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Heterogeneity of Web objects is the important causes of the decrease the performance of web caching algorithms. To increase the throughput of web caching process and to improve service availability, we may consider heterogeneity of web object adaptively. In this study, we proposed the new web-caching algorithm. A heterogeneity variation of an object can be reduced as the proposed method dividedly managing. Web objects and a cache scope with heterogeneity, and it is adaptively reflecting a variation of object reference characteristics with the flowing of time. In the experiments, we verified that the performance of the proposed method was more improved than existing algorithms through the two experiment models, which considered heterogeneity of an object. [ABSTRACT FROM AUTHOR]

The illegal distribution of duplicated contents on the Web is causing digital content providers great economic loss. Therefore, Information security is becoming a more important factor in distribution of digital contents. In this study, we designed a digital contents distribution system based on the public key techniques in hierarchical web caching structures. The superior performance of the proposed system has been proven in the experimental tests. The results of experiment show that the supposed system improved the security of DC without decreasing process speed and improved user convenience. [ABSTRACT FROM AUTHOR]