coconut_lib.py 文件源码

def mix_ttp_th_keygen(params, t, n, q):
    """ 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)]) for __ in range(q)]
    # generate shares
    x = [v(i) % o for i in range(1,n+1)]
    y = [[w[j](i) % o for j in range(len(w))] for i in range(1,n+1)]
    # set keys
    sk = list(zip(x, y))
    vk = [(g2, x[i]*g2, [y[i][j]*g2 for j in range(len(y[i]))]) for i in range(len(sk))]
    vvk = (g2, v(0)*g2, [wi(0)*g2 for wi in w])
    return (sk, vk, vvk)