Keychain iCloud is Apple’s commitment to not need to remember passwords
The keychain cloud service from Apple recalls all user names and password for websites you visit using the Safari browser, as well as all kinds of passwords of everyday life such as the password of the router Wi-Fi , or the number of a credit card. Everything under the AES encryption algorithm.
Safari also have a suggestion system passwords, with the idea that one does not need to remember long and complex passwords, then icloud will remember Keychain by one, avoiding the need to have them written in an unsafe place, as Apple joked in his presentation :
Link: WWDC 2013 in SlashGearTags: Apple, icloud, icloud keychain, WWDC, WWDC 2013