| 摘要 |
<P>PROBLEM TO BE SOLVED: To record a receipt transfer history which is hardly altered or forged concerning electronic information or objects. <P>SOLUTION: This history recording system for recording a history each time electronic information is sequentially receipt-transferred while accompanied with digital signatures by a plurality of receipt transferers is provided with a plurality of terminals for receipt transferers connected to each other and a database in which history data are stored. Each of the terminals for receipt transferers is provided with a position data generating part, a digital signature generating part which reads the previous history data associated with the digital signatures received from the previous terminal for receipt transferer from the database, and newly generates digital signatures based on the previous history data and position data and a history data generating part which generates the hash value of the previous history data, and newly generates the history data based on the hash value and the newly generated digital signatures, and makes the database store them. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
