When NFC tag content is dynamic, the company explains, the tags provide protection against cloning. The growing demand for such solutions has faced a scalability challenge, it says. While NFC tags have been deployed for consumer engagement as an extension of a typical HF RFID use case, the authentication component adds cost and complexity. The em|linq combines cryptographic mechanisms typically used in smart-card products with RFID technology. It is built on open standards, allowing flexibility in the authentication service's implementation.