It is of the utmost importance that the main concepts and definitions regarding privacy and data protection are commonly understood among internet governance community. A lightning session could be a great opportunity to discuss some of the definitions that are defined in Council of Europe instruments and used by several countries already, and whether they are commonly understood the same way in an internet governance setting. How do the various jurisdictions and stakeholders define who is a data subject on the internet or who is a data controller and processor? This can have significant impact on public policy. The discussion around WHOIS data showed how difficult it could be to have a common understanding across all jurisdiction and stakeholders. These definitions can open up other field for discussion such as forced data localisation, data security and access rights in a cloud based service, just to name a few. The online moderator will facilitate the online chat session and raise comments in the in-situ meeting or invite online participants to take the floor if technically feasible.