Method for guaranteeing secure transmission of wireless data based on fountain codes

Abstract

The invention discloses a method for guaranteeing secure transmission of wireless data based on fountain codes. The method comprises the following steps that each time slot sending end adopts a fountain code method to complete a check package encoding process; after the check package generated at the sending end is subjected to CRC (Cyclic Redundancy Check) coding of a data link layer and channel coding of a physical layer, the check package is sent to a legal user, and a tapping user taps current time slot transmission check package information; when packet loss does not occur in the channel, a legal receiving end completes a decoded operation of the received check package, and updates a set of serial numbers of decoded information packets and feeds the set back to the sending end after correct decoding, otherwise the set of the serial numbers of the decoded information packets is not updated; and the legal receiving end judges whether the number of the successfully decoded information packets is equal to the number of source information packets and decides whether to inform the sending end to stop sending the check package according to the information. According to the method, real-time adjustment of an encoding scheme for the sending end is carried out according to the decoding speed of the legal user, so that the intercept probability for the tapping user in a wireless data transmission process is remarkably reduced and the transmission efficiency of the sending end is improved.

Description

Technical field: [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a method for guaranteeing wireless data secure transmission based on fountain codes, which uses fountain code technology to reduce the interception probability of eavesdropping users during wireless data transmission and improve the transmission efficiency of the sending end. Background technique: [0002] Compared with the cable communication system, the openness of the wireless communication network makes its security transmission problem more difficult, because it is easy for eavesdroppers to eavesdrop on the confidential data at the wireless device end. In view of the potential security risks of eavesdroppers in wireless networks, the existing high-level network protocol layers use encryption technology to ensure that data is not eavesdropped. However, the implementation of encryption technology is based on the assumption that eavesdroppers have lim...

AI Technical Summary

Problems solved by technology

In view of the potential security risks of eavesdroppers in wireless networks, the existing high-level network protocol layers use encryption technology to ensure that data is not eavesdropped. However, the implementation of encryption technology is based on the assumption that eavesdroppers have limited computing power. Unlimited computing power, security cannot be guaranteed

In addition, the key management mechanism is also difficult to implement for dynamic wireless networks

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