is a password management system created by Apple for iPhone/iPad/Mac.

iCloud keychain is apple's password management system for iPhone/iPad/Mac. With this function, the user's account name, password and credit card number can be safely stored in iCloud and synchronized on all devices. When using Safari browser, you can also use iCloud keychain to fill in the required information through biometrics.

and it will automatically remember some information, so you don't need to remember this information. It will automatically fill in information on any device you approve, such as your Safari browser user name and password, credit card, Wi-Fi network and social login information.

summary.

in a word, iCloud keychain is a cloud service that can help users manage, such as website account passwords and credit card numbers, and it is secure enough, but currently it only supports Safari browsers on iOS and MacOS platforms.

apple officially added the keychain function in iOS 7, and it has become what it is today after several versions of it. ICloud "keychain" can automatically save passwords, generate strong passwords and other functions. While ensuring security, there is no need for users to remember passwords in various apps, which reduces the trouble of resetting passwords.