Patent ID: 8521132

Claim:
An abnormality detection apparatus for communication terminal, comprising: a pattern model storage unit configured to store behavior pattern models as a probabilistic model of transition relations of events relevant to operations and calls on a communication terminal, the behavior pattern models include a normal behavior pattern model that represents normal behavior of a user, and an abnormal behavior pattern model that is constructed with events extracted from the normal behavior pattern as factors of a higher degree of abnormality; a terminal information obtaining unit configured to detect terminal information about the operations and the calls on the communication terminal; a pattern determination unit configured to determine whether or not a current behavior pattern is a normal behavior pattern by comparing the terminal information detected by the terminal information obtaining unit with the behavior pattern models stored in the pattern model storage unit, wherein the abnormal behavior pattern model is used when the communication terminal is engaged with a call; and a warning generation unit configured to output predetermined warning information to the communication terminal when the pattern determination unit determines that the terminal information detected by the terminal information obtaining unit is not within a normal behavior pattern.