1. A method for associating a biometric reference template with an identification tag for a physical object, said method comprising: ascertaining, by a processor of a computer system, that an attribute comprised by the identification tag is signed with a digital signature, said attribute comprising a privacy policy identifier which identifies a privacy policy pertaining to the identification tag, said identification tag embedded in or attached to a physical object, said identification tag comprising a first biometric reference template identifier that uniquely identifies biometric data pertaining to a person, said biometric reference template comprising a second biometric reference template identifier that uniquely identifies the biometric data; said processor confirming that the digital signature matches a signature stored in a database of the computer system; and said processor verifying that the first biometric reference template identifier matches the second biometric reference template identifier.