Electronic document storage apparatus, program and electronic document reference apparatus

An electronic document reference apparatus for referring to an electronic document transferred to an archive media from an electronic document storage apparatus for storing an electronic document, comprising:

• an electronic document reference process unit for accessing to the archive media based on for-reference management information provided by the electronic document storage apparatus;
• a for-reference restoration process unit for reading the electronic document out of the archive media into a for-reference electronic document temporary restoration unit;
• and
• a for-reference electronic document temporary restoration unit for storing an electronic document read out of the archive media by the for-reference restoration process unit.

An electronic document storage and reference system, comprising an electronic document storage apparatus comprising an electronic document storage unit for storing a registered electronic document for a specified period of time;

• an electronic document management unit for storing at least a status, a date of registration and an access history of the registered electronic document;
• a key management unit comprising an encryption key creation part for creating a pair of keys made up of encryption keys based on a public key encryption system and a for-management key table for managing the pair of keys being created by the encryption key creation part through assigning key ID as a load key for one of the pair of keys and a read key for the other thereof, and for enciphering by using the load key if there is a request for enciphering;
• a media management table for recording management information of an archive media being used for transferring the electronic document;
• and a transfer process unit for transferring to an archive media an electronic document registered prior to a defined date from among the electronic documents stored in the electronic document storage unit following a request to the key management unit for enciphering the electronic document and for storing management information of an archive media used for transfer including the key ID of a used encryption key in the media management table;
• and an electronic document reference apparatus for restoring the electronic document transferred into the archive media so as to be referred to, further comprising:
• a for-reference information emigration media, wherein
• the electronic document storage apparatus further comprises a for-reference management information extraction unit for extracting information including a key ID of an encryption key used at the time of transferring the electronic document required for referring thereto by searching the electronic document management unit and the media management table, receiving a load key used for enciphering and the pairing read key by requesting the key management unit for enciphering the aforementioned extracted information by specifying the key ID, and storing the enciphered extracted information and the received read key in the for-reference information emigration media when the electronic document storage apparatus receives a request for referring to an electronic document transferred to the archive media on the electronic document reference apparatus, and
• the for-reference information emigration media comprises a for-reference key management unit for managing the read key, wherein
• the electronic document reference apparatus, when receiving a request from the requester for acquiring the electronic document stored in the archive media, reads the electronic document based on information stored in the for-reference management information emigration media, requests the for-reference key management unit for decoding the read electronic document in order to enable the electronic document to be referred to.

An electronic document transfer method by using an electronic document storage apparatus comprising an electronic document storage unit for storing a registered electronic document for a specified period of time, and an electronic document management unit for storing at least a status, a date of registration and an access history of the registered electronic document, comprising:

• registration step for storing an electronic document in the electronic document storage unit in order to register the electronic document, and storing at least a status and the date of registration for the aforementioned electronic document in the electronic document management unit;
• date definition step for defining a date of extracting the electronic document for transfer;
• electronic document extraction step for extracting the electronic document prior to a defined date in the date definition step by referring to the date of registration for storing in the electronic document management unit in the registration step;
• and
• writing step for writing, in an archive media, an electronic document extracted in the electronic document extraction step.

A program, in a program for making a computer operate as an electronic document storage apparatus comprising an electronic document storage unit for storing a registered electronic document for a specified period of time, and an electronic document management unit for storing at least a status, a date of registration and an access history of the registered electronic document, for making the electronic document storage apparatus perform the steps of:

• registration for storing an electronic document in the electronic document storage unit in order to register the electronic document, and storing at least a status and the date of registration for the aforementioned electronic document in the electronic document management unit;
• date definition for defining a date of extracting the electronic document for transfer;
• electronic document extraction for extracting the electronic document prior to a defined date in the date definition step by referring to the date of registration for storing in the electronic document management unit in the registration step;
• and
• writing for writing, in an archive media, an electronic document extracted in the electronic document extraction step.

A program, in a program for making a computer operate as an electronic document reference apparatus for referring to an electronic document transferred to an archive media from an electronic document storage apparatus for storing the electronic document,

• for making the electronic document reference apparatus perform the processes of:
• an electronic document reference process for accessing to the archive media based on for-reference management information provided by the electronic document storage apparatus;
• and
• a for-reference restoration process for reading the electronic document out of the archive media.

An electronic document storage apparatus for storing an electronic document, comprising:

• an electronic document storage unit for storing the registered electronic document for a specified period of time;
• an electronic document management unit for storing at least a status, a date of registration and an access history of the registered electronic document;
• a key management unit, comprising an encryption key creation part for creating a pair of keys made up of encryption keys by a public key encryption system and a for-management key table for managing the pair of keys being created by the encryption key creation part through assigning key ID as a load key for one of the pair of keys and a read key for the other thereof, for enciphering by using the load key if there is a request for enciphering;
• a media management table for recording management information of an archive media being used for transferring the electronic document;
• a transfer process unit for transferring to an archive media an electronic document registered prior to a defined date from among the electronic documents registered in the electronic document storage unit following a request to the key management unit for enciphering the electronic document and storing management information of an archive media used for transfer including the key ID of a used encryption key in the media management table;
• and
• a for-reference management information extraction unit, when receiving a request for referring to an electronic document transferred to the archive media on an apparatus other than the electronic document storage apparatus, for extracting information including a key ID of an encryption key used at the time of transferring the electronic document required for referring thereto by searching the electronic document management unit and the media management table.