KR20060028952A - Rfid tag and reader for information protection and method for information transmitting/receiving using it - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a wireless electronic tag and a reader having an information protection function and an information transmission / reception method using the same.

2. The technical problem to be solved by the invention

The present invention has information protection processing means in a wireless electronic tag and a reader, respectively, and encrypts transmission and reception information using a predefined key value and encryption algorithm between the wireless electronic tag and the reader, thereby strengthening information security and transmitting and receiving electronic information. The purpose of the present invention is to provide a wireless electronic tag and reader having an information protection function and a method for transmitting and receiving information using the same.

3. Summary of Solution to Invention

The present invention provides a reader having an information protection function, comprising: oscillating means for generating an operating frequency inside the reader; Peak detection means for detecting a peak from a radio signal received from the radio electronic tag; Processing means for filtering, amplifying and shaping processing to extract recognition information from the signal detected by the peak detecting means; Information protection processing means for decrypting the information extracted by said processing means and transmitting it to data processing means, and encrypting the data received from said data processing means; The data processing means for processing data received from the information protection processing means; And power amplification means for receiving and amplifying an encrypted signal to be transmitted from the information protection processing means to the wireless electronic tag.

4. Important uses of the invention

The present invention is used in radio frequency identification system.

RFID Tag, Reader, Information Protection, Information Transmission, Selective Key Value Selection, Radio Frequency Identification (RFID) System

Description

RFID tag and reader for information protection and method for information transmitting / receiving using it}             

1 is a configuration diagram of an embodiment of a radio frequency identification system to which the present invention is applied;

2 is a detailed configuration diagram of an embodiment of a wireless electronic tag and reader having an information protection function according to the present invention;

3 is a flowchart illustrating an embodiment of a method for transmitting / receiving information in a reader according to the present invention;

4 is a flowchart illustrating a method of transmitting and receiving information in a wireless electronic tag according to the present invention.

* Explanation of symbols for the main parts of the drawings

11: Reader 12: Wireless Electronic Tag (RFID)

13: Information Processing System 201: Oscillator

202: data processor 203: power amplifier

204: processing unit 205: information protection processing unit                 

206: peak detector 211: sync signal detector

212: power supply unit 213: command analysis unit

214: information protection processing unit 215: data storage unit

216 modulator

The present invention relates to a wireless electronic tag and a reader having an information protection function and an information transmission / reception method using the same. More particularly, the wireless electronic tag and the reader have information protection processing means and are defined in advance between the wireless electronic tag and the reader. The present invention relates to a wireless electronic tag having an information protection function and a reader, and an information transmitting / receiving method using the same for encrypting transmission / reception information using a key value and an encryption algorithm.

The present invention relates to a radio frequency identification (RFID) system or a radio electronic tag system, wherein the radio frequency identification (RFID) system is based on an increase in the demand for eliminating the disadvantages of an information recognition system based on an existing barcode system and a magnetic system. It has been developed accordingly and its application is being activated in various fields. In addition, by recording desired information in a wireless-based electronic tag and obtaining data in a non-contact manner when necessary, it is widely used in service fields such as recognition, identification, and tracking of people, objects, and animals.                         

1 is a configuration diagram of an embodiment of a radio frequency identification system to which the present invention is applied.

As shown in FIG. 1, a radio frequency identification (RFID) system to which the present invention is applied includes a radio electronic tag 12 (commonly referred to as a 'tag') that stores an ID and information. A reader 11 for reading the information of the wireless electronic tag 12, and an information processing system 13 for processing the information of the wireless electronic tag 12 read through the reader (11). Here, the wireless electronic tag 12 and the reader 11 are wirelessly connected, and the reader 11 and the information processing device 13 are connected by wire.

In general, the wireless electronic tag 12 is also called a transponder, which is a compound word of a transmitter / responder. The wireless electronic tag 12 includes a memory that stores data, an integrated (IC) circuit, a microprocessor, an antenna, and the like.

Meanwhile, the wireless electronic tag 12 is a passive wireless electronic tag when there is no power source or an active wireless electronic tag when it has its own power source depending on the presence of an internal energy source. Active tags with power inside can be recognized at greater distances than passive wireless electronic tags powered by inductive current. In the case of the passive wireless electronic tag, when the activated wireless electronic tag receives radio waves of the reader and transmits its ID or information into a category that can be read by the reader, the reader 11 receives the information through the antenna. After that, it provides a service through data processing such as transferring it to an information processing system or comparing the information with a database.

The antenna circuit of the wireless electronic tag 12 is composed of an LC resonant circuit or an electromagnetic dipole antenna according to a transmission frequency. The LC resonant circuit has a strong magnetic field between the reader 11 and the wireless electronic tag 12 at a frequency smaller than 100 MHz. The energy generated from the inductive voltage is supplied from the antenna of the reader 11 to the coil antenna of the wireless electronic tag 12 through the antenna of the reader 11. The radio signal between the radio electronic tag 12 and the reader 11 converts the base signal into a high frequency signal using various modulation methods for modulating amplitude, frequency, and phase to transmit and receive data.

The command from the application service system transmits data after performing a communication initialization procedure between the reader 11 and the wireless electronic tag 12 and authentication according to a read command of the reader 11. As a method of accessing information between the reader 11 and the wireless electronic tag 12, a collision avoidance or collision avoidance method such as carrier sense multiple access / collision detection (CSMA / CD) or carrier sense multiple access / collision avoidance (CSMA / CA) This is being applied.

