EGAKA:一种面向LTE-A机器类型通信的高效组认证与密钥协商协议

机器类型通信(Machine Type Communication,MTC)作为物联网的基础,有着广阔的市场和应用前景。LTE-A网络能够为MTC的发展提供有力的支持,第三代合作伙伴项目(3rd Generation Partnership Project,3GPP)已经在3GPP标准Release10中正式定义了MTC。与普通的移动用户设备相比,MTC设备具有数量多、功耗低的特点,这给LTE-A网络的身份认证问题提出了新的挑战。当大量MTC设备同时接入网络时,如果每个设备都进行独立的身份认证过程,则会导致LTE-A网络出现严重的信令拥塞问题。同时,MTC设备由于计算资源有限,不宜做大量的运算。针对MTC网络中设备认证过程的信令拥塞问题,提出了基于聚合代理签名和消息认证码的组认证与密钥协商协议EGAKA。该协议采用聚合代理签名使得LTE-A网络可以同时验证多个MTC设备,并最小化认证过程中的信令开销。采用消息认证码的方法进行密钥协商,有利于降低MTC设备的计算开销。通过着色Petri网(Colored Petri Nets,CPN)的建模和分析,证明该协议能够正确完成认证和密钥协商。另外,通过在性能方面与文中引用的协议比较,证明该协议在信令开销和计算开销方面具有一定优势。

EGAKA:An Efficient Group Authentication and Key Agreement Protocol for MTC in LTE-A Network

Machine type communication (MTC),as the basis of the Internet of things,is a wide open area in market and a great application trend.The MTC networks can be strongly supported by the LTE-A networks,and the 3rd Generation Partnership Project (3GPP) has formally defined the MTC in the standard of Release 10.Compared to the normal mobile user equipment,the MTC devices have some special features,such as the huger quantity and lower power consumption.These features lead to more research challenges for the identity authentication in the LTE-A networks.When a mass of MTC devices are accessed to the LTE-A network simultaneously with a full authentication and key agreement process for each device,the communication signaling would congest the network.Meanwhile,the limited computation resources in MTC devices do not allow too many operations.Aimed at the congestion problems in the authentication processes,an authentication and key agreement protocol based on the aggregated proxy signature and message authentication code was proposed and named as EGAKA.The protocol adopts the aggregated proxy signature to make the LTE-A networks able to authenticate multiple MTC devices simultaneously and minimize the communication consumption.And the adoption of the message authentication code can decrease the computation consumption of the key agreement process.Then,the protocol was modeled and analyzed by the colored Petri nets (CPN),whose results demonstrate that the protocol is safe.Finally,via the performance analysis,the results demonstrate that the communication consumption is better than other protocols of the same kind,and the computation consumption is better than other protocols of the same kind which adopt the asymmetric encryption.