You have control of your own data.
On applying for a place at the Summit you will be asked to opt-in; the default is that no permission has been granted.
Where you grant permission, your attendee details will be shared with the sponsors of any Discussion Tables you join, and any co-organiser sponsors.
NB. We never share phone numbers; where we ask for them on the registration form, it is so that we (the event organisers) can contact you regarding the conference.