{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8528054","patent":{"patent_number":"US-8528054","title":"Multi-step challenge-response test","assignee":null,"inventors":[],"filing_date":"2010-08-31T00:00:00.000Z","publication_date":"2013-09-03T00:00:00.000Z","cpc_codes":["G06F","G06F"],"num_claims":18,"abstract":"A method of obtaining access to an Internet service using a multi-step challenge response test is presented. The method calculates a threshold probability for access to the Internet service and generates a number of challenge-response tests. Each of the challenge-response tests is rendered on a display of a client device. An input corresponding to the response to one of the challenge-response tests is received and an authentication probability is calculated after each response. The authentication probability is evaluated after each response and if the authentication probability is higher than the threshold probability access to the Internet service is provided."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Multi-step challenge-response test","description":"A method of obtaining access to an Internet service using a multi-step challenge response test is presented. The method calculates a threshold probability for access to the Internet service and genera","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8528054","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-8528054","citation_suggestion":"Patentable. \"Multi-step challenge-response test\" (US-8528054). https://patentable.app/patents/US-8528054","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8528054","json":"https://patentable.app/api/llm-context/US-8528054","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T17:18:23.415Z"}