{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9602278","patent":{"patent_number":"US-9602278","title":"Encryption device, cipher-text comparison system, cipher-text comparison method, and cipher-text comparison program","assignee":null,"inventors":[],"filing_date":"2012-05-29T00:00:00.000Z","publication_date":"2017-03-21T00:00:00.000Z","cpc_codes":["H04L","G06F","H04L"],"num_claims":11,"abstract":"An encryption device calculates a derived key by taking a document as a numerical value and corresponding identifier as input values and generates a cipher-text-by-identifier acquired by encrypting the document through a calculation taking the documents as input values, and a comparison unit generates relative values used for a greater-than-and-less-than comparison assessment between the plain text and another plain text through a calculation using a second hash function taking the derived key and plain text as input values, generates a relative value cipher-text through a calculation taking the derived key, the identifier, and the relative value as input values, generates a character string constituted with the cipher-text-by- identifier and the relative value cipher-text as a cipher-text, restores the relative values corresponding to the different cipher-texts through calculations using the second hash function, and performs a greater-than-and-less-than assessment on the encrypted different plain texts."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Encryption device, cipher-text comparison system, cipher-text comparison method, and cipher-text comparison program","description":"An encryption device calculates a derived key by taking a document as a numerical value and corresponding identifier as input values and generates a cipher-text-by-identifier acquired by encrypting th","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9602278","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-9602278","citation_suggestion":"Patentable. \"Encryption device, cipher-text comparison system, cipher-text comparison method, and cipher-text comparison program\" (US-9602278). https://patentable.app/patents/US-9602278","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9602278","json":"https://patentable.app/api/llm-context/US-9602278","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T12:03:27.728Z"}