{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8474034","patent":{"patent_number":"US-8474034","title":"Method and apparatus for fast check and update of anti-replay window without bit-shifting in internet protocol security","assignee":null,"inventors":[],"filing_date":"2011-04-19T00:00:00.000Z","publication_date":"2013-06-25T00:00:00.000Z","cpc_codes":["H04L","H04L","H04L"],"num_claims":17,"abstract":"An apparatus comprising a processor configured to implement an anti-replay check for a plurality of received packets and a plurality of corresponding sequence numbers; and a circular buffer coupled to the processor and comprising a bitmap, wherein the bitmap is slided in a circular manner by updating a low index that points to a first sequence number for a first received packet and a high index that points to a last sequence number for a last received packet without bit-shifting, and wherein, when the update results in the new value of one of the low index and the high index exceeding the end of the circular buffer, the one of the low index and the high index wraps around from the beginning of the circular buffer."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and apparatus for fast check and update of anti-replay window without bit-shifting in internet protocol security","description":"An apparatus comprising a processor configured to implement an anti-replay check for a plurality of received packets and a plurality of corresponding sequence numbers; and a circular buffer coupled to","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8474034","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-8474034","citation_suggestion":"Patentable. \"Method and apparatus for fast check and update of anti-replay window without bit-shifting in internet protocol security\" (US-8474034). https://patentable.app/patents/US-8474034","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8474034","json":"https://patentable.app/api/llm-context/US-8474034","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T11:53:49.856Z"}