A key distribution protocol is a set of rules by which two users can establish a shared common key between them and then use the key in future secure communications. We analyze a key distribution protocol presented by Leighton and Micali at the CRYPTO'93 conference, which is based on tamper-proof hardware, and show that the protocol fails in that a common key shared between two users can always...

This paper describes the operation of a demonstrator of the authentication/tamper detection system proposed in [1] for surveillance systems. The demonstrator consists of three parts. The first captures images, calculates and embeds authentication data, then compresses and records the images to hard disk. The second provides means to tamper a selection of recorded images, and the third checks th...

In supply chains, it is important to preserve the integrity of a product as it is travels through the channel of distribution and is delivered to the final consumer. In absence of a secure mechanism, adversaries can manipulate supply chains to tamper with or introduce fake components. To mitigate this threat, we propose a novel architecture for preserving the integrity of the supply chain infor...

The paper proposes a method for tamper proofing digital images using the technique of digital watermarking. Many a times the published images are subject to tampering to an extent that the facts conveyed in the original image are distorted. The mechanism presented here describes a method for detecting the regions in image that were subject to illegal modifications. The method also can detect th...