CPC H04L 9/0822 (2013.01) [G01S 13/765 (2013.01); H04L 63/1441 (2013.01); H04W 12/03 (2021.01); H04W 12/041 (2021.01); H04L 9/0872 (2013.01); H04L 63/0428 (2013.01); H04L 63/0492 (2013.01)] | 20 Claims |
1. An electronic device comprising:
a ranging module including one or more ranging sensors, the ranging module coupled to a secure processing system through a hardware interface, the ranging module configured to:
receive at least one encrypted ranging session key;
decrypt the at least one encrypted ranging session key to generate a ranging session key;
generate a sparse ranging input;
derive, using a cryptographic engine, a message session key based on the ranging session key; and
derive, using the cryptographic engine, a derived ranging key via a key derivation function applied to the message session key and the sparse ranging input, the derived ranging key configured to encrypt data transmitted during a ranging session.
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