生成安全的用于加密的随机数

            请使用RandomNumberGenerator类，使用该类不会让人猜出你的随机数生成规律，也可用其派生类RNGCryptoServiceProvider类来生成随机数，例如:
            byte[] randomBytes = new byte[4];

            for (int i = 0; i < 100; i++)
            {
                RandomNumberGenerator rand;

                rand = RandomNumberGenerator.Create();
                rand.GetBytes(randomBytes);
                int randomInt = BitConverter.ToInt32(randomBytes, 0)；

                Response.Write(randomInt .ToString("N") + "<br/>");
            }

            如果要创建安全的GUID请使用以下方法：

            byte[] randomBytes = new byte[16];

            for (int i = 0; i < 100; i++)
            {
                RandomNumberGenerator rand;

                rand = RandomNumberGenerator.Create();
                rand.GetBytes(randomBytes)；

                Guid randomGuid = new Guid(randomBytes);

                Response.Write(randomGuid.ToString("N") + "<br/>");
            }

            但以上介绍的两个类比Random慢了至少8倍。

转载于:https://www.cnblogs.com/bluersw/archive/2009/08/06/1540765.html