Biometric. As a consumer, if my credit card data are stolen I can cancel them and get new cards. If my biometric data are stolen, I can't easily get new irisis or fingerprints (nor would I be willing to). Security for that reason must be much, much greater than we currently have.

If I'm building a device to store biometric data for your 'home garage door opener', I need to ensure that it can't be easily broken and those data used to access your bank account. Of course, a garage door opener won't have the resolution of a bank's biometric data, but another bank's database will. As might a building's security system.