The paper outlines the importance of elliptic curve cryptosystem firstly, then analyses the using of traditional digital signature based on the elliptic curve. Due to the mod-inversion operation influencing signature and verification, thus two improvements to this point has been proposed. According to its analysis of performance, improving efficiency and ensuring security.

Computation of multiplicative inverses in finite fields GF (p) and GF (2) is the most time consuming operation in elliptic curve cryptography especially when affine coordinates are used. Since the existing algorithms based on extended Euclidean algorithm do not permit a fast software implementation, projective coordinates, which eliminate almost all of the inversion operations from the curve ar...

In this paper we analyze the use of affine coordinates for pairing computation. We observe that in many practical settings, e. g. when implementing optimal ate pairings in high security levels, affine coordinates are faster than using the best currently known formulas for projective coordinates. This observation relies on two known techniques for speeding up field inversions which we analyze in...

OBJECTIVES To investigate the value of T-wave inversion after premature ventricular complexes (PVCs) for the prediction of hypertensive patients with a likelihood of ischemic heart disease (IHD). PATIENTS AND METHODS Ambulatory 24-hour ECG, ambulatory 24-hour blood pressure (BP) recording, echocardiography, treadmill exercise ECG test and thallium-201 scintigraphy were performed for 210 hyper...

iran is situated in one of the world's seismic regions and the possibility of destructive earthquakes in most regions of the country has given great significance to recognition of iranian seismic nature from a seismic and seismotectonic standpoint. study of the crust and upper mantle velocity structure in the iranian plateau provides better understanding of its evolution and tectonic histo...

This paper describes synthesizable VDHL implementation of elliptic curve Point Multiplication. Elliptic curves used for ECC are defined over mathematical structures called Galois fields. Based on the theory of ECC, this paper has carried out Modular addition/subtraction, EC Point doubling/addition, Modular multiplicative inversion, EC point multiplier, projective to affine coordinates conversio...

We have developed a method for three-dimensional simultaneous velocity and density inversion using traveltimes of local earthquakes and gravity data. The purpose of this method is to constrain the velocity inversion and increase the spatial resolution of shallow velocity structures by introducing additional gravity data. The gravity data contributes to the Pand S-wave velocity models by imposin...