Malicious code patterns of an antivirus may be updated using public DNS (domain name system) servers. An update to the malicious code patterns may be generated and divided into several portions for inclusion in DNS records. The DNS records may be published for caching in public DNS servers. An update...http://www.google.com.hk/patents/US8171467?utm_source=gb-gplus-share專利 US8171467 - Updating of malicious code patterns using public DNS servers
