Last week, attackers hacked the Microsoft Safety and Security Center search engine to return adult-oriented results, studded with malware links. Blackhat search engine optimization (SEO), also known as search poisoning, involves filling search results at sites such as Google, Yahoo, or Microsoft Bing with fake results that link to advertisements or malware. About 22% of current news searches, as well as searches for “objectionable content,” return links to poisoned or infected websites, according to one study.”]