A system is configured to receive a request for a customization packet associated with a user device; retrieve data associated with the device; encode portions of the network data using a group of keys, wherein each portion is encoded using a different one of the keys, and wherein each key corresponds to a different set of fields, of one or more sets of fields within the packet; store the encoded portions in the one or more sets of fields within the packet; and transmit, to a content provider, the packet, wherein the packet enables the content provider to decode all or a portion of the network data using one of the keys, and wherein all or the portion of the decoded network data enables the content provider to generate customized content for the device.