Self-Proxy Mobile Signature: A New Client-Based Mobile Signature Model

The application of a fast and secure mobile signature model is an essential issue for the development of the mobile electronic commerce since digital signatures can provide authentication, data integrity, and non-repudiation. There are several technologies and models with the aim of implementing signature processes for mobile devices. In this paper, we categorize them into client-based and server-based models. We will comment on the most important properties of each solution and analyze the advantages and disadvantages, with a special focus on the private key security, performance of the signature generation process, and application of digital certificates. Furthermore, we present, analyze, and develop a new client-based mobile signature model, based on the concept of proxy certificates, which guarantees the security of user's private key as well as improving the speed of signature generation process. This model can be extended in order to use it for mobile partial identification, and also, to develop applications like secure mobile auctions that need several signature generations in a short period of time.