| 摘要 |
An image generation apparatus, in generating verification data (digital signature or MAC) necessary for detecting an alteration in image data, generates secret information Ks necessary for the generation of the verification data, utilizing secret information A and secret information B. In this manner, the image generation apparatus makes difficult the leakage and the analysis of the secret information Ks, necessary for generation of the verification data for the image data, whereby the safety and the confidentiality of the secret information Ks can be improved. <IMAGE> |
