Security researchers have mixed opinions about the new password manager Apple has included with Mavericks. The new iCloud Keychain stores all website usernames and passwords, credit card numbers and Wi-Fi network information. The data is protected through 256-bit AES encryption. Third-party password managers with similar and more advanced features include LastPass and 1Password. Apple’s manager could become popular among customers who use multiple devices from the vendor, experts say. But some experts didn’t like Apple letting people choose to create only a four-digit security code.”]