The extension of the self brings with it an entire new dimension of security concerns. As we extend our technosocial selves online, our brains and extended selves become open to social and physical access. Cyborg Security is a phrase used to describe a set of practices and tools for protecting the extended self and its data. As researcher danah boyd discovered, some teenagers are known to disable their Facebook accounts when they go offline. This is to prevent people from posting on their wall when they're not there to defend it. This practice, also known as "super-logoff" is an example of a risk reduction strategy on Facebook.