TWI387294B - Wireless data security transmission system with zigbee chips - Google Patents

Description

ZigBee wireless network data security transmission system

The invention relates to a secure wireless network transmission system, in particular to a transmission of an encrypted network using ZigBee for timing update, and the receiving end also decrypts the encrypted network with ZigBee, and the data is decrypted. The road key is combined with the algorithm for compaction, and then transmitted by another wifi (wireless fidelity) chip.

In recent years, personal computers have become the most popular home appliances. Personal computers are dominated by multimedia functions in the past, and almost all computers that have been sold have built-in network functions. The notebook computer further has the function of wireless Internet access. Individual users use the Internet function of the computer to connect to the Internet to search or exchange information, send and receive goods, e-mails, invest in domestic and foreign securities, or talk, so that the users at both ends of the network are like the neighbors on the lower floor. . In addition, in addition to the above functions, computers in small, medium, and large enterprises provide an internal network department to provide employees with the means to exchange data files and access the company's server database.

The function of the Internet is far-reaching, it not only provides people to use the Internet to collect information. Today, it has actually become a platform for video and audio exchange (Bugege blog). The user simply connects his computer to the Internet via a network connection to an ADSL data cable or cable TV cable. Generally speaking, as long as the network cards of two computers are connected to the Internet or the internal server via the network route, the files stored in one computer can be transmitted to another computer. What's more, wireless communication is progressing rapidly, and more and more individual users and enterprises are already using it, or consider using a wireless network to reduce the embarrassment of the network route.

The wireless network can be used to transmit a variety of data, including image format files, sound formats, or video and audio formats, file format files, or application formats. However, compared with physical networking networks, wireless network security is often one of the important reasons for the opposition of wireless networks. In particular, wireless networks are less than wired networks. One of the reasons for reassurance is that the data transmission was intercepted and the sender and the designated recipient were unaware of it.

Although a known wireless network base station and a client can use a network key to protect the security of the network. However, in the prior art, as far as the inventor's knowledge is concerned, these network keys are mostly fixed once they are set. Only after a period of time will it change again. As a result, it is easy to become an object of Internet hacking attacks. The other is that the user must be close to the base station to force the change of the network key. Therefore, this method is inconvenient. In addition, the security of the network key transmission itself is often an important issue.

The invention utilizes the ZigBee chip of the ZigBee/802.15.4 communication protocol for the compaction and decryption of the network key. ZigBee chips can be easily combined with microprocessors to access digital data and perform data compaction and decryption. ZigBee chips are transmitted in the frequency band between 2.4 and 2.5 GHz. In addition, the network key is used to re-encrypt and decrypt the data to be transmitted with the wifi chip. The hacker must simultaneously crack the data compacted by two different wafers to obtain clear text.

Therefore, it is an object of the present invention to provide a data transmission method that is more convenient and safe for a user.

An object of the present invention is to provide a system for secure transmission of wireless networks, whereby a system data can be safely transmitted from a land to a ground.

The invention discloses a system for secure transmission of wireless network data, comprising: a network key central control end comprising a first Zigbee chip and a computer terminal interface, and a network key calculation program to provide a user utilization network The road key calculus program sets a predetermined unit time and a parameter according to the change of the network key, and generates a compact network key every predetermined unit time and distributes it to a data transmitting end. And at least one data receiving end. The data sending end includes a second Zigbee chip, a first wifi chip and a data to be transmitted, or dynamically generated video and audio data. The second Zigbee chip decrypts the compacted network key into a plaintext network key, and then compacts the data to be transmitted or the dynamically generated audio and video data into a 64-bit ciphertext by using the first wifi chip, and then The first wifi chip transmits the ciphertext to the data receiving end. The data receiving end includes a third Zigbee chip and a second wifi chip. The third Zigbee chip is decrypted into a plaintext network key after receiving the compacted network key, and the second wifi chip decrypts the ciphertext into plaintext data according to the plaintext network key.

