The querier (q) requests the object in the area protecting his/her location from the server.
Doohee Song, Moonbae Song, Kwangjin Park 2018, 'A Privacy-Preserving Spatial Index for Spatial Query Processing', Wireless Communications and Mobile Computinghttp://dx.doi.org/10.1155/2018/2067047. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)