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Key agreement method and system for PON system

A key negotiation, one-party technology, applied in the field of network communication, can solve the problems of inability to decrypt data and poor security, and achieve the effect of improving security, improving reliability, and small process changes

Inactive Publication Date: 2011-10-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this scheme, the OLT uses the key corresponding to each ONU to encrypt the data sent to different ONUs, so that any ONU in the system can only decrypt the data sent to itself, but cannot decrypt the data sent to other ONUs
[0005] However, the existing technology directly transmits the plaintext key through the network, making the key easy to be obtained by others, so its security is poor

Method used

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  • Key agreement method and system for PON system
  • Key agreement method and system for PON system
  • Key agreement method and system for PON system

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Experimental program
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Embodiment Construction

[0030] like figure 2 , image 3 As shown, the specific flow of the key agreement method of the present invention is introduced as follows: S1, OLT randomly generates a random number x, and obtains system parameters a, b;

[0031] Described random number is a large integer, a and b are large prime numbers, and a is a primitive element of modulus b, and the method for obtaining system parameters in the present invention can be any of the following methods:

[0032] Solidified in OLT and ONU, generated through negotiation between the two parties before each communication, one party is temporarily assigned to the other party before each communication, or both parties change and generate system parameters according to a certain rule before each communication.

[0033] S2. The OLT generates the transfer number X according to the key agreement function;

[0034] The key agreement function in the present invention can be negotiated and determined by both parties before communicatio...

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PUM

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Abstract

The method includes steps: optical line terminal OLT or optical network unit ONU sends requesting message for updating encryption key; based on random number and system parameters, OLT or ONU generates encryption keys respectively; OLT or ONU sends message for requesting to start using encryption key to complete negotiation about encryption key. The system includes OLT and ONU. The disclosed system and method increases security of encryption key exchange process of passive optical network system greatly.

Description

technical field [0001] The present invention relates to the technical field of network communication, in particular to a method and system for key negotiation in a PON (Passive Optical Network, Passive Optical Network) system. Background technique [0002] At present, in the field of access network, in addition to the full development of DSL (Digital Subscriber Loop) technology, optical access technology is also booming, especially PON technology has attracted the attention of the industry. PON technology is a point-to-multipoint optical access technology. Compared with point-to-point technology, a single optical fiber at the PON system central office can be divided into dozens or even more optical fibers to connect with users, which greatly reduces the network construction cost. cost. [0003] like figure 1 As shown, the PON system is composed of OLT (Optical Line Termination, Optical Line Termination), ONU / ONT (Optical Network Unit, Optical Network Unit / Optical Network T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/08H04L9/16H04L29/06
Inventor 刘利锋郑志彬王飞
Owner HUAWEI TECH CO LTD