Communication apparatus and method for secure low power transmission
AssigneePanasonic Intellectual Property Corporation of America
InventorsRojan Chitrakar, Lei Huang, Yoshio Urabe
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Abstract
The present disclosure provides a communication apparatus comprising a cryptographic circuitry which, in operation, uses a shared cryptographic secret Key and a cryptographic salt to generate a cryptographically encoded Message Integrity Code (MIC) that is computed over the address field of a Wake Up Radio (WUR) frame; and a transmission signal generator which, in operation, generates a secure WUR signal by replacing the address field of the WUR frame with the MIC; and a transmitter which, in operation, transmits the secure WUR signal.
Claims12
A communication apparatus comprising:
- circuitry which, in operation, uses both a temporal key and a first part of a Timing Synchronization Function (TSF) timer of the communication apparatus as inputs to compute a Message Integrity Code (MIC);
- and
- a transmitter which, in operation, transmits, to a station associated with the communication apparatus, a Wake-Up Radio (WUR) frame with the MIC, wherein:
- the WUR frame includes a second part of the TSF timer of the communication apparatus for time adjustment and does not include the first part of the TSF timer of the communication apparatus for MIC verification,
- the WUR frame wakes up the station associated with the communication apparatus,
- the communication apparatus maintains the TSF timer and the station maintains a station TSF timer, and
- the station receives the WUR frame and uses the station TSF timer to generate a local MIC for comparison with the MIC included in the received WUR frame.
A communication method implemented by a communication apparatus, the communication method comprising:
- using both a temporal key and a first part of a Timing Synchronization Function (TSF) timer of the communication apparatus as inputs to compute a Message Integrity Code (MIC);
- and
- transmitting, to a station associated with the communication apparatus, a Wake-Up Radio (WUR) frame with the MIC, wherein:
- the WUR frame includes a second part of the TSF timer of the communication apparatus for time adjustment and does not include the first part of the TSF timer of the communication apparatus for MIC verification,
- the WUR frame wakes up the station associated with the communication apparatus,
- the communication apparatus maintains the TSF timer and the station maintains a station TSF timer, and
- the station receives the WUR frame and uses the station TSF timer to generate a local MIC for comparison with the MIC included in the received WUR frame.
Dependencies are inferred from the claim text.