Most operating systems services generate log files that can be used for debugging and supervision. One important function of log files is logging security related or debug information, for example logging unsuccessful authentication or error logging. This paper shows how to implement an anomaly detection process of web server’s unexpected events using the the Apache web server’s logs and applyi...

INTRODUCTION The advent of a commercial electromagnetic (EM) multicomponent borehole logging tool with capabilities to measure electric anisotropy, has spearheaded efforts to simulate numerically the tool’s response in complex 3D logging environments (Wang and Fang, 2001; Avdeev et al., 2002; and Newman and Alumbaugh, 2002). Modelling formation electric anisotropy effects is of significance to ...

With the number of computing elements spiraling to hundred of thousands in modern HPC systems, failures are common events. Few applications are nevertheless fault tolerant; most are in need for a seamless recovery framework. Among the automatic fault tolerant techniques proposed for MPI, message logging is preferable for its scalable recovery. The major challenge for message logging protocols i...

Logging is a central service in computing systems. It lays the foundation for accountability and audit services in computing systems, as well as for other accessory services. While providing logging services in traditional computing systems is a relatively smooth process, it turns to an intricate task in pervasive computing systems. In this context, we present two contributions addressing this ...

This paper proposed a novel method to protect logging information more securely. The method, named NIGELOG, produces multiple backups of the logging information, hides them in arbitrary directories, and periodically moves these backups to other directories. Also, NIGELOG can automatically restore the original logging information by using the backups even if the original le is altered or deleted...