36 search results - page 5 / 8 » Halftone visual cryptography |
JCP
2008
13 years 8 months ago
2008
Multi-pixel encoding is an emerging method in visual cryptography for that it can encode more than one pixel for each encoding run. Nevertheless, in fact its encoding efficiency is...
DCC
2005
IEEE
14 years 8 months ago
2005
IEEE
A recent publication introduced a Visual Crypto (VC) system, based on the polarisation of light. This VC system has good resolution, contrast and colour properties. Mathematically,...
IWDW
2004
Springer
14 years 1 months ago
2004
Springer
Abstract. In image authentication watermarking, hidden data is inserted into an image to detect any accidental or malicious image alteration. In the literature, quite a small numbe...
SIBGRAPI
2007
IEEE
14 years 2 months ago
2007
IEEE
This paper presents a data hiding technique for printed bicolor documents. It inserts tiny dots, hardly noticeable at normal reading distance, to embed the message. For message ex...
JCP
2007
13 years 8 months ago
2007
— Integrity of digital documents is a very important issue if they are to be legally binding. Common solutions, like digital signatures or message authentication codes, are based...