DeepCover® secure NFC/RFID transponders (tags) and transceivers (readers) employ a bidirectional security model to enable the most secure contactless communication possible. Our RFID transceiver IC includes a Secure Hash Algorithm-256 (SHA-256) secure authenticator coprocessor based on the FIPS 180-4 standard. When paired with our NFC transponder ICs, the bidirectional security model enforces two-way authentication. Each NFC tag includes a unique 64-bit ROM ID and UID that serves as an electronic serial number within the application. Our secure NFC tags and RFID readers empower new industrial and medical applications, such as node-device secure authentication, automated device configuration, usage limit setting, and sensor-tag implementation.