QR-CODE BASED NON-REPUDIATION TRANSACTION VERIFICATION SYSTEM

A QR Code-based Indoor Navigation System Using Augmented Reality

Non-Repudiation in an Agent-Based Electronic Commerce System

Abecos is an agent-based e-commerce system under development at the Nanyang Technological University. A key factor in making this system usable in practice is strict security controls. One aspect of security is the provision of non-repudiation services. As protocols for non-repudiation have focused on -message non-repudiation, its adaptation to a ord non-repudiation in a communication session f...

Formal Verification of a Timed Non-Repudiation Protocol

Fairness of non-repudiation is naturally expressed as a liveness specification. We formalize this idea by using the process algebra CSP to analyze the well-known Zhou-Gollmann protocol. We here model and verify a variant of the ZG protocol that includes a deadline (timestamp) for completion of the protocol, after which an agent can no longer initiate the recovery protocol with the TTP to get ho...

QR Code Steganography

QR codes, also known as matrix codes, are basically two dimensional barcodes embedded with data that can be decoded quickly for information. In this work, we present a novel use of QR codes. We show that QR codes can be used for covert communication using steganography. We also show in complete detail how to build QR code symbols with a hidden payload and how to extract this hidden information ...

Artistic QR Code Embellishment

A QR code is a two-dimensional barcode that encodes information. A standard QR code contains only regular black and white squares, and thus is unattractive. This paper proposes a novel framework for embellishing a standard QR code, to make it both attractive and recognizable by any human while maintaining its scanability. The proposed method is inspired by artistic methods. A QR code is typical...