Detection apparatus and spoofing detection method

A detection apparatus, comprising:

• a memory;
• and
• a processor coupled to the memory and the processor configured to:
• acquire an image data group in which a target person appears from a storage unit;
• identify a first behavior of the target person, of which a frequency of appearance is lower than a frequency of appearance of a second behavior by using the acquired image data group;
• and
• when it is detected that image data, in which the target person appears and which is displayed on a screen, has a suspicion of spoofing, output a message prompting the target person appearing in image data to take the identified first behavior.

A spoofing detection method, comprising:

• acquiring, by a computer, an image data group in which a target person appears from a storage unit;
• identifying a first behavior of the target person, of which a frequency of appearance is lower than a frequency of appearance of a second behavior by using the acquired image data group;
• and
• when it is detected that image data, in which the target person appears and which is displayed on a screen, has a suspicion of spoofing, outputting a message prompting the target person appearing in image data to take the identified first behavior.