SIGNATURE SEARCHING METHOD ACCORDING TO THE LOCATION OF SIGNATURE WITHIN A PACKET CAPABLE OF SHORTENING THE TIME CONSUMED IN SIGNATURE SEARCH AND SIGNATURE RANGE

摘要

PURPOSE: A signature searching method according to the location of signature within a packet is provided to process a signature search and signature rand search into one stage.;CONSTITUTION: Sub payload which will be compared with a signature from a payload of a packet is extracted(S100). An offset which is information within payload of a sub payload is generated(S200). A search key which comprises wih the extracted sub payload and the generated offset is generated(S300). A TCAM(Ternary Content Addressable Memory) matching is performed to check whether the search key generate in a TCAM entry matches or not(S400). The TCAM entry is comprised of offset, the information which signature must be located within the payload, and a signature.;COPYRIGHT KIPO 2011