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리눅스 커널 쓰레드에 기반한 SSL 웹 암호화 가속기 개발
남의석 ( Nam Ui Seog ),민병조 ( Min Byeong Jo ),김학배 ( Kim Hag Bae ) 한국정보처리학회 2003 정보처리학회논문지 C : 정보통신,정보보안 Vol.10 No.6
We propose a kernel-level Secure Socket Layer (SSL) accelerator which significantly increases the processing rate of the SSL operation on a webserver. Because most of conventional SSL´s applied user threads for processing http requests, the CPU overhead, where the slow processing time are unavoidable. Our SSL accelerator, embedded in the kernel level, utilizes kernel threads as same number of CPUs. Thus, the webserver can allocate total CPU resources to handle the requests, which not only reduces switching time incurred from using system calls but also minimizes the send/receive operation on the network layer. To validate the effectiveness of our scheme, we evaluate its performance in comparison with the conventional Apache with/without our SSL accelerator. Consequently, the SSL accelerator improves the webserver performance by up to 200%.