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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
As a result of this disconnect, recent anecdotal and empirical evidence suggests that tabbed browser interfaces now engender significant challenges, popularly referred to as “tab overload’’
When the Tab Comes Due:Challenges in the Cost Structure of Browser Tab Usage
dl.acm.org
But very little evidence suggests that calling people out on Twitter, self-righteous indignation followed by cynical apology, is making the world a better place, and much suggests that the opposite is true, that Twitter’s pious mercilessness is generating nothing so much as a new and bitter remorselessness.
The Case Against the Twitter Apology | The New Yorker
Jill Lepore
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