Apple announced a new service called Apple Pay yesterday and it works to replace traditional credit cards by using your iPhones (iPhone 6 and 6 Plus with NFC inside) instead. For security and authentication Apple Pay can also rely on the Touch IDs on these iPhones. But Apple Pay is also available on the Apple Watch and users with older iPhones (iPhone 5 onwards) can pair their Apple Watch with their phones to take advantage of Apple Pay. But while the iPhone has Touch ID what about the Apple Watch, there is to Touch ID on Apple Watch. Multiple sources in the media (via MacRumors) have confirmed that Apple Watch will use the sensors on its back that are in contact with the skin of the users for authentication, similar to Touch ID. That makes more sense. Of course you can also enter a PIN instead from the Apple Watch (similar to how iPhones require your passcode after being powered down). Whatever it is Apple is the only company out there that cares about security and privacy of the user data, the most and from Day 1 their model has been privacy and security first, rest... next. But even Apple can't do miracles and this is not magic and hence is crackable so eventually your security and privacy is in your hands and your safe practices!