For password protection, Safari will support Mavericks' iCloud Keychain feature, Apple's new solution to multiple password storage. iCloud Keychain will remember website logins, credit card information (but not your security code), and Wi-Fi logins. Safari will remember your password for you, or auto-suggest a new password, and then sync it to your unique Keychain. iCloud Keychain syncs all of this information across all your systems, encrypted and securely.
The updated Safari will ride the wave of OS X Mavericks, when the latest OS update debutes this fall.
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