Ip hardened universal device identifier

A server comprising:

• a memory including a UDID database;
• and
• an electronic processor configured to:
• receive an identification request regarding a currently-observed user device having a first set of attributes associated with the currently-observed user device, the first set of attributes does not include an IP address,
• generate an IP hardened UDID associated with the currently-observed user device based on the first set of attributes, and
• store the IP hardened UDID in the UDID database,
• wherein the generation of the IP hardened UDID compensates for an absence of the IP address in the first set of attributes.

A method for UDID generation, the method comprising:

• receiving, with an electronic processor, an identification request regarding a currently-observed user device having a first set of attributes associated with the currently-observed user device, the first set of attributes including an IP address of the currently-observed user device;
• generating, with the electronic processor, an IP hardened UDID associated with the currently-observed user device based on the first set of attributes;
• and
• storing, with the electronic processor, the IP hardened UDID in a UDID database,
• wherein the IP hardened UDID compensates for at least one selected from a group consisting of:
• changes in the IP address of the currently-observed user device over a period of time, and
• an absence of the IP address in the first set of attributes.