Definition
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
- Password storage: Keychain stores passwords for various applications and websites on your Apple device.
- Storing credit card details and notes: A keychain enables you to store your notes and credit card details within reach.
- Auto-filling passwords and web forms: Keychain allows auto-filling for easier account access, registration, and online shopping on the Safari browser.
- Generating unique passwords: You can use Keychain to generate unique passwords with random symbols to protect your accounts.
- Evaluating password strength: Keychain can evaluate your passwords’ strength to determine vulnerabilities in your defenses.
Pros and Cons of Keychain
Pros
- Keychains are simple to use
- Handles two-factor authentication natively
- Supports passkeys
Cons
- Does not support non-Apple platforms
