This paper provides an information theoretical description of biometric systems at the system level. A number of basic models to characterize performance of biometric systems are presented. All models compare performance of an automatic biometric recognition system against performance of an ideal biometric system that knows correct decisions. The correct decision can be visualized as an input t...

Accredited Certification Service which was begun with enforcement of Digital Signature Act on July 1, 1999 for secure electronic transaction with allow the legal effect to digital signature, have supported a secure electronic transaction such as internet banking and on-line stocks. But, because ordinary people can obtain hacking tool easily by fast development of informationalization, security ...

In this paper, we present a method for symbol description based on both spatio-structural and statistical features computed on elementary visual parts, called ‘vocabulary’. This extracted vocabulary is grouped by type (e.g., circle, corner) and serves as a basis for an attributed relational graph where spatial relational descriptors formalise the links between the vertices, formed by these type...

Digital signature is extensively used in many practical applications as numerous cryptographic services have been proposed. In this paper, we will be the first to propose a signature scheme that integrates the following properties. (1) It is a distributed RSA-type multi-signature. (2) It is a blind and weakly undeniable signature. (3) The modulus used by each participant cosigner is identical. ...