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Key updating method and system for sensor node

A sensor node and key update technology, applied in transmission systems, digital transmission systems, and key distribution, can solve problems such as low efficiency, high key update overhead, and long time consumption.

Active Publication Date: 2013-05-01
ZTE CORP
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  • Abstract
  • Description
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Problems solved by technology

[0005] The object of the present invention is to provide a sensor node key update method and system to solve the problems of high overhead, time-consuming and low efficiency of key update in the prior art

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  • Key updating method and system for sensor node
  • Key updating method and system for sensor node
  • Key updating method and system for sensor node

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Embodiment Construction

[0062] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0063] The invention is based on the elliptic curve cryptosystem, the security of the elliptic curve is based on the intractability of the discrete logarithm problem of the elliptic curve, and the complexity of the algorithm is exponential, so that the security of the wireless sensor network is greatly improved.

[0064] The key distribution of the traditional public key cryptosystem is generally pre-stored information, which makes it necessary to update all the keys stored in the sensor nodes during the key update phase, which increases the communicatio...

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Abstract

The invention discloses a key updating method and system for a sensor node. The method comprises the following steps of: sending a key updating request to a management platform by the sensor node; authenticating the identification of the sensor node by the management platform, randomly generating an Ni-bit updating key for the sensor node after the authentication passes, encrypting the updating key, and sending ciphertext information obtained by encryption to the sensor node; and deciphering the ciphertext information by the sensor node to obtain the updating key, and updating an old key by using the updating key. According to the key updating method disclosed by the invention, the updating time is shortened, the node energy consumption and the communication overhead are reduced, and the network operation efficiency is improved.

Description

technical field [0001] The invention relates to a wireless sensor network in the field of communication, in particular to a method and system for updating a key of a sensor node. Background technique [0002] With the continuous development of public key cryptography and the continuous improvement of hardware processing capabilities, public key cryptography is gradually being applied to wireless sensor networks. A wireless sensor network is based on a management platform with powerful computing and storage capabilities, and is usually formed by a large number of sensor nodes randomly distributed on a large scale. Most of these sensor nodes have only low configuration and very limited processing power. Sensor nodes are usually powered by batteries, which have the characteristics of low power, limited data processing capability, and small wireless communication range. At the same time, most sensor nodes are located in harsh environments, uninhabited areas or enemy positions,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W12/04H04W12/06H04W84/18H04W12/041H04W12/0433
CPCH04W12/04H04L9/08Y02B60/50H04W84/18H04L9/0891H04L2209/805Y02D30/70H04W12/0433
Inventor 于长健王景成张震玮胡霆何军隆笑赵广磊
Owner ZTE CORP
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