Using NFC Phones for Proving Credentials

In this paper we propose a new solution for mobile payments called Tap2 technology. To use it, users need only their NFC-enabled mobile phones and credentials implemented on their smart cards. An NFC device acts like a bridge between service providers and secure elements and the secure credentials (on the card) are never revealed. In this way, secure authentication can be obtained by means of anonymous credentials, implemented on a smart card to provide the functionality with minimal data disclosure. We propose to use zero-knowledge proofs based on attribute-based anonymous credentials to provide the security and privacy requirements in mobile payments. Other use cases include online shopping, easy payment, eGoverment proofs etc.