Thus , we need to reconstruct the traditional tcp / ip protocol to make it more suitable for resource limited devices . but the open network environment can not ensure the security of the connective system . if the security problem can not be solved better in the lightweight tcp / ip protocol , the security of the connective system is very easy to be threatened 为此,我们需要对传统的tcp / ip协议进行改造,使其适合在资源有限的设备中使用,但是开放的网络环境并不保证所接入系统的安全性,如果在轻量级tcp / ip协议中不能很好地解决安全问题,那么所接入系统的安全性很容易受到威胁,所以轻量级tcp / ip协议的安全性是一个必须要解决的问题。