Method for ensuring wireless data transmission by using fountain code-based symmetrical encryption

Abstract

The present invention discloses a method for ensuring wireless data transmission by using fountain code-based symmetrical encryption. The method comprises the following steps that: 1) K encrypted source data packets are obtained; 2) fountain code encoding packets are obtained, the serial numbers and encoding information of the fountain code encoding packets are interposed into the headers of the fountain code encoding packets; 3) when a legitimate receiving end successfully completes fountain code decoding according to the received fountain code encoding packets, and restores the encrypted source data packets, the legitimate receiving end constructs a serial number set V according to the serial numbers of all the currently-received fountain code encoding packets; 4) a legitimate transmitting end performs XOR encryption on a random bit sequence k by using fountain code encoding packet data corresponding to all serial numbers in the serial number set V so as to obtain an encrypted random bit sequence k'; and 5) the legitimate receiving end decrypts the encrypted random bit sequence k' to obtain the random bit sequence k, and then decrypts the encrypted source data packets according to the random bit sequence k to obtain original data streams. With the method adopted, the security of wireless data transmission can be effectively improved, and the feedback load of the legitimate receiving end can be decreased.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a method for realizing symmetric encryption by using a fountain code to ensure safe transmission of wireless data. Background technique [0002] Compared with the traditional wired communication network, the openness of the wireless communication network makes the secure transmission of data more difficult to realize, because eavesdroppers can easily eavesdrop on the information transmitted between wireless terminals. In order to obtain confidentiality, traditional encryption technology usually adopts symmetric encryption or asymmetric encryption technology in the upper layer protocol, but in dynamic wireless network, traditional encryption technology faces some problems such as key distribution in symmetric encryption and asymmetric encryption in asymmetric encryption. High computational complexity, which limits the usage scenarios of traditional encryption technolo...

AI Technical Summary

Problems solved by technology

[0002] Compared with traditional wired communication networks, the openness of wireless communication networks makes the secure transmission of data more difficult to achieve, because eavesdroppers can easily eavesdrop on the information transmitted between wireless terminals

In order to obtain confidentiality, traditional encryption technology usually adopts symmetric encryption or asymmetric encryption technology in the upper layer protocol, but in dynamic wireless network, traditional encryption technology faces some problems such as key distribution in symmetric encryption and asymmetric encryption in asymmetric encryption. High computational complexity, which limits the usage scenarios of traditional encryption technology to a certain extent

[0003] Fountain code is a rate-free erasure code, mainly including LT code and Raptor code. In the existing technology, it is easy to be eavesdropped by eavesdroppers in the process of wireless data transmission using fountain code. The security of information transmission poor

In some existing schemes that use fountain codes to realize secure wireless data transmission, whenever the legal receiver receives a fountain code packet, it will send a feedback signal to the legal sender, so the feedback load is relatively large

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