Your device will never need to be replaced, because even if one payment key has been stolen, it can never be modified or re-used by the thief.

Also, since each payment key is unique from every other payment generated, having one or more payments stolen does not compromise the PocketKey device.

Even if a thief had access to thousands of previously used payment keys, they still would not have enough information to generate a new payment key since each payment is created using a unique encryption key.

With PocketKey, you will never have to replace your device, no matter how many merchants are hacked.