Reports of a massive 100 million account data leak at T-Mobile should encourage any Apple user to double-check password and account security. Here’s how to do that using Keychain.
iCloud Keychain to the rescue
Apple’s built-in password manager is called iCloud Keychain. It securely stores your saved account information such as account names and passwords across all your signed-in devices. It will automatically enter this information for you when you access an app or service.