A fair electronic cash system is a system that allows customers to make payments anonymously. Furthermore the trusted third party can revoke the anonymity when the customers did illegal transactions. In this paper, a new fair electronic cash system based on group signature scheme by using elliptic curve cryptography is proposed, which satisfies properties of secure group signature scheme (corre...

Several new group signature schemes have been proposed in recent years. In addition, several applications for group signatures (including electronic cash) have been suggested. A new cash scheme based on a recent group signature by Ateniese, Camenisch, Joye and Tsudik is presented. Its construction uses a general framework suitable for a number of group signature schemes. We also identify the ch...

This article provides a contribution to innovation research in the field of electronic signatures, particularly to the future development of the aspects of diffusion throughout the IT-technology of the "Public Key Infrastructure" (PKI). In the modern Internet economy, PKI-technology is generally seen as the basis for obligatory authentication and safe communication. Nowadays, large scale enterp...

the problem of automatic signature recognition has received little attention incomparison with the problem of signature verification, despite its potentialapplications for many business processes and can be used effectively in paperlessoffice projects. this paper presents model-based off-line signature recognition withrotation invariant features. non-linear rotation of signature patterns is one...

We analyse the legal requirements that digital signature schemes have to fulfil to achieve the Statutory Trust granted by the EU electronic signature laws (“legally equivalent to hand-written signatures”). Legally, we found that the possibility to detect subsequent changes is important for the Statutory Trust. However, detectability was neither adequately nor precisely enough defined in the tec...

789 www.cmj.hr Many African countries are liberal in accepting medical degrees and specialist qualifications acquired abroad. This in part stems from the lack of training programs on the African continent that can supply the required or near the required numbers of doctors to serve the populations. As the majority of African states are English-speaking, academic and professional qualifications ...

A US law, the electronic signatures (E-Sign) in Global and National Commerce Act (signed by then President Clinton on 30 June 2000 with an effective date of 1 October 2000), grants electronic signatures legal validity equivalent to traditional handwritten counterparts. The intention of this law is to cut costs while providing more stringent security. In the emerging ecommerce arena, electronic ...

Identity-based cryptography has attracted attention in the cryptographic research community in recent years. Despite the importance of cryptographic schemes for applications in business and law, the legal implications of identity-based cryptography have not yet been discussed. We investigate how identity-based signatures fit into the legal framework. We focus on the European Signature Directive...