A system for preventing IP (Internet Protocol) allocation to a cloned mobile communication terminal is provided, including: a mobile communication terminal generating a hash value obtained by hashing a user key inputted by a user and an ESN (Electronic Serial Number) with a hash function, and transmitting...http://www.google.ca/patents/US20070140196?utm_source=gb-gplus-sharePatent US20070140196 - System for preventing IP allocation to cloned mobile communication terminal
