Alien Technology RFID Tag Signature Authentication Addresses Cloning

Alien Technology has implemented dynamic authentication as a feature on its Higgs-3 RFID chip, enabling data security to confront cloning. ...

... "Dynamic Authentication further enhances security of the Higgs-3 IC by incorporating a challenge/response algorithm which defeats static cloning attempts of the Higgs-3 IC. This innovative custom feature is a verification process comprising a dynamic interaction between the reader and the tag, and is a function of several parametric tag characteristics whereby the tag’s signature is challenged by the reader for Higgs-3 authenticity and confirmed by the host to provide customers with a cost effective, secure identification measure. " ...

Via Alien Technology: Higgs-3 RFID IC Security with Dynamic Authentication