发明名称 |
KEY SYNCHRONIZATION IN AN IMAGE CRYPTOGRAPHIC SYSTEM |
摘要 |
A system for visual cryptography comprises a server (1) for encrypting a series of images using a set of keys, a terminal (2) for displaying the encrypted images, a transmission medium (4) for transmitting the encrypting images from the server to the terminal (2), and a decryption device (3) for decrypting the encrypted image displayed on the terminal. Subsequent images are encrypted using different keys chosen from the set of keys. These encrypted images and a feedback mechanism are provided to test whether the server and the terminal utilize the same keys at a particular instant. Preferably at least two encrypted images are provided simultaneously as parts of a larger image, thus allowing a user of the decryption device to indicate which key decrypts the image correctly.
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申请公布号 |
KR20050074646(A) |
申请公布日期 |
2005.07.18 |
申请号 |
KR20057009686 |
申请日期 |
2005.05.27 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
SCHRIJEN GEERT J.;TUYLS PIM T. |
分类号 |
G06F1/00;G06F21/00;G06F21/60;G09C5/00;H04L9/12;H04N1/44;(IPC1-7):H04N5/913;H04N7/167 |
主分类号 |
G06F1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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