{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8527139","patent":{"patent_number":"US-8527139","title":"Security systems and methods with random and multiple change-response testing","assignee":null,"inventors":[],"filing_date":"2012-08-28T00:00:00.000Z","publication_date":"2013-09-03T00:00:00.000Z","cpc_codes":["G06F","G06F","G06F"],"num_claims":20,"abstract":"A diagnostic system for a vehicle includes a first processor module and a second processor module. The first processor module includes a first microprocessor and memory. The second processor module includes a second microprocessor and memory. The second processor module: selectively transmits a first challenge to the first processor module for a first challenge-response test; selectively transmits a second challenge to the first processor module for a second challenge-response test; selectively transmits a third challenge to the first processor module for a third challenge-response test; selectively transmits a fourth challenge to the first processor module for a fourth challenge-response test; and selectively diagnoses a fault based on responses of the first processor module to the first, second, third, and fourth challenges. The first, second, third, and fourth challenge-response tests are each different types of challenge-response tests."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Security systems and methods with random and multiple change-response testing","description":"A diagnostic system for a vehicle includes a first processor module and a second processor module. The first processor module includes a first microprocessor and memory. The second processor module in","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8527139","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-8527139","citation_suggestion":"Patentable. \"Security systems and methods with random and multiple change-response testing\" (US-8527139). https://patentable.app/patents/US-8527139","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8527139","json":"https://patentable.app/api/llm-context/US-8527139","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T14:08:39.245Z"}