Document management system, information processing device and method, and computer program

An information processing device, which executes a decoding process of an encrypted document, the information processing device comprising:

• a code analyzing section that reads code data from a code-recorded document, in which code data including an decryption key and an ID serving as index data of the encrypted document is recorded, and that executes an analysis process;
• an decryption key acquiring section that acquires the decryption key included in data analyzed by the code analyzing section;
• and
• a decryption processing section that executes a decoding process of an encrypted document corresponding to an ID analyzed by the code analyzing section using the decryption key acquired by the decryption key acquiring section.

A document management system comprising:

• a document generating device that generates a document and performs encryption thereof;
• an information shared server that stores an encrypted document generated by the document generating device;
• and
• a document utilizing device that acquires and decodes the encrypted document stored in the information shared server,
• wherein the document generating device has:
• an encryption processing section that executes an encryption process of the document to generate the encrypted document using an encryption key;
• a document creating section that generates a code-recorded document, in which code data including an decryption key for the decryption process of the encrypted document and an ID serving as index data of the encrypted document is recorded;
• and
• a communication section that transmits the encrypted document and the ID to the information shared server,
• the information shared server has:
• a database, from which the encrypted document can be acquired with the ID as an index, and
• the document utilizing device has:
• a code analyzing section that analyzes code data recorded in the code-recorded document to acquire the decryption key and the ID;
• and
• a decryption processing section that decodes the encrypted document acquired from the information shared server with the ID as an index.

An information processing method, which generates a document and performs encryption thereof, the information processing method comprising:

• generating an encrypted document through a document encryption processing using an encryption key;
• generating code data including a decryption key and an ID serving as index data of the encrypted document;
• generating a code-recorded document, in which code data is recorded;
• and
• transmitting the encrypted document and the ID to a server.

An information processing method, which executes a decoding process of an encrypted document, the information processing method comprising:

• reading code data from a code-recorded document, in which code data including a decryption key and an ID serving as index data of an encrypted document is recorded, and executing an analysis processing;
• acquiring the decryption key included in data analyzed in the analysis processing;
• and
• executing a decrypting process of an encrypted document corresponding to an ID analyzed in the analysis processing by using the decryption key acquired in the acquiring the decryption key.

A storage medium readable by a computer, the storage medium storing a program of instructions executable by the computer to perform a function for performing a generation processing and an encryption process of a document, the function comprising the steps of:

• generating an encrypted document through a document encryption processing using an encryption key;
• generating code data including a decryption key and an ID serving as index data of the encrypted document;
• generating a code-recorded document, in which code data is recorded;
• and
• transmitting the encrypted document and the ID to a server.

A storage medium readable by a computer, the storage medium storing a program of instructions executable by the computer to perform a function for performing a decoding process of an encrypted document, the function comprising the steps of:

• reading code data from a code-recorded document, in which code data including an decryption key and an ID serving as index data of an encrypted document is recorded, and executing an analysis processing;
• acquiring the decryption key included in data analyzed in the analysis processing;
• and
• executing a decoding process of an encrypted document corresponding to an ID analyzed in the analysis processing by using the decryption key acquired in the acquiring the encryption key.