{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9679149","patent":{"patent_number":"US-9679149","title":"Secret sharing system, data distribution apparatus, distributed data transform apparatus, secret sharing method and program","assignee":null,"inventors":[],"filing_date":"2013-07-04T00:00:00.000Z","publication_date":"2017-06-13T00:00:00.000Z","cpc_codes":["G06F","G06F","G06F","H04L","H04L","H04L"],"num_claims":6,"abstract":"A secret sharing system transforms shares in ramp secret sharing to shares in homomorphic secret sharing. On a data distribution apparatus, a division part divides information a into N shares fa(n) using an arbitrary ramp secret sharing scheme S1. On each of distributed data transform apparatuses, a random number selecting part generates a random number vector ri whose elements are L random numbers ri1. A first random number division part divides the random number vector into N shares fri(n) using a ramp secret sharing scheme S1. A second random number division part divides each of the L random numbers ri1 into N shares gri,1(n) using an arbitrary secret sharing scheme S2. A disturbance part generates a share Ui by using a share fa(i) and shares frλ(i). A reconstruction part reconstructs L pieces of disturbance information c1 from shares Uλ by using the ramp secret sharing scheme S1. A redivision part divides each piece of disturbance information c1 into N using the secret sharing scheme S2 to generate shares gc1(n). A transform part generates shares ga1(i) of the information a by using a share gc1(i) and the shares grλ,1(i)."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Secret sharing system, data distribution apparatus, distributed data transform apparatus, secret sharing method and program","description":"A secret sharing system transforms shares in ramp secret sharing to shares in homomorphic secret sharing. On a data distribution apparatus, a division part divides information a into N shares fa(n) us","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9679149","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-9679149","citation_suggestion":"Patentable. \"Secret sharing system, data distribution apparatus, distributed data transform apparatus, secret sharing method and program\" (US-9679149). https://patentable.app/patents/US-9679149","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9679149","json":"https://patentable.app/api/llm-context/US-9679149","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T04:55:28.955Z"}