Silicon Valley-based cybersecurity firm Impermium has released the results of a Harris Interactive survey that show 93 percent of American Internet users have been victims of viruses, malware, or phishing, and that many are still reluctant to adopt two-factor authentification. While 79 percent of respondents said they were worried about their email being hacked, 75 percent have never signed into a website using two-factor authentication. [Source: Impermium]