Refined analysis of RGHWs of code pairs coming from Garcia-Stichtenoth’s second tower
Keywords:
Algebraic geometric codes, Asymptotically good ramp secret sharing schemes, Generalized Hamming weights, Relative generalized Hamming weights, Secret sharing
Abstract
Asymptotically good sequences of ramp secret sharing schemes were given in [5] by using one-point algebraic geometric codes defined from asymptotically good towers of function fields. Their security is given by the relative generalized Hamming weights of the corresponding codes. In this paper we demonstrate how to obtain refined information on the RGHWs when the codimension of the codes is small. For general codimension, we give an improved estimate for the highest RGHW.
