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Body area network main key generation method

A technology of body area network and master key, which is applied to the public key and key distribution of secure communication to achieve the effect of improving security

Active Publication Date: 2015-08-12
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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  • Description
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AI Technical Summary

Problems solved by technology

[0004] In order to solve the above technical problems, the embodiment of the present invention provides a body area network master key generation method to solve the security problem of information transmission in the master key negotiation protocol in the prior art

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Embodiment Construction

[0032] As mentioned in the background technology section, the security of information transmission in the Diffie-Hellman key exchange protocol based on elliptic curves in the prior art is poor.

[0033] The inventors found that in the body area network protocol, the premise of the Diffie-Hellman key exchange protocol based on the elliptic curve is a public elliptic curve E and its upper point G. Then, select a private key SK and calculate the public key PK=SK×G, where × is a unique multiplication operation on the elliptic curve. In this multiplication operation, PK can be obtained with SK and G, but PK and G cannot Calculate the SK.

[0034] Specifically, the negotiation steps in the elliptic curve-based Diffie-Hellman key exchange protocol include:

[0035] Step 01: Negotiating parties A and B each select a private key SK A and SK B ;

[0036] Step 02: Negotiating party A calculates its public key PK A =SK A ×G, sent to negotiating party B; negotiating party B calculate...

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Abstract

An embodiment of the invention discloses a body area network main key generation method. A body area network includes a center node and at least one goal node, the method includes the following steps: the center node receives a first public key of the goal node, and generates a first key variable value based on the first public key and a second public key of the goal node and a first private key and a second private key of the center node, so as to obtain a main key; and the target node receives a first public key of the center node, and generates a second key variable value based on a first public key and a second public of the center node and a second private key and a second private key of the goal node, so as to obtain a main key. The first key variable value and the second key variable value are the same. The body area network key generation method provided by the embodiment solves the problem that a Diffie-Hellman key exchange protocol based on an elliptic curve cannot resist an intermediary, thereby improving security of information transmission.

Description

technical field [0001] The invention relates to the technical field of key generation, in particular to a body area network master key generation method. Background technique [0002] The body area network protocol (IEEE 802.15.6) specifies the network structure and key agreement mechanism of the body area network. Wherein, the network structure of the body area network adopts a star structure, which is composed of a central node hub and a plurality of target nodes nodes, and each target node node can communicate with the central node hub, but different target node nodes cannot communicate with each other. communication. It should be noted that before each target node communicates with the central node hub, the target node needs to initiate a master key negotiation with the central node. After the negotiation is completed, a temporary key is generated according to the master key. Session key for security operations such as data encryption / authentication. [0003] The mast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04L9/30
Inventor 陈锐陈岚李莹
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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