| 摘要 |
PROBLEM TO BE SOLVED: To reduce attack risk to a file server with a high degree of secrecy, and to enhance security to information leakage by eavesdropping of a communication line.SOLUTION: In a method for enhancing security to eavesdropping and attack to file data by a management server which controls exchange of data between a user terminal and a file server with a high degree of secrecy, the management server executes the steps of: determining access permission of the user terminal, and concealing existence of the file server when the user terminal does not have the access permission of the file data to the file server; and generating a unique encryption key to the user terminal when the user terminal has the access permission, establishing an encryption communication path using the encryption key and transmitting and receiving the file data by encryption communication using the encryption communication path, and controls transmission/reception of the data between the file server with high degree of secrecy and the user terminal. |
