http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
박승제,황승준,나종필,백중환,Park, Seung-Je,Hwang, Seung-Jun,Na, Jong-Pil,Baek, Joong-Hwan 한국정보통신학회 2015 한국정보통신학회논문지 Vol.19 No.1
본 논문에서는 키넥트(Kinect)를 통해 얻은 깊이 영상에서 찾아낸 손가락의 끝점으로 임의의 3차원 공간인 공중에 그린 서명을 인식하는 알고리즘을 제안한다. 3차원 공간상에서 서명 궤적의 시프팅(Shifting), 스케일링(Scaling) 변화에 대응하기 위해 X, Y, Z좌표에 관한 각각 10개의 통계적 특징을 사용하였다. 인공신경망(Artificial Neural Network)은 기계학습 중 하나이며, 패턴인식 분야의 복잡한 분류 문제를 해결할 수 있는 도구로 사용되고 있다. 제안한 알고리즘을 실제 온라인 서명인식 시스템을 구현하여 적용하였고, 앞서 추출한 통계적 특징을 인공신경망의 입력값으로 사용하여 학습 과정을 거친 후 4가지 서명을 분류하는 것을 확인하였다. In this paper, we propose an on-line signature recognition algorithm using fingertip point in the air from the depth image acquired by Kinect. We use ten statistical features for each X, Y, Z axis to react to changes in Shifting and Scaling of the signature trajectories in three-dimensional space. Artificial Neural Network is a machine learning algorithm used as a tool to solve the complex classification problem in pattern recognition. We implement the proposed algorithm to actual on-line signature recognition system. In experiment, we verify the proposed method is successful to classify 4 different on-line signatures.
멀티 클라우드 기반의 안전한 기업 정보저장 시스템 설계 및 구현
박승제(Seung Je Park),김희열(Heeyoul Kim) 한국정보기술학회 2013 한국정보기술학회논문지 Vol.11 No.3
Although cloud computing has been adopted by many corporations, security is considered to be one of the most critical problems in the cloud computing environment. In this paper we focus on the security of corporation data to be stored in the cloud, and we present a secure data storage system for corporations not only providing confidentiality, integrity and availability of data but also avoiding vendor lock-in problem. The presented system utilizes cryptographic techniques to prevent disclosure of corporation data stored in the cloud and to provide confidentiality and integrity of the data. The system also utilizes multi-clouds and erasure code to improve availability and not to depend on one cloud provider. We expect the system contributes to the spread of cloud computing by corporations.
하이브리드 보안 프로토콜을 이용한 신뢰 클라우드 컴퓨팅 플랫폼 개선
박승제(Seung Je Park),김희열(Heeyoul Kim) 한국정보기술학회 2015 한국정보기술학회논문지 Vol.13 No.5
Security of cloud computing is considered one of major issues and users worry that their critical information is managed in the cloud not by themselves. Especially inside attackers of the cloud may access users data and maliciously modify computations. The trusted cloud computing platform was proposed to solve this problem, however it uses public key operations excessively causing performance degradation. In this paper we improve the existing model by presenting hybrid security protocols which blend public key operations and symmetric key operations. The proposed model guarantees the same security level with the existing model, and it reduces computation cost very significantly.
박승제(Seung-Je Park),김희열(Heeyoul Kim) 한국정보기술학회 2012 한국정보기술학회논문지 Vol.10 No.6
Cloud computing is one of the most interesting IT technologies and it takes the spotlight recently. In order to provide cloud computing, cloud providers have developed their own cloud solutions or have used open source frameworks. Especially Hadoop Framework is one of prominent frameworks used by major vendors such as Yahoo! and Facebook. However current version of Hadoop Framework has a lot of security vulnerabilities. In this paper, we propose One Time Token that prevents vulnerability of the Block Access Token which acts as a proof of user’s access right on data blocks. The presented model adds hash chain-based one time token to the Block Access Token, thus it prevents replay attack even though attackers eavesdrop Block Access Token during transmission. We analyze both security and performance of our model, which show that the vulnerability is prevented and additional overhead is not expensive.