The signature given back by the signing server is then unique and usable only by that particular T2 chip. Here’s how Apple describes the protection:Īt the time that software is downloaded and prepared to install, it is personalised with a signature that includes the Exclusive Chip Identification (ECID) - a unique ID specific to the T2 chip in this case - as part of the signing request. This is similar to FileVault, but even more secure as only the T2 chip can do the decryption – and security features on the chip prevent an attacker from modifying macOS to gain access. ![]() The key to T2 security is that the chip contains both an SSD controller and a crypto engine, allowing it to instantly decrypt and encrypt data on the fly. The method used is far slower than conventional password-cracking tools, but although the total time needed could run into thousands of years, that could fall to as little as 10 hours when the Mac owner has used a more typical password…Īpple introduced the T2 security chip in 2018, and it was used to provide a secure boot-up feature to Intel Macs from that year on. A company selling password-cracking tools says that a newly-discovered T2 Mac security vulnerability allows it to crack passwords on these machines, bypassing the lockouts.
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