{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9846788","patent":{"patent_number":"US-9846788","title":"Semiconductor integrated circuit and system","assignee":null,"inventors":[],"filing_date":"2014-06-26T00:00:00.000Z","publication_date":"2017-12-19T00:00:00.000Z","cpc_codes":["G06F","G06F","G11B"],"num_claims":18,"abstract":"To raise confidentiality of the value stored in the ROM, in an IC having a built-in or an externally-attached ROM storing a value (program and/or data) encrypted using a predetermined cryptographic key. The IC includes the ROM storing the encrypted value (program and/or data), a unique code generating unit, and a decrypting unit. The unique code generating unit generates a unique code specifically determined by production variation. The decrypting unit calculates a cryptographic key on the basis of the generated unique code and a correction parameter, and decrypts the encrypted value readout from the ROM by using the calculated cryptographic key. The correction parameter is preliminarily calculated outside the IC, on the basis of an initial unique code generated from the unique code generating unit immediately after production of the IC, and the predetermined cryptographic key used for encryption of the value to be stored in the ROM."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Semiconductor integrated circuit and system","description":"To raise confidentiality of the value stored in the ROM, in an IC having a built-in or an externally-attached ROM storing a value (program and/or data) encrypted using a predetermined cryptographic ke","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9846788","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-9846788","citation_suggestion":"Patentable. \"Semiconductor integrated circuit and system\" (US-9846788). https://patentable.app/patents/US-9846788","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9846788","json":"https://patentable.app/api/llm-context/US-9846788","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T15:38:57.295Z"}