## 4 Discussion
The monitoring process of self-adaptive privacy systems should not focus only to the user itself, but also to its social environment and its interconnections, in order to provide the proper features, since privacy protection within SNs presupposes a group-level coordination. Drawing up, therefore, on the results of our survey regarding their social attributes, privacy perceptions and management, indicatively the following privacy related requirements should be taken under consideration at the early design of self-adaptive privacy schemes within SNs, in order to support effectively their operations for monitoring, analysis and implementation:  
1. Adults SNs users, with high cultural and financial capital, value privacy in a high level and they indicate higher perceived privacy concerns regarding the ways of their personal information is handled and they cannot foresee or of the ways these can be misused. In this respect, self-adaptive privacy schemes should offer users proper justification and awareness about the privacy decision that they undertake. 2. Adults SNs users, despite their belonging to several social groups within SNs, they more often participate and communicate with Family and Friends groups. Since the belonging in these groups includes emotional involvement and a further level of trust among the members, self-adaptive privacy preserving schemes should provide users with the proper features that detect threats before disclosing information based on this frequent communication and trust among the group members within SNs. 3. Adult SNs users perceive their belonging to political groups within SNs of great importance. In this regard, self-adaptive privacy schemes should utilize framework models to identify these users' SNs environments and to provide the features that determine the value of such groups, so as to diagnose the privacy related threats. 4. Adults SNs users, despite the general low to medium level of social capital investment within SNs, give more emphasis in the bonding social capital and in particular in the resources provided for job references. Consequently, when users disclose information for such benefits, self-adaptive privacy schemes should provide them with the possibility of selective information disclosure. 5. Adults SNs users find SNs untrustworthy and they perceive highly the value of their information for these providers. In this regard, self-adaptive protection schemes should be adapted to the interoperability of SNs technologies and the structure of their systems, providing users with justifications regarding the SNs role on privacy risks, in order to take the right privacy decisions. 6. Adults SNs users perceive a low level of privacy control within SNs, and therefore self-adaptive privacy preserving schemes should provide them with further control capabilities and choices, in order to enhance their privacy awareness as well. 7. Adults SNs users co-manage personal information with other users within SNs due to belonging to multiple social groups, leading often to privacy implications. Self-adaptive privacy schemes should be able to analyze this co-management and to detect threats before information disclosure, calculating users' benefits in comparison to information disclosure costs. In the following scenario case, we may focus on an adult female user of Facebook, which belongs in a Family group, in a Friends group, and in political group, while seeking for a job and she has made a lot of applications. In that way, the user is characterized by multiple social identities, such as being a Mother, a Wife, a Political party member, and Unemployed. The user, despite of her privacy concerns, discloses personal information during executing everyday tasks in her daily routine for each one of these identities in her profile, since she has a low degree of privacy awareness of how this information is used. In some cases, other members of her groups disclose her personal information, uploading her photos for instance.