A method for use in a wireless transmit/receive unit (WTRU), the method comprising: selecting a privacy profile, wherein the privacy profile includes privacy and security settings for each layer of a protocol stack of the WTRU, wherein the privacy and security settings include at least one of using anonymous dynamic host configuration protocol (DHCP) signaling parameters, the anonymous DHCP signaling parameters include a hostname, using a random medium access control (MAC) address, or using a random Internet protocol (IP) address; and instructing each layer of the protocol stack of the WTRU with the privacy and security settings based on the selected privacy profile.