There are many security issues with the social network sites. Users have the right to post information as they like, but is the information they are putting up secure? How easy is it for others to access and change the information on their sites?
There are other security issues that may not be of interest in this project. There is the inappropriate and often illegal use of these sites for interacting with and in some cases preying on the vulnerable users of the sites. There is also the distribution of malicious software through social networks. One example logs out users who view a compromised page for several seconds, and another sends unauthorized friend requests from the target users. For more information, see Technology Review article.