and correctly believe that they’re far more exposed today than they were a generation earlier. From the user perspective, a willingness to provide personal information depends heavily on the level of anonymity of the information, its possible recipients, its possible uses or disclosures, and its storage and transmission security. From the provider perspective, user-generated content is a lucrative commodity and can be used for various commercial and medical purposes. The problem with HSNSs isn’t just that the privacy technology doesn’t exist but that system requirements aren’t formulated for the strong protection of personal data or aren’t implemented properly. Therefore, the most fundamental challenge to HSNS information privacy is “more system-related than technical.” However, several key system requirements can better ensure privacy.