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» On the security of an image encryption method
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TCS
2008
13 years 7 months ago
New constructions for provably-secure time-bound hierarchical key assignment schemes
A time-bound hierarchical key assignment scheme is a method to assign time-dependent encryption keys to a set of classes in a partially ordered hierarchy, in such a way that each ...
Alfredo De Santis, Anna Lisa Ferrara, Barbara Masu...
MEDIAFORENSICS
2010
13 years 8 months ago
Efficient estimation of CFA pattern configuration in digital camera images
This paper proposes an efficient method to determine the concrete configuration of the color filter array (CFA) from demosaiced images. This is useful to decrease the degrees of f...
Matthias Kirchner
COMPSAC
2009
IEEE
13 years 5 months ago
Towards Usable Solutions to Graphical Password Hotspot Problem
Click based graphical passwords that use background images suffer from hot-spot problem. Previous graphical password schemes based on recognition of images do not have a sufficient...
Kemal Bicakci, Nart Bedin Atalay, Mustafa Yuceel, ...
IEEEIAS
2007
IEEE
14 years 1 months ago
Protection of Mammograms Using Blind Steganography and Watermarking
As medical image databases are connected together through PACS, those medical images may suffer from security breaches if not protected. If a medical image is illegally obtained o...
Yue Li, Chang-Tsun Li, Chia-Hung Wei
TCS
2002
13 years 7 months ago
Authentication tests and the structure of bundles
Suppose a principal in a cryptographic protocol creates and transmits a message containing a new value v, later receiving v back in a different cryptographic context. It can concl...
Joshua D. Guttman, F. Javier Thayer