AUTHENTICITY ASSURANCE SYSTEM FOR SPREADSHEET DATA

摘要

A method is provided for applying a redactable signature method capable of verification even after deletion (blacking-out) of a part of a signed electronic document to spreadsheet data. By giving an ID for a redactable signature to a cell to be processed in the processed data by a spreadsheet program, which part in the file corresponds to the cell to be processed can be easily determined when the data is outputted as a file.