about electronic signatures there are more or less some writings concerning their legal aspect. but in those writings there has been a little attention to credibility and evidential value of the electronic signatures. some questions and ambiguities despite being set before has not been answered at all or answered unsatisfactorily. meanwhile, some authors have made mistakes and some have set tri...

nowadays, technological development and the appearance of new informational and communicational devices have been lead to new methods for communication and generating and storing of data. the growth of using of these methods in commercial and daily connection has caused a new version of evidence called electronic evidence. although the nature of electronic and paper evidence are different, the ...

Since the “explosion” of the number of on-line transactions, many IT researchers have concentrated their efforts to offer solutions to the security demanded by operations involving financial data. This paper proposes a novel system which employs biometry to secure electronic transactions by using the dynamic signature as the single individual characteristic to be verified before the processing ...

A convertible limited (multi-) verifier signature (CL(M)VS) provides controlled verifiability and preserves the privacy of the signer. Furthermore, limited verifier(s) can designate the signature to a third party or convert it into a publicly verifiable signature upon necessity. In this proposal, we first present a generic construction of convertible limited verifier signature (CLVS) into which...

Online Internet applications are used widely all over the world. Especially the secured applications like banking and financial applications the basic authentication is password and one time password verification. The new system is facilitated with signature based authentication and graphical pattern authentication based on Multimodal Verification System. The new system uses contourlet based tr...

A new attack against a novel certificateless aggregate signature scheme with constant pairing computations is presented. To enhance security, a new certificateless signature scheme is proposed first. Then a new certificateless aggregate signature scheme with constant pairing computations based on the new certificateless signature scheme is presented. Security analysis shows that the proposed ce...