{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11985005","patent":{"patent_number":"US-11985005","title":"Method for detecting CAN bus intrusion of vehicle-mounted network based on GMM-HMM and system","assignee":null,"inventors":[],"filing_date":"2022-07-22T00:00:00.000Z","publication_date":"2024-05-14T00:00:00.000Z","cpc_codes":["G06F","H04L","G06F","G06N","H04L","G06N","H04L","H04L","H04L","H04L"],"num_claims":11,"abstract":"The present disclosure provides a method for detecting controller area network (CAN) bus intrusion of a vehicle-mounted network based on a Gaussian mixture model-hidden Markov model (GMM-HMM), including the following steps: obtaining a normal packet of a CAN bus of a vehicle-mounted network, and counting cycles of all packets of each CAN ID based on a time sequence, that is, a time difference between two frames of packets of a same CAN ID, to form a cycle sequence as an input of an algorithm; dividing the cycle sequence of each CAN ID into a fixed length based on the algorithm, and then training a GMM-HMM for each CAN ID to obtain a likelihood probability of a normal cycle sequence; and further counting a cycle sequence of each CAN ID for a tested packet sequence, calculating, after the cycle sequence is input a model, a likelihood probability of generating the sequence, and determining whether the packet sequence is abnormal by comparing the likelihood probability with a threshold of the likelihood probability obtained in the previous step. In the present disclosure, anomaly detection of a packet cycle of a CAN bus is implemented, such that attack behaviors of inserting packets into the bus such as DoS, blur, and replay can be detected."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method for detecting CAN bus intrusion of vehicle-mounted network based on GMM-HMM and system","description":"The present disclosure provides a method for detecting controller area network (CAN) bus intrusion of a vehicle-mounted network based on a Gaussian mixture model-hidden Markov model (GMM-HMM), includi","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11985005","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-11985005","citation_suggestion":"Patentable. \"Method for detecting CAN bus intrusion of vehicle-mounted network based on GMM-HMM and system\" (US-11985005). https://patentable.app/patents/US-11985005","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11985005","json":"https://patentable.app/api/llm-context/US-11985005","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T17:25:50.033Z"}