Implementation of Physical Layer Authentication Using Software Radio

摘要

Authentication is the process where claims of identity are verified and is a critical first step for sensitive communications. We propose a physical layer authentication technique that identifies radios based on their unique signal characteristics. The transmit signal is superimposed with a secret message-dependent authentication tag for the receiver to detect and validate. We present experimental results that indicate the usefulness of this technique: it has low impact on packet error, gives high quality authentication decisions, and is resistant to collisions.