Suppose you have an online social service like Facebook that might make it interesting for companies to create many accounts (e.g. to "Like" their posts).
Of course, you want to prevent the users to do something like that. Lets say, ideally you want at most one user per real person (I think there are company accounts in Facebook, but Facebook was only an example!).
How can you make sure, that no person is able to create and use multiple accounts? Are there publications about this topic? (Preferably free and publicly available)
Related questions
A similar question was asked here and I had many ideas how to approach this problem (see my answer). But although the question is similar, my focus in this question are references that discuss the topic. References might be blog articles and websites, but I would prefer papers / books.
Questions
- Are there publications
- that describe how to identify fake users in general?
- that describe how to use the social graph for identifying fake users?
- (Are there other ideas I did not list in my answer?)
Clarification
It doesn't matter if users create multiple accounts. It's ok if they create one account, use it, lose their credentials and create a new one they use.
It is not ok to create multiple accounts to manipulate counts (e.g. Like, +1, YouTube clicks, responses to an article, ...)
See my answers here and here. They don't refer to any specific publications, which I would be surprised to see, because of so different reasons why addressing this problem in first place (see these links for more discussion on that) and that post about being user-friendly.