Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Physical layer encryption/decryption method based on ONU (optical network unit) end time-varying keys in OFDM-PON (orthogonal frequency division multiplexing-passive optical network)

An OFDM-PON, physical layer technology, applied in the field of physical layer encryption/decryption based on the time-varying secret key at the ONU end in OFDM-PON, can solve problems such as the limitation of encryption performance, improve security, reduce complexity and complexity degree-reducing effect

Inactive Publication Date: 2014-05-07
SHANGHAI JIAO TONG UNIV
View PDF3 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this technology, as long as the user with the secret key can obtain the downlink data, its encryption performance is greatly limited.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Physical layer encryption/decryption method based on ONU (optical network unit) end time-varying keys in OFDM-PON (orthogonal frequency division multiplexing-passive optical network)
  • Physical layer encryption/decryption method based on ONU (optical network unit) end time-varying keys in OFDM-PON (orthogonal frequency division multiplexing-passive optical network)
  • Physical layer encryption/decryption method based on ONU (optical network unit) end time-varying keys in OFDM-PON (orthogonal frequency division multiplexing-passive optical network)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 , Figure 8 with Image 6As shown, this embodiment takes two units of ONU1 and ONU2 as examples, and the encryption method is specifically: by transmitting the upstream data of ONU1 and ONU2 to the OLT as a secret key and performing an XOR operation with the downstream data detected on the OLT The encrypted data is obtained, so as to realize the encryption of the downlink data. After the encrypted data is transmitted downlink to ONU1 and ONU2 through the downlink subcarrier, ONU1 and ONU2 decrypt according to the uplink data stored locally to obtain the decrypted downlink data.

[0033] When the uplink data and downlink data are asymmetrical, the asymmetric coefficient A is calculated according to (A-1)<(Rd / Ru)≤A, and the uplink data is repeated A times to perform the encryption operation of XOR operation, wherein: Rd and Ru are data rates of downlink data and uplink data respectively.

[0034] The encrypted data for downlink transmission is divided ...

Embodiment 2

[0055] Such as Image 6 As shown, the device based on the method described in Embodiment 1 includes: an exclusive OR module arranged in the OLT for encryption calculation, an asymmetric data rate calculation module, an exclusive OR module arranged in each ONU for decryption, and an uplink data storage module, wherein: the output end of the asymmetric data rate calculation module is connected to the XOR module used for encryption calculation and outputs the asymmetric transmission coefficient when the uplink data and downlink data are asymmetric; the XOR module used for encryption calculation is composed of The terminal transmits the encrypted downlink data to the XOR module used for decryption in each ONU, and the XOR module used for decryption is connected to the uplink data storage module, so as to obtain the decrypted downlink data from the encrypted data.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Disclosed is a physical layer encryption / decryption method based on ONU (optical network unit) end time-varying keys in an OFDM-PON (orthogonal frequency division multiplexing-passive optical network) in the field of safety communication. Up data of each ONU are uploaded to an OLT (optical line terminal) to serve as a key and subjected to exclusive or operation with down data detected on the OLT to obtain encrypted data, so that the down data are encrypted, the encrypted data are downloaded to each corresponding ONU through down subcarriers, and then each ONU performs decryption according to locally stored up data to obtain decrypted down data. The keys vary along with the up data in real time, and encryption reliability is further realized, so that the safety feature of an OFDM-PON system is effectively improved.

Description

technical field [0001] The present invention relates to a method in the field of secure communication, in particular to an OFDM-PON (Orthogonal frequency division multiplexing-passive optical network) based on an ONU (Optical Network Unit, The physical layer encryption / decryption method of the time-varying secret key at the optical network unit) end. Background technique [0002] Information and communication technology has brought earth-shaking changes to human society. With the impact of various video services and large data traffic on the system, the bandwidth required by the access network system has increased sharply. Therefore, new technologies are needed to increase the access network. The capacity of the system, at the same time, with the popularization of network transactions, electronic banking, and e-commerce, the security of the network system needs to be effectively protected. [0003] In the passive optical access network system, the time-division multiplexing...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04L9/32H04L9/08H04L27/26
Inventor 曹攀胡小锋尹茜吴佳旸苏翼凯
Owner SHANGHAI JIAO TONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com