The invention provides a method for transmitting compressed data by using a wireless network chip (for example, a wafer conforming to wIFI), and transmitting the compressed network key to the transmitting end and each receiving end of the data by using a ZigBee chip in a wireless communication manner. In order to encrypt the data transmitted by the sender, and decrypt the data with the receiver.

Please refer to the schematic diagram shown in FIG. 1 for a system architecture of the present invention. It includes a network key generation terminal 10, a data transmitting end 20 and a plurality of receiving ends 30, 40, for example, a first data receiving end 30 and a second data receiving end 40. The network key generation terminal 10 is provided with a computer or terminal 10d, a ZigBee chip 10a, and an antenna 10b. The data transmitting end 20 includes a ZigBee chip 20a, an antenna 20b, and a wifi chip 20c. The first data receiving end 30 has the same configuration as the data transmitting end 20, and includes a ZigBee chip 30a, an antenna 30b, and a wifi chip 30c. The second data receiving end 40 also has the same equipment, and includes a ZigBee chip 40a, an antenna 40b, and a wifi chip 40c.

The ZigBee chips 10a, 20a, 30a, 40a, please refer to FIG. 2, all including the same module: a receiving module 70, a transmission module 75, a MAC (media access control) The module 80, a transmit/receive/MAC control interface 85, a transmission channel detection module 90, and an MCU (microprocessor) 95. The Transmit/Receive/MAC Control Interface 85 includes an interface to the I/O port 65 of the MCU 60.

The generation terminal 10 of the network key is generated by a user using a computer 10d or a terminal, and is generated by a network key algorithm program, and the user can input, for example, a birthday, a date, a time, or a number. The number-related data is used as a parameter of the algorithm to generate the network key, and is converted to another network key after each unit time after the network key is first generated. The network key is compressed by the ZigBee chip 10a into an RF signal packet by an AES (advanced encryption standard) 128 bit, and then simultaneously transmitted to the data transmitting end 20 and the first data receiving end 30 by the antenna 10b. The second data receiving end 40. The generation and compaction of the network key can be performed by the MCU 60. The data input by the user by the I/O 埠 65 of the MCU 60 is converted into a radio frequency signal by the MAC module 80, and then transmitted through the transmitting module 75. Go out.

After the antenna 20b of the data transmitting end 20 receives the radio frequency signal packet, the receiving module 70 of the ZigBee chip 20a demodulates the AES 128-bit compacted network key via the MAC module 80 to restore the network key of the plaintext. And then supplied to the wifi chip 20c of the data transmitting terminal 20 via the MCU 60. The data at the data transmitting end may be any image format data, sound format data or audio-video mixed format data or graphic format, or text format or one or more of the above-mentioned format data. The data of the data sender and the plaintext network key are transmitted to the wifi chip 20c via the I/O port 65 of the MCU 60 to compact the 64-bit compacted data, and then transmitted through the antenna 20a.

After receiving the AES 128-bit compacted RF signal packet, the antenna 30b of the first data receiving end 30 demodulates the digital signal into a digital signal and decrypts it into a plaintext network key. Alternatively, the wifi chip 30c of the first data receiving terminal 30 decrypts the 64-bit compacted data using the plaintext network key to decrypt the plaintext data.

The same thing is also performed at the second data receiving end 40. After the antenna 40b of the first data receiving end 40 receives the radio frequency signal packet compacted by the AES 128 bit mode, the ZigBee chip 40b is first demodulated into a digital signal and decrypted into a clear text network key. Alternatively, the wifi chip 40c of the second data receiving terminal 40 decrypts the 64-bit compacted data using the plaintext network key to decrypt the plaintext data.

According to a preferred embodiment of the present invention, the network key is changed once per unit time, and is sent to the data transmitting end and the first data receiving end 30, and the second or even the third data receiving end at a time. Even more data receivers.

