We introduce the notion of associative one-way functions and prove that they exist if and only if P 6= NP. As evidence of their utility, we present two novel protocols that apply ...
The characterization of a video segment by a digital signature is a fundamental task in video processing. It is necessary for video indexing and retrieval, copyright protection and...
Costas I. Cotsaces, Nikos Nikolaidis, Ioannis Pita...
Digital watermarking is a technology to hide information in digital media. We extend the digital watermarking technique Phasemark™, originally developed solely for image authent...
Various schemes have been proposed to achieve strong authenticationof streamed data in a lossy network by means of “light” digital signatures. Such techniques perform a strong...
In the analysis of security protocols, the knowledge of attackers is often described in terms of message deducibility and indistinguishability relations. In this paper, we pursue ...