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When FileVault is disabled, data on protected volumes is still encrypted using a volume encryption key (VEK), which is protected by a hardware key and a xART key used to protect from replay attacks. When FileVault is enabled, the same VEK is used, but it’s protected by a key encryption key (KEK), and the user password is required to unwrap that KEK, so protecting the VEK which is used to perform encryption/decryption. This means that the user can change their password without the volume having to be re-encrypted, and allows the use of special recovery keys in case the user password is lost or forgotten.
Explainer: FileVault
eclecticlight.co
This generally works out of the box in traditional, server-side apps, but is often overlooked in client-side apps, especially single-page apps that implement continuous scrolling or AJAX search.
The UX of URLs
shalvah.me
At one level, the ethic of efficacy is the ethic that governs the use of news as currency. But if we sort of put that aside for a minute, it is an ethic that I think emerges in an era where the classic business models of the news industry no longer apply.
The 'Alternate Ethics' of Chinese Journalism - China Media Project
chinamediaproject.org
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