Therefore, the present invention has the following advantages: 1. The network key is compacted when transmitted.

2. The compact network key and the compacted data are sent by different chips, so it is safer and more reliable.

The present invention has been described above by way of a preferred example, and it is not intended to limit the spirit of the invention and the inventive subject matter. Modifications made without departing from the spirit and scope of the invention are intended to be included within the scope of the appended claims.

The generation of the network key. . . 10

ZigBee chip. . . 10a, 20a, 30a, 40a

Data sender. . . 20

antenna. . . 10b, 20b, 30b, 40b

The first data receiving end. . . 30

Wifi chip. . . 30c, 40c

The second data receiving end. . . 40

Computer or terminal. . . 10d

Receive module. . . 70

Launch module. . . 75

MAC module. . . 80

Transmit/receive/MAC control interface. . . 85

I/O埠. . . 65

MCU. . . 60

The above and other advantages of the invention will be readily apparent from the following detailed description in conjunction with the accompanying drawings in which: FIG. 1 is a schematic diagram of a wireless network secure transmission system in accordance with the present invention.

Figure 2 shows a functional block diagram of the Zigbee chip.

The generation of the network key. . . 10

ZigBee chip. . . 10a, 20a, 30a, 40a

Data sender. . . 20

antenna. . . 10b, 20b, 30b, 40b

The first data receiving end. . . 30

Wifi chip. . . 30c, 40c

The second data receiving end. . . 40

Computer or terminal. . . 10d

Claims (8)

A wireless network data secure transmission system includes at least: a network key central control terminal, comprising a first Zigbee chip and a computer terminal interface, and a network key calculation program to provide a user to utilize the network The road key calculation program sets a predetermined unit time and a parameter according to the change of the network key, and generates a compact network key every predetermined unit time; a data sending end, including the first a second Zigbee chip, a first wifi (wireless fidelity) chip, and a data to be transmitted; a first data receiving end, comprising a third Zigbee chip, a second wifi chip; the network key central control terminal is Transmitting a compact network key to the data sending end and the first data receiving end every predetermined time, the first Zigbee chip of the data sending end decrypts the compacted network key into a plaintext network gold The key is secreted, and the data to be transmitted is compacted into the compacted data by the first wifi chip according to the clear text network key, and then transmitted to the first data receiving end, and the first data receiving end is third. Zigbee wafer is connected After receiving the compacted network key, it will be decrypted into a clear text network key, and the second wifi chip decrypts the compacted data into plaintext data according to the clear text network key. The system for secure transmission of wireless network data according to claim 1, wherein the first Zigbee chip comprises a microprocessor, and the microprocessor is scheduled according to a network key calculation program and a parameter input by a user. The time unit produces different compact network keys. For example, in the system for secure transmission of wireless network data according to claim 1, wherein the parameter input by the user may be digital related data, and the data related to the number may be selected from birthday, date, time and any number. One of the groups of words and their mix. For example, in the system for secure transmission of wireless network data according to claim 1, the predetermined unit time for replacing the compacted network key predetermined by the user is 30 minutes to 120 minutes. For example, the system for secure transmission of wireless network data in the first application of the patent scope, wherein the above-mentioned compacted network key is compacted according to an advanced encryption standard of 128 bits (AES). For example, the system for secure transmission of wireless network data according to item 1 of the patent scope, wherein the above-mentioned compacted data is 64-bit compacted data. For example, the system for secure transmission of wireless network data in the first application of the patent scope, wherein the data to be transmitted may be selected from static image format data, static sound format data, static audio and video mixed format data, dynamic image format. One of a group of data, dynamic sound format data, dynamic audio and video mixed format data, graphic format data, and text format data. The system for secure transmission of wireless network data according to claim 1, wherein the second Zigbee chip includes a microprocessor to decrypt the compact network key, and the third Zigbee chip also includes A microprocessor to decrypt the compacted network key.