Earticle

As time goes by, experts of recent society expect that aging era will be more severely. According to increase of senior patients at the same time, safety issues and plan for reaction are seriously emerging. Especially, because seniors living alone almost imposssible to cope with the faint, one of senile symptoms; the society requires the system that correctly detects the faint situation based on image data and reporting it to the situatioonal center at the same time. Therefore, this paper proposes the faint situation recognition and response system that continuously track certain seniors living alone in tracking algorithm of combination with Kalman Filter and Camshift, and analyzes change in size and shape traced object. And the system always can correctly object tracking and faint detection by using thermal cameras.

In this paper, we introduce AES, an international standard block cipher algorithm, and LEA, a new block cipher algorithm developed lately in Korea. LEA is evaluated as cryptographically secure algorithm. LEA has equal security strength to AES, and its performance is relatively lighter than AES. After comparing performance of AES and LEA, we assert that LEA is more efficient than AES in today’s real world. In our experiment, T-table AES, currently the most optimized AES, and our improved LEA are used. As a result, we conclude that performance of LEA is better than AES.

With the continuous development of the internet, there has been increasing research on reliability of data shared through the network. In particular, the focus on the public key infrastructure (PKI) that performs functions including verifying the sender’s identity and preventing forgery based on digital certificates has been intensifying rapidly. However, existing certificate-based PKI gives rise to various problems in terms of the Certificate Authority (CA), user, and domain name system (DNS). Moreover, certificate-PKI involves cost, an authentication environment, and security, and the existing PKI system uses CA, a hierarchical structure, to process certificates. This paper aims to devise a reliable address using the DNS security extension (DNSSEC) that applies security to the existing DNS, and proposes a certificate less-based PKI that uses DNSSEC. The proposed PKI can reduce the cost of the existing certificate and address existing vulnerabilities.