You should also turn on FileVault for additional security, because without FileVault enabled, your encrypted SSDs automatically mount and decrypt when connected to your Mac. The message is encrypted with some block cipher algorithm in CBC mode to create a chain of blocks such that each block depends on the proper encryption of the previous block. This content includes system files, apps, accounts, preferences, music, photos, movies, and documents.Īlways back up your content to a secure external drive or other secure backup location so that you can restore it, if necessary. TDES CBC-MAC A cipher block chaining message authentication code (CBC-MAC) is a technique for constructing a message authentication code from a block cipher. In other words, to confirm that the message came from the stated sender (its authenticity) and has not been changed. The advanced encryption technology integrated into the T2 chip provides line-speed encryption, but it also means that if the portion of the T2 chip containing your encryption keys becomes damaged, you might need to restore the content of your drive from a backup. In cryptography, a message authentication code (MAC), sometimes known as a tag, is a short piece of information used for authenticating a message. This encryption is performed with 256-bit keys tied to a unique identifier within the T2 chip. Data on the built-in, solid-state drive (SSD) is encrypted using a hardware-accelerated AES engine built into the T2 chip. Mac computers that have the Apple T2 Security Chip integrate security into both software and hardware to provide encrypted-storage capabilities.
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