JP2008197746A5

JP2008197746A5 -

Info

Publication number: JP2008197746A5
Application number: JP2007029681A
Authority: JP
Filing date: 2007-02-08
Publication date: 2010-05-20
Anticipated expiration: 2027-02-08

Claims

A file sharing system for sharing files between a plurality of computers via a server,
A specification means for specifying a file to be shared;
Program generation means for generating an access program necessary for accessing the specified file;
Transfer means for transferring the generated access program to a receiving computer that will share the file;
A means realized by starting the access program in the receiving computer, an acquisition means for acquiring unique identification information given to the receiving computer, and an access request with the acquired identification information as a server An access request transmitting means for transmitting to the file receiving means for receiving the file transmitted from the server when the access request is a legitimate access request;
A means provided in the server, a password generating means for generating a password for authentication from the identification information transmitted from the receiving computer, and a holding for holding a password for accessing the file through the access program in advance Means, authentication means for executing an authentication process according to whether or not the generated password matches the password held in the holding means, and the generated password and the holding means If the received password does not match, the access from the receiving computer to the file is denied, and if the generated password matches the password held in the holding means, the file is accessed from the receiving computer. Including permission means for permitting File sharing system.

Determination means for determining whether or not the access request by the access program is an initial access request to the file;
When the determination unit determines that the access request is an initial access request, the holding unit uses the password generated by the password generation unit as a password for accessing the file through the access program. Hold
The file sharing system according to claim 1.

The identification information includes at least one of a MAC address of the receiving computer, a domain name, a build number of an OS running on the receiving computer, a license number of the OS, and a user ID of a user logged on to the receiving computer. file sharing system according to claim 1 or 2, characterized in that it comprises one.

When the password is generated, the file sharing system according to any one of claims 1 to 3, further comprising an erasing means for erasing the identification information received from the receiving computer.

It said transfer means, the file sharing system according to any one of claims 1 to 4, characterized in that it comprises an electronic mail transmission means for transmitting to attach the access program in an email.

The program generation means includes
Issuing means for issuing an access program ID for distinguishing the access program from other access programs, and a management table for managing the access program ID and the file in association with each other,
The access request transmission means extracts the access program ID from the access program and transmits it to the server together with the access request.
The holding unit specifies the file corresponding to the access program ID by searching the management table based on the access program ID received together with the access request, and includes the password together with the file ID of the specified file. The file sharing system according to any one of claims 1 to 5 , wherein the file sharing system is held.

The access request transmission means includes
A flag for determining whether or not it is the first access to the file included in the access program is transmitted together with the access request,
The server
Instructing means for instructing the receiving computer executing the access program to rewrite the flag when the determining means determines that the access request is the first access request based on the flag received together with the access request. Further including
The receiving computer is
When instructed to rewrite the flag, the file sharing system according to any one of claims 2 to 6, characterized by comprising a rewriting means for rewriting to represent not the first access the contents of the flag .

A file sharing method for sharing a file between a plurality of computers via a server,
A designation process in which the first computer designates a file to be shared;
A program generation step in which the server generates an access program necessary for the second computer to access the designated file;
A transfer step in which the first computer transfers the generated access program to the second computer that will share the file;
A starting step in which the second computer starts the access program;
An acquisition step in which the second computer acquires unique identification information given to the second computer;
An access request transmitting step in which the second computer transmits an access request with the acquired identification information to the server;
The server generates a password for authentication from the identification information transmitted from the second computer;
A holding step for holding a password when the server accesses the file through the access program in advance ;
An authentication step in which the server executes an authentication process according to whether the generated password matches the password held by the holding step;
If the generated password and the password held in the holding step do not match, the server rejects access from the second computer to the file, and is held by the generated password and the holding step. And a permission step of permitting access to the file from the second computer if the password matches.

A server for sharing files among multiple computers,
Program generation means for generating an access program necessary for accessing a file to be shared;
Transfer means for transferring the generated access program to a receiving computer that will share the file via a first computer that specifies the file to be shared;
When the access program is executed in the receiving computer, an access request receiving means for receiving an access request with unique identification information given to the receiving computer;
Password generating means for generating a password for authentication from the identification information transmitted from the receiving computer;
Holding means for holding a password for accessing the file through the access program in advance ;
An authentication unit that performs an authentication process according to whether the generated password matches the password held in the holding unit;
If the generated password and the password held in the holding unit do not match, the access from the receiving computer to the file is denied, and the generated password and the password held in the holding unit are And a permitting means for permitting access from the receiving computer to the file if they match.

A computer program executed on a server for sharing a file between a plurality of computers,
Program generation means for generating an access program necessary for accessing a file to be shared;
Transfer means for transferring the generated access program to a receiving computer that will share the file via a first computer that specifies the file to be shared;
When the access program is executed in the receiving computer, an access request receiving means for receiving an access request with unique identification information given to the receiving computer;
Password generating means for generating a password for authentication from the identification information transmitted from the receiving computer;
Holding means for holding a password for accessing the file through the access program in advance ;
An authentication unit that performs an authentication process according to whether the generated password matches the password held in the holding unit;
If the generated password and the password held in the holding unit do not match, the access from the receiving computer to the file is denied, and the generated password and the password held in the holding unit are A computer program that causes the server to function as a permitting means for permitting access from the receiving computer to the file if the two match.