Access privilege transferring method

An information managing method for safely managing secret information between clients, and between clients and servers, over an object space in which at least one server for providing objects and at least one client requiring the objects are connected to one another by a network, comprising:

• encrypting secret information by using an encryption key, thereby generating protected secret information by at least a first of a plurality of clients;
• transmitting the protected secret information from the at least the first of the plurality of clients to at least a second of the plurality of clients;
• storing, by the at least the second of the plurality of clients, the received protected secret information in a secondary memory device;
• transmitting a decryption key for decrypting the information encrypted by the encryption key from the at least the first of the plurality of clients to the at least the second of the plurality of clients;
• and
• decrypting, by the at least the second of the plurality of clients, the protected secret information by using the decryption key, thereby obtaining the secret information.

An information managing method for safely managing secret information between clients, and between clients and servers, over an object space in which at least one server for providing objects and at least one client requiring the objects are connected to one another by a network, comprising:

• transmitting secret information from at least a first of a plurality of clients to at least a second of a plurality of clients;
• holding, by the at least the second of the plurality of clients, an encryption key for encrypting information and a decryption key for decrypting the encrypted information encrypted by the encryption key;
• transmitting the decryption key from the at least the second of the plurality of clients to the at least the first of the plurality of clients;
• storing, by the at least the second of the plurality of clients, protected secret information obtained by encrypting the secret information with the encryption key in a secondary memory device;
• and
• decrypting the protected secret information by using the decryption key, thereby obtaining the secret information by the at least the second of the plurality of clients.

An information managing method for safely managing secret information between clients, and between clients and servers, over an object space in which at least one server for providing objects and at least one client requiring the objects are connected to one another by a network, comprising:

• transmitting secret information from at least a first of a plurality of clients to at least a second of the plurality of clients;
• transmitting, by the at least the second of the plurality of clients, a challenge character string to the at least the first of the plurality of clients;
• applying a predetermined calculating operation to the challenge character string and the secret information, thereby generating an encryption key by the at least the first of the plurality of clients;
• transmitting the encryption key from the at least the first of the plurality of clients to the at least the second of the plurality of clients;
• and
• storing, by the at least the second of the plurality of clients, protected secret information obtained by encrypting the secret information by using the encryption key in a secondary memory device.