Abstract: Electronic data is delivered by using the secret sharing method. A transmission source device divides the electronic data into a predetermined number of partial data by using the secret sharing method and creates an arbitrary number of auxiliary data corresponding to the predetermined number of partial data and having information required for calculating the total number of the auxiliary data and the partial data. These are transmitted to a transmission destination device as a transmission destination of the electronic data via a network. The transmission destination device stores reception data containing a plurality of partial data and the auxiliary data in a storage device and restores the electronic data as the source data before the division from the partial data if the partial data and the auxiliary data has not been tampered.

Abstract: Providing a flush toilet wherein the amount of water supplied to the jet hole and the amount of water supplied to the rim section are independently controlled. The present invention is a flush toilet (1) for supplying flushwater from a flushwater tank, the flush toilet comprising a bowl section (2) at the bottom portion of which is formed a jet hole; a jet flushwater tank (10) for storing flushwater to be supplied from the jet hole; a jet drain valve (14) disposed on the jet flushwater tank; a jet water conduit (18) for conducting flushwater which has passed through the jet drain valve to the jet hole; a rim section (4) disposed on the upper portion of the bowl section; a rim flushwater tank (8) for storing flushwater supplied to the rim section; a rim drain valve (12) disposed on the rim flushwater tank; and a rim water conduit (16) for conducting flushwater passed through the rim drain valve to the rim section.