Google Online Security Blog: Google and Android have your back by protecting your backups
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The Wayback Machine - https://web.archive.org/web/20251105014714/https://security.googleblog.com/2018/10/google-and-android-have-your-back-by.html
Posted by Troy Kensinger, Technical Program Manager, Android Security and Privacy Android’s Backup Service and Google Cloud’s Titan Technology , Android has taken additional steps to securing users' data while maintaining their privacy.Titan security chip on our datacenter floor. The Titan chip is configured to only release the backup decryption key when presented with a correct claim derived from the user's passcode. Because the Titan chip must authorize every access to the decryption key, it can permanently block access after too many incorrect attempts at guessing the user’s passcode, thus mitigating brute force attacks. The limited number of incorrect attempts is strictly enforced by a custom Titan firmware that cannot be updated without erasing the contents of the chip. By design, this means that no one (including Google) can access a user's backed-up application data without specifically knowing their passcode.NCC Group’s findings, click here .We want to acknowledge contributions from Shabsi Walfish, Software Engineering Lead, Identity and Authentication to this effort
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