28 search results - page 6 / 6 » F5-A Steganographic Algorithm |
MMSEC
2006
ACM
14 years 1 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
14 years 20 days 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
14 years 9 days 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...