A measure of Loran location-based information

In cryptography, a verification tag is a piece of information used to authenticate a message. In geoencryption, location-based information is defined as the amount of information that can be used to construct a verification tag or "geotag" to identify one's location. The term "geoencryption" or "location-based encryption" refers to a security algorithm that limits the access or decryption of information content to specified locations and/or times. Loran is chosen as a case study to implement geoencryption due to its many properties that are beneficial to this protocol. The security of a geoencryption system resides in the geotag. In order to evaluate the security level of geoencryption system, we develop a mathematical framework to measure the information content of Loran location-based parameters.