Keychain is a password management system for storing information like cryptographic keys, passwords, and notes, for Mac OS 8.6+ and iOS 7+ devices. You can access this data across your devices if you log into the iCloud with your Apple ID.

It uses AES 256-bit encryption to protect the stored information, making it impossible to hijack it even with a brute-force attack. Unfortunately, Apple’s advanced and widespread system adoption presents vulnerabilities that cybercriminals can exploit. For instance, Linus Henze, a German security researcher, revealed a way to access passwords from Keychain.

Use Cases of Keychain

Pros and Cons of Keychain