Child pornography is one of the Internet’s most severe social problems, and it is a problem that no one likes to address or talk about. The National Center for Missing and Exploited Children (NCMEC) acknowledges that the scope of the child porn problem is too large for law enforcement, policy makers and child protection groups to handle on their own. This is one of the reasons Microsoft Research developed a new technology called PhotoDNA.

* Never give out personal information to someone you meet online like your real name, address, telephone number or the school you attend.

* Don't open files attached to e-mails from someone you don't know. They could contain a computer virus or material that could make you feel uncomfortable.