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Starting with A9 devices, the unique ID is generated by the Secure Enclave's random number generator and is never exposed outside of the device. This identifier is used to create a temporary key that encrypts the memory in this portion of the system. The Secure Enclave also contains an anti-replay counter to prevent brute force attacks. [1]
Later in the year the release of the blackbird SEP vulnerability further compounded the impact of the defect by allowing arbitrary code execution in the T2 Secure Enclave Processor. [26] This had the impact of potentially affecting encrypted credentials such as the FileVault keys as well as other secure Apple Keychain items.
In Unix-like operating systems, /dev/random and /dev/urandom are special files that serve as cryptographically secure pseudorandom number generators (CSPRNGs). They allow access to a CSPRNG that is seeded with entropy (a value that provides randomness) from environmental noise, collected from device drivers and other sources.
The Secure Enclave initiative is designed to ensure a secure supply of microelectronics for defense requirements, aligning with the Department of Defense's enduring need for state-of-the-art ...
[1] [2] SGX is designed to be useful for implementing secure remote computation, secure web browsing, and digital rights management (DRM). [3] Other applications include concealment of proprietary algorithms and of encryption keys. [4] SGX involves encryption by the CPU of a portion of memory (the enclave).
SHSH blobs are created by a hashing formula that has multiple keys, including the device type, the iOS version being signed, and the device's ECID. [5] [non-primary source needed] When Apple wishes to restrict users' ability to restore their devices to a particular iOS version, Apple can refuse to generate this hash during the restore attempt, and the restore will not be successful (or at ...
The default keychain file is the login keychain, typically unlocked on login by the user's login password, although the password for this keychain can instead be different from a user's login password, adding security at the expense of some convenience. [5] The Keychain Access application does not permit setting an empty password on a keychain.
A High Assurance Internet Protocol Encryptor (HAIPE) is a Type 1 encryption device that complies with the National Security Agency's HAIPE IS (formerly the HAIPIS, the High Assurance Internet Protocol Interoperability Specification).
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