Other

Hitachi, Ltd.

Miki Niimura

Shuji Fujino

Akihiro Urano

Mitsugu Yamada

Shinji Morita

Kazuyoshi Morikawa

Satoshi Miyazaki

Toshiaki Hirata

Hidetomo Nakano

A detection method of an illegal access to a computer system includes a step a) of collating user identification information inputted from an input unit in one or more log-in operations with user authentication information registered in the computer system, a step b) of detecting the number of times that the identification information is not coincident with the authentication information in a series of log-in operations within a predetermined term, a step c) of obtaining final log-in information indicating whether the identification information is coincident with the authentication information or not in a final log-in operation, and a step d) of comparing the number of times in respect to the incoincidence and the final log-in information with a predetermined judgment standard to thereby detect the presence of the illegal access.

Detection method of illegal access to computer system

A computer for gathering log data includes a device for normalizing the log data by cutting out values corresponding to pre-defined data items from log data in log files of respective computers on the alert and re-arranging the values of data items defined, and storing the normalized log data therein and a device for gathering the stored normalized log data into a computer having a manager function. Further, when the normalized log data have log data output times corrected on the basis of a time of the computer having the manager function, the normalized log data are stored in order of the corrected log data output times.

Computer for gathering log data

Growing community of inventors

Ebina, Japan

Miki Niimura