1. A non-transitory computer-readable medium having recorded thereon an electronic document management program that causes a computer to manage document information relating to an electronic bond generated from electronic information, the program causing the computer to perform a process comprising: acquiring a plurality of pieces of part identification information respectively identifiably expressing a plurality of parts of document information and a digital signature corresponding to the document information; acquiring a preparation type, a preparer's name and a time and date of preparation of the document information as tracing information of the document information, the preparation type indicating at least one of new issuance of an electronic bond, transfer of a whole electronic bond, issuance of divided electronic bonds, and transfer of one or more than one divided electronic bonds; managing the part identification information and the digital signature acquired in acquiring the plurality of pieces of part identification information and the digital signature and the tracing information acquired in acquiring the preparation type, the preparer's name and the time and date of preparation of the document information, in association with each other, managing, when the preparation type indicates the issuance of divided electronic bonds, the part identification information identifiably expressing amounts of the divided electronic bonds and attached with an electronic signature of the preparer's name of the issuance of the divided electronic bonds; and presenting information relating to the tracing information to the user in response to a request from the user, and causing the acquiring of the plurality of pieces of part identification information and the digital signature and acquiring of the preparation type, the preparer's name and the time and date of preparation of the document information to be executed in response to a directive from the user, wherein the part identification information acquired in acquiring the plurality of pieces of part identification information is acquired as hash information generated by using the parts of the document information, and the hash information is generated by adding the time information to the information of each of the parts of the document information.
1. A non-transitory computer-readable medium having recorded thereon an electronic document management program that causes a computer to manage document information relating to an electronic bond generated from electronic information, the program causing the computer to perform a process comprising: acquiring a plurality of pieces of part identification information respectively identifiably expressing a plurality of parts of document information and a digital signature corresponding to the document information; acquiring a preparation type, a preparer's name and a time and date of preparation of the document information as tracing information of the document information, the preparation type indicating at least one of new issuance of an electronic bond, transfer of a whole electronic bond, issuance of divided electronic bonds, and transfer of one or more than one divided electronic bonds; managing the part identification information and the digital signature acquired in acquiring the plurality of pieces of part identification information and the digital signature and the tracing information acquired in acquiring the preparation type, the preparer's name and the time and date of preparation of the document information, in association with each other, managing, when the preparation type indicates the issuance of divided electronic bonds, the part identification information identifiably expressing amounts of the divided electronic bonds and attached with an electronic signature of the preparer's name of the issuance of the divided electronic bonds; and presenting information relating to the tracing information to the user in response to a request from the user, and causing the acquiring of the plurality of pieces of part identification information and the digital signature and acquiring of the preparation type, the preparer's name and the time and date of preparation of the document information to be executed in response to a directive from the user, wherein the part identification information acquired in acquiring the plurality of pieces of part identification information is acquired as hash information generated by using the parts of the document information, and the hash information is generated by adding the time information to the information of each of the parts of the document information. 3. The non-transitory computer-readable medium according to claim 1 , wherein the part identification information is recorded at an electronic bond management agency.