In this paper, the authors solve the problem of static portfolio allocation based on historical Value at Risk (VaR) by using Genetic Algorithm (GA). VaR is a predominantly used measure of risk of extreme quantiles in modern finance. For estimation of historical static portfolio VaR, calculation of time series of portfolio returns is required. To ...

Threshold secret sharing schemes are ideal to protect confidential information. In this paper, the authors propose a novel distributed (k, n) threshold secret sharing scheme based on spherical coordinates. As four non-coplanar points can determine a unique sphere, they design transformation algorithms to generate secret as sphere center and mapping algorithms to convert participants to ...