coconut_lib.py 文件源码

def ttp_th_keygen(params, t, n):
    """ generate keys for threshold signature """
    (G, o, g1, hs, g2, e) = params
    # generate polynomials
    v = np.poly1d([o.random() for _ in range(0,t)])
    w = np.poly1d([o.random() for _ in range(0,t)])
    # generate shares
    x = [v(i) % o for i in range(1,n+1)]
    y = [w(i) % o for i in range(1,n+1)]
    # set keys
    sk = list(zip(x, y))
    vk = [(g2, xi*g2, yi*g2) for (xi, yi) in zip(x, y)]
    vvk = (g2, v(0)*g2, w(0)*g2)
    return (sk, vk, vvk)