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1. 发明申请

WO0251126A3 METHOD AND SYSTEM FOR TRUSTED DIGITAL CAMERA 审中-公开
标题翻译：信号数字摄像机的方法和系统
公开(公告)号：WO0251126A3
公开(公告)日：2002-10-03
申请号：PCT/US0150271
申请日：2001-12-21
申请人： APPLIED SCIENCE FICTION
发明人： HAMILTON JON W
IPC分类号： H04N1/32 , H04N1/44
CPC分类号： H04N1/32144 , H04N1/32101 , H04N1/4426 , H04N1/444 , H04N1/4486 , H04N2201/3205 , H04N2201/3215 , H04N2201/3226 , H04N2201/3233 , H04N2201/3235 , H04N2201/3236 , H04N2201/3266 , H04N2201/3276 , H04N2201/3281
摘要： A digital image (27) is taken by a digital camera (12) and a serial number (22) is associated with the digital image. The digital image is encrypted by the camera using a camera key (20) to form an encrypted image (28). The encrypted image is then communicated to an authentication center (14). The authentication center associates the encrypted image with the serial number identifying the camera and an encrypted camera key (50). At a later time, a digital image is sent by a verifying entity (16) to the authorization center to determine if the digital image has been altered. The authorization center then decrypts the encrypted image, compares the digital image to the decrypted encrypted image and reports the result to the verifying entity. Also, the digital image is encrypted. The digital image is partitioned into at least one partition. A P box is applied to each partition. A first and second S box are applied to each partition. The encrypted image is generated based the P box, the first S box and the second S box. The authentication center decrypts the digital image. The encrypted digital image is decrypted by determining at least one partition based on the encrypted digital image. At least one trajectory associated with the encrypted image is reconstructed. A reverse S2 box, a reverse S1 box and a reverse P box are applied to the partitions. The original digital image is generated based on the first reverse S box, the second reverse S box and the reverse P box.
摘要翻译：数字图像（27）由数字照相机（12）拍摄，序列号（22）与数字图像相关联。使用照相机键（20）通过照相机对数字图像进行加密以形成加密图像（28）。然后将加密的图像传送到认证中心（14）。验证中心将加密的图像与标识相机的序列号和加密的相机密钥相关联（50）。在稍后的时间，数字图像由验证实体（16）发送到授权中心，以确定数字图像是否已被改变。然后，授权中心解密加密的图像，将数字图像与解密的加密图像进行比较，并将结果报告给验证实体。此外，数字图像被加密。数字图像被分割成至少一个分区。一个P盒应用于每个分区。第一个和第二个S盒应用于每个分区。加密图像是基于P框，第一个S框和第二个S框生成的。认证中心解密数字图像。通过基于加密的数字图像确定至少一个分区来解密加密的数字图像。与加密图像相关联的至少一个轨迹被重建。反向S2框，反向S1框和反向P框应用于分区。原始数字图像是基于第一个反向S盒，第二个反向S盒和反向P盒生成的。

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