PATENT CLAIM ANALYSIS

Application Number: 16078770
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2019-01
Patent Classification: ["726", "006000"]

Abstract:
Procedures and a system for the ECUs within the vehicle to securely create and exchange session keys for further secure communication are disclosed. The procedures and system eliminate the need for securely tracking and storing all secret keys used on all vehicles. The procedures and system utilize public key cryptography to establish and maintain at least one session key and a set of shared secrets and challenges to facilitate use of private key cryptography within vehicle networks.

Claim (Index 3):
A method of updating a session key in a secure vehicle electronic control unit infrastructure, the method comprising the steps of:\n at a master, the master configured to store a session key, requesting a key establishment session with an electronic control unit comprising securely communicating a message and message authentication code in the request, the secure communicating being conducted using a current session key; at the electronic control unit, generating a random number, the random number being configured to verify that the master is in possession of an electronic control unit secret, the electronic control unit secret being configured to encrypt the electronic control unit random number using symmetric cryptography in a manner that only one in possession of the electronic control unit secret is able to decrypt the electronic control unit random number; at the master, decrypting the encrypted electronic control unit random number to arrive at the decrypted electronic control unit random number; at the master, generating a master random number configured to be a new session key, encrypting with the electronic control unit secret using symmetric cryptography the new session key and the decrypted electronic control unit random number and sending the encryption result to the electronic control unit wherein the electronic control unit decrypts the data from the master and securely stores the new session key only if the value of the returned random number matches the sent value.

Metadata:
- Claim Count in Document: 17.0
- Percentile: 96.0
- Lexical Diversity: 1.6
- Patent Class: 726.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15949494', '15202371', '14248253', '14315241', '13788784']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.2532269909425367
- 35 USC 102 Novelty (BERT): 0.4747301381281568
- Combined Prediction Score: 0.2753773056610987
- Mean Citation Score: 153.14095600000005
- Max Citation Score: 155.08441000000005
- Similarity Product: 107.68245400920873

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test