Dr.Takeshi Kumaki of Takeshi Kumaki, Dept. of Electronic and Computer Engineering Ritsumeikan University

Study on LSIs for mobile equipment and its multi-media security application

 ☆Study for the development and application of ultra-parallel SIMD type arithmetic processors.☆
. Develop low power consumption SIMD type arithmetic processor for multimedia processing enabling a maximum of 2,048 data to be processed in parallel, for effective image, encryption, and detection processing studies. 

☆ Studies for performance enhancements on associative memory and its application☆
. Propose and develop multiport associated memory to check database in parallel. Multiport associated memories have multiple I/O ports unlike normal associated memories, and is known to achieve high speed network routing. 

☆ Development of hardware hacking proof secure LSI to prevent information leaks from Hardware Trojan Horse ☆
In recent years, there are concerns for circuits known as hardware Trojan horse (HTH) that are incorporated by the hands of LSI terrorists becoming a realistic threat. Currently, related studies are being conducted with the US in the center, but is still in its very early stages in Japan. In this study, surveys will be made on related status and research, a verification board shall be developed, to create an HTH that will be incorporated into triple DES and AES encryption circuit to check the damage caused by the invalidation of encryption process and the outflow of the private key. Furthermore, a circuit to monitor operations effectively on an architecture level will be developed. 

☆ Development of layered type image masking technology for privacy protection from security cameras
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. Many security cameras are installed around us for crime prevention however, personal information such as the face of a person, is being shot without any notice, and the method of their handling largely remains unclear. In this study, the face, etc., of the individual in the shot image is automatically masked by a technology known as HMF developed to protect the information, while allowing the masking to be removed in accordance with the authorization granted to be viewer. 

☆ Study for a digital watermarking technology for mobile equipment using morphological wavelet conversion.☆
Digital watermarking is a technology to incorporate information, such as copyrights, etc., into images. This study has developed a method to incorporate information swiftly and safely for mobile equipment based on morphological wavelet conversion. This technology is resistant to compression or cut-out attacks and is possible to process it at high speed. 

☆ Study of image falsification detection technology using morphological pattern spectrum☆
Wile digital images are easy to handle, on the other hand, it can be easily falsified by others. This being the case, in many cases, its authenticity is contested in courts. In this study, a technology has been developed to detect minor falsifications while noise and rotation are not judged to be falsifications, and is aimed at closing the gap between falsification detection judged by human beings. 

☆ Development of secret photography prevention technology using visual light communications and image sensor.☆
With the spread of mobile phone cameras, secret photography and digital shoplifting is becoming rampant. In this study, jamming technology using visual light communication and image processing is developed to prevent these kinds of damage. This will be used to identify the restricted area and to freely select the restriction functions to achieve much secure photography. 

☆ Development of low power consumption sensor node GSSE mounted with infra-red array sensor and image sensor.☆
Mounting of image sensors was difficult for sensor nodes as low power consumption was required. In this study, a drastic reduction in power consumption has been achieved by allowing image to be acquired only when an event is detected by developing an effective person detection method by the addition of an infra-red sensor.

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Address:Takeshi Kumaki Associate Professor, Dept. of Electronic and Computer Engineering , Ritsumeikan University, Kyoto, Japan