{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11995191","patent":{"patent_number":"US-11995191","title":"Side-channel attack on HMAC-SHA-2 and associated testing","assignee":null,"inventors":[],"filing_date":"2021-08-11T00:00:00.000Z","publication_date":"2024-05-28T00:00:00.000Z","cpc_codes":["G06F","G06F","H04L","H04L","H04L","G06F","H04L"],"num_claims":32,"abstract":"A method for testing an HMAC implementation for vulnerability to a side-channel attack can include mounting a template attack. The attack can include generating, based on first side-channel leakage information associated with execution of a hash function of the HMAC implementation, a plurality of template tables. Each template table can correspond, respectively, with a subset of bit positions of an internal state of the hash function. The attack can further include generating, based on second side-channel leakage information, a plurality of hypotheses for an internal state of an invocation of the hash function based on a secret key. The method can further include generating, using the hash function, respective hash values generated from each of the plurality of hypotheses and a message. The method can also include comparing each of the respective hash values with a hash value generated using the secret key to determine vulnerability of the HMAC implementation."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Side-channel attack on HMAC-SHA-2 and associated testing","description":"A method for testing an HMAC implementation for vulnerability to a side-channel attack can include mounting a template attack. The attack can include generating, based on first side-channel leakage in","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11995191","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-11995191","citation_suggestion":"Patentable. \"Side-channel attack on HMAC-SHA-2 and associated testing\" (US-11995191). https://patentable.app/patents/US-11995191","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11995191","json":"https://patentable.app/api/llm-context/US-11995191","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T13:45:50.067Z"}