28 search results - page 6 / 6 » F5-A Steganographic Algorithm |
MMSEC
2006
ACM
13 years 11 months ago
2006
ACM
In this paper, we study the trade-off in steganography between the number of embedding changes and their amplitude. We assume that each element of the cover image is assigned a sc...
EUROCRYPT
2003
Springer
13 years 11 months ago
2003
Springer
We introduce captcha, an automated test that humans can pass, but current computer programs can’t pass: any program that has high success over a captcha can be used to solve an u...
STOC
2010
ACM
13 years 10 months ago
2010
ACM
In STOC’05, von Ahn, Hopper and Langford introduced the notion of covert computation. In covert computation, a party runs a secure computation protocol over a covert (or stegano...