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Detection of a hand holding a cellular phone was developed to recognize whether someone is using a cellular phone while operating an automated teller machine (ATM). The purpose is to prevent money transfer fraud. Since a victim is told a bogus reason to transfer money and how to operate the machine through a cellular phone, detecting a working cellular phone is necessary. However, cellular phone detection was not realistic due to variable colors and shapes. We assumed that a user΄s hand beside the face was holding a cellular phone and decided to detect it. The proposed method utilizes color, shape, and motion. Color and motion were used to compare the input to the face. Shape was used to compare the input to the standard hand pattern. The experimental result was a detection rate of 90.0% and a false detection rate of 3.2%, where 7,324 and 20,708 images were used respectively. [ABSTRACT FROM AUTHOR]

The security problem of screen image leakage on a cathode-ray tube (CRT) through electromagnetic radiation from several meters away, ˵transient electro-magnetic pulse emission surveillance technology″ (TEMPEST), has attracted wide interest by security researchers since Van Eck wrote about this problem. On the industry side, the problem is considered a serious risk, especially for computers used in operations related to such areas as critical business and information management at banks. To solve the problem, techniques for reducing the S/N ratio of emanating information by signal reduction and noise generation have been investigated as countermeasures. We have developed a technique that introduces noise to displayed images. With this technique there is less of a quality penalty on the visible images. This is a result of using a human visual characteristic known as additive color mixing, which occurs when an eye is continuously exposed to quickly changing colors. Although we used hardware to implement this technique, using software for low-cost systems is possible. We tested and confirmed the effectiveness of the technique using both analog and digital systems: a computer connected with a CRT or LCD by an analog RGB cable. [ABSTRACT FROM AUTHOR]