Sensor nodes in wireless sensor network are densely deployed to monitor the physical world. In distributed access control user can directly access data from sensor nodes. While accessing data from sensor nodes user details can be caught by sensor nodes. It adversely affects the user privacy. A user does not want the wireless sensor network to associate his details while he accessing data from sensor nodes. The mechanisms that considering the privacy of user is so limited. DP2AC, Priccess are the two mechanisms that protect the privacy of the user. These two approaches consider different techniques to preserve privacy of user access control.