| 摘要 |
<p>For a stored data in one file consisting of a plurality of partial data, the rewrite of each partial data by other than the regular creator is prohibited. It is aimed to permit the rewrite but determine whether or not the rewrite has been made for each partial data. Therefore, in storing the data, a first code is generated by converting a password and a predetermined portion of each partial data, for example, the partial data itself or the identification information such as a name, in a predetermined procedure, and stored in correspondence to the stored data, and in reading the stored data, a second code is generated by converting the password and said predetermined portion of the stored data in said predetermined procedure, the comparison is made between the generated second code and said first code stored in correspondence to said stored data, and the rewrite is prohibited if the comparison result is unequal, or the rewrite is determined. <IMAGE></p> |
