![]() Brute force attacks require time, so they usually start with an attacker getting unlimited access to the encrypted user data by stealing a device or copying the data out of a device after gaining temporary access. Protection from brute force attacksĪn important type of attack for password-based authentication is guessing the password by brute force. ![]() The resulting key is called the Vault Keyset Key (VKK) , and it is used to unlock user secrets, including the key to the user’s on-disk data. Password-based authentication takes the user’s password and, through a series of steps, generates a decryption key. Though the method is planned to be replaced with a unified approach used for passwords and PINs in the future, it has endured because it works with third-party security modules that don’t support Google-specific protocols. Its current implementation, though based on the same principles, is completely different from what came out with the first revision of the OS. Password-based authentication has gone through several modifications since it was launched to add new features and protections from new types of attacks. Let’s dive into the original authentication method ChromeOS supports, and has supported since its very first day: password-based authentication. The OS supports several authentication methods for sign-in, including providing a password or using a smart card, with more methods planned to be added in the future. To achieve that, ChromeOS encrypts the stored user data and only produces the decryption key when the user signs into the device. That starts with making sure user data stored on a Chromebook cannot be accessed by others, even if the Chromebook is lost or stolen. Providing a secure environment for our users is one of the core principles of ChromeOS.
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