FIELD: information technologies.
SUBSTANCE: at guarded object at least one anti-intrusion sensor is installed and one mobile phone is present within guarded object. In the mobile phone memory subscriber phone number is stored to which message about intrusion to guarded object should be sent. Then mobile phone is switched on. When anti-intrusion sensor is actuated mobile phone is activated to send warning signal to stored subscriber phone number. Then audio signal is generated with some delay which signal attracting attention of person who entered the guarded object to audio signal source. With new time delay from audio signal source, indelible ink is sprayed towards this person. This makes the person to throw up his intentions.
EFFECT: mental and physical effects on person provide improvement of protective signaling efficiency.
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