{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8543819","patent":{"patent_number":"US-8543819","title":"Secure authenticated distance measurement","assignee":null,"inventors":[],"filing_date":"2009-07-24T00:00:00.000Z","publication_date":"2013-09-24T00:00:00.000Z","cpc_codes":["H04L","G06F","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04W","H04W","G06F","H04L","H04L","H04W","H04W"],"num_claims":16,"abstract":"The invention relates to a method for a first communication device to performing authenticated distance measurement between said first communication device and a second communication device, wherein the first and the second communication device share a common secret and said common secret is used for performing the distance measurement between said first and said second communication device. The invention also relates to a method of determining whether data stored on a first communication device are to be accessed by a second communication device. Moreover, the invention relates to a communication device for performing authenticated distance measurement to a second communication device. The invention also relates to an apparatus for playing back multimedia content comprising a communication device."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Secure authenticated distance measurement","description":"The invention relates to a method for a first communication device to performing authenticated distance measurement between said first communication device and a second communication device, wherein t","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8543819","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-8543819","citation_suggestion":"Patentable. \"Secure authenticated distance measurement\" (US-8543819). https://patentable.app/patents/US-8543819","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8543819","json":"https://patentable.app/api/llm-context/US-8543819","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T06:34:41.557Z"}