{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11308242","patent":{"patent_number":"US-11308242","title":"Method for protecting encrypted control word, hardware security module, main chip and terminal","assignee":null,"inventors":[],"filing_date":"2018-02-09T00:00:00.000Z","publication_date":"2022-04-19T00:00:00.000Z","cpc_codes":["G06F","G06F","H04L","H04L","H04L","H04N","H04N","H04N","H04N"],"num_claims":15,"abstract":"Provided is a method for protecting an encrypted control word. The method includes: receiving a hardware security module entitlement management message and an encrypted control word transmitted from a main chip, where the hardware security module entitlement management message includes a key for decrypting the encrypted control word; decrypting, based on the hardware security module entitlement management message and a hardware security module root key stored in the hardware security module, the encrypted control word to obtain a control word; reencrypting the control word based on a re-encryption key stored in the hardware security module to obtain a reencrypted control word; and transmitting the reencrypted control word to the main chip, so that the main chip decrypts, based on a main chip entitlement management message transmitted from the front end, the reencrypted control word to obtain the control word."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method for protecting encrypted control word, hardware security module, main chip and terminal","description":"Provided is a method for protecting an encrypted control word. The method includes: receiving a hardware security module entitlement management message and an encrypted control word transmitted from a","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11308242","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-11308242","citation_suggestion":"Patentable. \"Method for protecting encrypted control word, hardware security module, main chip and terminal\" (US-11308242). https://patentable.app/patents/US-11308242","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11308242","json":"https://patentable.app/api/llm-context/US-11308242","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T06:24:07.049Z"}