A point-to-point data transmission method based on nfc

Abstract

The invention provides an NFC (near field communication)-based point-to-point data transmission method. The method includes that 1, an NFC device A and an NFC device B to be performed the point-to-point transmission all employ the RSA (Rivest, Shamir, Adleman) encryption algorithm to acquire a public key set and a private key set respectively; 2, two ends of each of the NFC device A and the NFC device B generate random numbers Ra and Rb respectively to be bound with each of device identifiers to form ordered pairs, each of the NFC devices uses the public key of the other NFC device to encrypt its own ordered pairs, exchanges ciphertexts of two encrypted pairs and uses the own private key to decrypt the received ciphertexts so as to acquire the random number and the device identifier of the other device; 3, each of the NFC device combines two pairs and then uses the Hash algorithm to generate a session key R; 4, during the data transmission, the session key R is subjected to encrypting the data to be transmitted and splitting the ciphertexts in a mixed manner. In this way, reliability, effectiveness and safety of the NFC-based point-to-point data transmission are guaranteed.

Description

technical field [0001] The invention relates to a point-to-point data transmission method. Background technique [0002] With the continuous development of wireless communication technology, NFC technology has been applied to various industries with its advantages of high transmission bandwidth and low energy consumption since its appearance. It can be said that as an extension of RFID technology, NFC breaks through the limitation that RFID can only realize information reading and judgment, emphasizing that both parties can exchange information at close range. The most important application in the NFC industry chain is the payment industry. Therefore, its security issues have gradually become a hot spot of concern. [0003] At this stage, the security encryption technology of card simulation mode and card reader mode among the three working modes of NFC has become mature. At present, the industry is generally optimistic about NFC technology. The most important thing is that...

AI Technical Summary

Problems solved by technology

As the third important working mode, the point-to-point mode has a serious security risk of plaintext transmission in its transmission process.

Compared with the other two methods, the security of short-distance direct data transfer between mobile devices (such as exchanging business cards, inter-personal transfer of funds, mobile phones transmitting important printing data to NFC printers, etc.) is particularly weak. It is also an urgent problem that needs to be improved

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