Each of these links to the main discussion thread on our discussion forum.Communication with people you love and new friends is free, secure and fast if you use Messenger. The announcements are also posted from the Twitter account, on the official subreddit, and in the official GrapheneOS chat rooms including the dedicated #releases: room for release announcements. The main place to discuss the releases are the threads posted on our our discussion forum with the Announcements tag. A release announcement indicates that the source code tags are available and that the official builds will soon be pushed out via the Alpha channel. Releases are announced on this page and included in an atom feed usable from any standard feed reader app. In general, it's not possible to downgrade unless a downgrade update package is generated, so use the Stable channel if you cannot tolerate dealing with temporary issues while a new release for the Beta channel is being created. In some cases, problems are caught during Beta channel testing and a new release is made via the Beta channel to replace the aborted one. Finally, the release is then pushed out via the Stable channel after being tested by some users using the Beta channel. The release is then pushed out via the Beta channel shortly afterwards. Releases are tested by the developers and are then pushed out via the Alpha channel. Verified boot and the hardware-backed keystore also act as a final layer of protection.
The internal payload for update_engine is also signed, providing another layer of signature verification and downgrade protection. Downgrade attacks are also prevented, and downgrades cannot be done unless a special downgrade update package has been signed with the release key. The update packages have an internal signature verified by the update client (or recovery when sideloading). Update packages are not for performing the initial installation and you should ignore incorrect guides trying to use them to install the OS. Those aren't currently linked below but may be in the future once they're being used more consistently. The over-the-air updates use delta update packages when available. A full update package can upgrade from any past version to the new version. GrapheneOS uses automatic over-the-air updates, but full update packages are listed below for uncommon use cases like never connecting the device to the internet. The factory images are used for the initial installation and can be verified with signify. These releases are available as both tags in the source code repositories and official builds.
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