{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9697340","patent":{"patent_number":"US-9697340","title":"System and methods with assured one-time, replay-resistant passwords","assignee":null,"inventors":[],"filing_date":"2015-06-14T00:00:00.000Z","publication_date":"2017-07-04T00:00:00.000Z","cpc_codes":["G06F","G06F","H04L"],"num_claims":35,"abstract":"An administrative system generates a sequence of passwords by iterative evaluation of a hash function, initiated from a private key value and continuing to a final, public key value. A current token is created that includes a current one of the passwords. A protected device tests the validity of the current password by inputting it to a hash function sub-chain. The current password is considered valid if, after hashing the current password n+1 times, where n corresponds to the number of tokens previously received, the result is a revealed value, such as a previously verified password of the public key value. At least one unit of a one-time programmable hardware device, such as processor fuses or anti-fuses, is then physically and permanently altered, thereby incrementing a count entry indicating the number of tokens received. The protected device performs a desired action only if the current password is verified."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"System and methods with assured one-time, replay-resistant passwords","description":"An administrative system generates a sequence of passwords by iterative evaluation of a hash function, initiated from a private key value and continuing to a final, public key value. A current token i","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9697340","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-9697340","citation_suggestion":"Patentable. \"System and methods with assured one-time, replay-resistant passwords\" (US-9697340). https://patentable.app/patents/US-9697340","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9697340","json":"https://patentable.app/api/llm-context/US-9697340","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T08:49:41.440Z"}