| 摘要 |
PROBLEM TO BE SOLVED: To provide an image pickup device capable of eliminating alteration of image data, a server device and a client device. SOLUTION: This image pickup device 100 having identifier information and a first encryption expression in each sold body, performs hash function processing of picked up image data to acquire a hash value, enciphers the acquired hash value by using the first encryption expression and transmits the enciphered hash value to the server device 300 via the client device 200. The server device 300 acquires the original hash value with a prescribed decoding expression, signs the original hash value with a second encryption expression and transmits the signed hash value to the client device 200. The client device 200 compares a hash value acquired from the image data by the client device 200 itself with the original hash value to confirm the existence/non-existence of image data alteration. The original hash value is decoded with a third encryption expression to be verified. |
