{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-10491381","patent":{"patent_number":"US-10491381","title":"In-field system test security","assignee":null,"inventors":[],"filing_date":"2017-06-29T00:00:00.000Z","publication_date":"2019-11-26T00:00:00.000Z","cpc_codes":["H04L","G06F","G06F","H04L","H04L","H04L"],"num_claims":25,"abstract":"A processor, including: a core; system test circuitry, the system test circuitry configured to be locked except during an in-field system test (IFST) mode; IFST control circuitry; and a test interface controller, including: a data interface to receive a test packet; a parser to parse the test packet into a key, a signature, and a stored hash-of-hashes; a decryption circuit to decrypt the signature according to the key and to generate a computed hash-of-hashes; a hash circuit to verify the stored hash-of-hashes against the computed hash-of-hashes; and an IFST interface, wherein the test interface controller is to signal the IFST control circuitry to place the system test circuitry in IFST mode."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"In-field system test security","description":"A processor, including: a core; system test circuitry, the system test circuitry configured to be locked except during an in-field system test (IFST) mode; IFST control circuitry; and a test interface","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-10491381","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-10491381","citation_suggestion":"Patentable. \"In-field system test security\" (US-10491381). https://patentable.app/patents/US-10491381","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-10491381","json":"https://patentable.app/api/llm-context/US-10491381","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T19:45:12.808Z"}