PATENT CLAIM ANALYSIS

Application Number: 15866762
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-06
Patent Classification: ["713", "168000"]

Abstract:
A system and method for establishing a pairwise temporal key (PTK) between two devices based on a shared master key and using a single message authentication codes (MAC) algorithm is disclosed. The devices use the shared master key to independently compute four MACs representing the desired PTK, a KCK, and a first and a second KMAC. The Responder sends its first KMAC to the Initiator, which retains the computed PTK only if it verifies that the received first KMAC equals its computed first KMAC and hence that the Responder indeed possesses the purportedly shared master key. The Initiator sends a third message including the second KMAC to the Responder. The Responder retains the computed PTK only if it has verified that the received second KMAC equals its computed second KMAC and hence that the Initiator indeed possesses the purportedly shared master key.

Claim (Index 18):
An responder device for use in a body area network:\n a processor; and a memory coupled to the processor, the memory storing program instructions, which when implemented by the processor, cause the processor to perform an operation including:\n computing, by a responder device, a responder key confirmation key (KCK) by executing a cypher-based message authentication code (CMAC) on an responder master key (MK) and a first string including a responder address (Address_R), an initiator address (Address_I), a responder nonce (Nonce_R), and an initiator nonce (Nonce_I) based on a first pairwise temporal key (PTK) frame; \n computing, by the responder device, a responder key message authentication codes (PTK_KMAC_2B) and (PTK_KMAC_3B) by executing the CMAC on the responder KCK and a second string including the Address_I, the Address_R, the Nonce_I, and the Nonce_R; \n sending, by the responder device, a second PTK frame including the Address_I, the Address_R, a responder nonce (Nonce_R), the PTK index, and the PTK_KMAC_2B; and \n verifying, by the responder device, an initiator key message authentication code (PTK_KMAC_3A) with the PTK_KMAC_3B.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 86.0
- Lexical Diversity: 2.29851
- Patent Class: 713.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['14593628', '15378573', '12697080', '13208224', '13140632']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.4561624567465985
- 35 USC 102 Novelty (BERT): 0.6564902832925706
- Combined Prediction Score: 0.4761952394011958
- Mean Citation Score: 470.28689
- Max Citation Score: 657.4836
- Similarity Product: 589.6297128153562

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test