en.wikipedia.org/wiki/International_Mobile_Equipment_Identity), [MEID](https://en.wikipedia.org/wiki/Mobile_equipment_identifier), or your SIM card's [IMSI](https://en.wikipedia.org/wiki/International_mobile_subscriber_identity); whereas now they must be system apps to do so. System apps are only provided by the OEM or Android distribution.
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@ -53,7 +53,7 @@ Verified Boot ensures the integrity of the operating system files, thereby preve
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Unfortunately, OEMs are only obliged to support Verified Boot on their stock Android distribution. Only a few OEMs such as Google support custom AVB key enrollment on their devices. Additionally, some AOSP derivatives such as LineageOS or /e/ OS do not support Verified Boot even on hardware with Verified Boot support for third-party operating systems. We recommend that you check for support **before** purchasing a new device. AOSP derivatives which do not support Verified Boot are **not** recommended.
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Many OEMs also have broken implementation of Verified Boot that you have to be aware of beyond their marketing. For example, the Fairphone 3 and 4 are not secure by default, as the [stock bootloader trusts the public AVB signing key](https://forum.fairphone.com/t/bootloader-avb-keys-used-in-roms-for-fairphone-3-4/83448/11). This breaks verified boot on a stock Fairphone device, as the system will boot alternative Android operating systems such (such as /e/) [without any warning](https://source.android.com/security/verifiedboot/boot-flow#locked-devices-with-custom-root-of-trust) about custom operating system usage.
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Many OEMs also have broken implementation of Verified Boot that you have to be aware of beyond their marketing. For example, the Fairphone 3 and 4 are not secure by default, as the [stock bootloader trusts the public AVB signing key](https://forum.fairphone.com/t/bootloader-avb-keys-used-in-roms-for-fairphone-3-4/83448/11). This breaks verified boot on a stock Fairphone device, as the system will boot alternative Android operating systems (such as /e/) [without any warning](https://source.android.com/security/verifiedboot/boot-flow#locked-devices-with-custom-root-of-trust) about custom operating system usage.
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### Firmware Updates
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@ -90,7 +90,7 @@ Android 12:
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Android 13:
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- A permission for [nearby Wi-Fi access](https://developer.android.com/about/versions/13/behavior-changes-13#nearby-wifi-devices-permission). The MAC addresses of nearby Wi-Fi access points was a popular way for apps to track a user's location.
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- A permission for [nearby Wi-Fi access](https://developer.android.com/about/versions/13/behavior-changes-13#nearby-wifi-devices-permission). The MAC addresses of nearby Wi-Fi access points were a popular way for apps to track a user's location.
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- More [granular media permissions](https://developer.android.com/about/versions/13/behavior-changes-13#granular-media-permissions), meaning you can grant access to images, videos or audio files only.
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- Background use of sensors now requires the [`BODY_SENSORS`](https://developer.android.com/about/versions/13/behavior-changes-13#body-sensors-background-permission) permission.
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@ -136,11 +136,11 @@ Android 7 and above supports a VPN kill switch, and it is available without the
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### Global Toggles
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Modern Android devices have global toggles for disabling Bluetooth and location services. Android 12 introduced toggles for the camera and microphone. When not in use, we recommend disabling these features. Apps cannot use disabled features (even if granted individual permission) until re-enabled.
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Modern Android devices have global toggles for disabling Bluetooth and location services. Android 12 introduced toggles for the camera and microphone. When not in use, we recommend disabling these features. Apps cannot use disabled features (even if granted individual permissions) until re-enabled.
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## Google Services
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If you are using a device with Google services, either your stock operating system or an operating system that safely sandboxes Google Play Services like GrapheneOS, there are a number of additional changes you can make to improve your privacy. We still recommend avoiding Google services entirely, or limiting Google Play services to a specific user/work profile by combining a device controller like *Shelter* with GrapheneOS's Sandboxed Google Play.
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If you are using a device with Google services—whether with the stock operating system or an operating system that safely sandboxes Google Play Services like GrapheneOS—there are a number of additional changes you can make to improve your privacy. We still recommend avoiding Google services entirely, or limiting Google Play services to a specific user/work profile by combining a device controller like *Shelter* with GrapheneOS's Sandboxed Google Play.
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### Advanced Protection Program
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@ -177,7 +177,7 @@ On Android distributions with privileged Google Play Services (such as stock OSe
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- :gear: **Settings** → **Google** → **Ads**
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- :gear: **Settings** → **Privacy** → **Ads**
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You will either be given the option to delete your advertising ID or to *Opt out of interest-based ads*, this varies between OEM distributions of Android. If presented with the option to delete the advertising ID that is preferred. If not, then make sure to opt out and reset your advertising ID.
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You will either be given the option to delete your advertising ID or to *Opt out of interest-based ads* (this varies between OEM distributions of Android). If presented with the option to delete the advertising ID, that is preferred. If not, then make sure to opt out and reset your advertising ID.
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### SafetyNet and Play Integrity API
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