In addition, in case of AFA that is difficult to apply the Spread Spectrum (DSSS) or the Frequency Hopping Spread Spectrum (FHSS) scheme, which is a wireless communication scheme that is used as a data transmission / reception method, AFA The application of the concept of Adaptive Frequency Agility is also used as a method of data protection.

However, in the conventional radio frequency identification system, due to the economical efficiency of the radio electronic tag or the complexity of applying an encryption algorithm, various mutual authentication methods and data encryption are not applied for information access and data exchange between the radio electronic tag and the reader period. Plain text transmission and reception method is applied.                         

Therefore, it is possible to apply the conventional radio frequency recognition system economically and there is a need for a method for transmitting and receiving information with enhanced information security.

The present invention has been proposed to solve the above necessity, by having information protection processing means in the wireless electronic tag and the reader, respectively, by encrypting transmission and reception information using a predefined key value and encryption algorithm between the wireless electronic tag and the reader, It is an object of the present invention to provide a wireless electronic tag and a reader having an information protection function and an information transmitting / receiving method using the same for enhancing information security so as to transmit and receive electronic information.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. In addition, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

An apparatus of the present invention for achieving the above object, the reader having an information protection function, oscillating means for generating an operating frequency inside the reader; Peak detection means for detecting a peak from a radio signal received from the radio electronic tag; Processing means for filtering, amplifying and shaping processing to extract recognition information from the signal detected by the peak detecting means; Information protection processing means for decrypting the information extracted by said processing means and transmitting it to data processing means, and encrypting the data received from said data processing means; The data processing means for processing data received from the information protection processing means; And power amplification means for receiving and amplifying the encrypted signal to be transmitted from the information protection processing means to the wireless electronic tag.

In addition, the method of the present invention, a method for transmitting and receiving information in a reader, the command selection step of selecting a corresponding command for processing information of the wireless electronic tag; A key value selection step of selecting a key value for encrypting the selected command; An encryption step of selecting the wireless electronic tag and a predefined encryption algorithm to encrypt using the key value; Transmitting the encrypted command to the wireless electronic tag; Ascertaining that key value ranges are matched upon receiving an encrypted result from the wireless electronic tag; Decrypting the received result as the checked key value ranges match; And a data processing step of processing the decoded data.

On the other hand, another apparatus of the present invention is a wireless electronic tag having an information protection function, comprising: sync signal detecting means for detecting and synchronizing a sync signal from a radio signal received from a reader; Power supply means for supplying power into the wireless electronic tag; Command interpreting means for interpreting a command received from the reader; Data storage means for storing an ID, a key value, and an encryption algorithm of the wireless electronic tag; Information protection processing means for decrypting data received from said command interpreting means using information stored in said data storing means and encrypting data to be transmitted to said reader; And modulation means for modulating the data received from the information protection processing means.

In addition, another method of the present invention, a method for transmitting and receiving information in a wireless electronic tag, comprising the steps of: confirming whether the key value ranges match when receiving an encrypted command from the reader; Decrypting the received command according to the identified key value ranges; An instruction execution step of executing the decrypted instruction; Encrypting data to be transmitted to the reader using a predefined key value and an encryption algorithm; And a result transmission step of transmitting the encrypted result to the reader.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a detailed configuration diagram of an embodiment of a wireless electronic tag and reader having an information protection function according to the present invention.

As shown in FIG. 2, the reader 11 having the information protection function according to the present invention is received from the oscillator 201 and the wireless electronic tag 12 for generating an operating frequency inside the reader 11. A peak detector 206 for detecting peaks from a wireless signal, a processor 204 for processing filtering, amplification and shaping for extracting recognition information from the signal detected by the peak detector 206, and the processor 204. Decode the information extracted from the data processing unit 202 to pass, and the data protection processing unit 205 for encrypting the data received from the data processing unit 202, processing the data received from the information protection processing unit 205 A data amplifier 202 and a power amplifier 203 for receiving and amplifying an encrypted signal to be transmitted from the information protection processor 205 to the wireless electronic tag 12. All.

On the other hand, the wireless electronic tag 12 having the information protection function according to the present invention, the synchronization signal detection unit (Clock) 211 for detecting and synchronizing the synchronization signal from the radio signal received from the reader 11, the reader Power supply unit 212 for supplying the power received from the (11) or its own power into the wireless electronic tag 12, a command analysis unit 213 for analyzing the command received from the reader 11, the wireless Data received from the command interpreter 213 using the data storage unit 215 storing the ID, key value and encryption algorithm of the electronic tag 12 and the information stored in the data storage unit 215. An information protection processor 214 for decrypting and encrypting data to be transmitted to the reader 11, and a modulation unit 216 for modulating the data received from the information protection processor 214.

That is, when the reader 11 wants to obtain the information of the wireless electronic tag 12, the wireless electronic tag 12 is encrypted by using the information protection processor 205 using a predefined key value and an encryption algorithm. To send.

Then, the wireless electronic tag 12 that receives the command of the encrypted reader 12 passes through the command interpreter 213 and checks the command through the information protection process of the information protection processor 214, thereby reading the reader 11. ). In the case of the command of the reader 11 authenticated through the above process, the ID (ID) and information of the data storage unit 215 are used through a process of the information protection processing unit 214 using a predefined key value and encryption algorithm. After encrypting the data, the data is transmitted to the reader 11 through the modulator 216.

The reader 11 receiving the encrypted data from the wireless electronic tag 12 checks the information from the wireless electronic tag 12 again through the process of the information protection processing unit 205, thereby preventing the wireless electronic tag 12 from being transmitted. You will be checking the validity of the authentication and message.

Here, encryption for authentication and information protection between the reader 11 and the wireless electronic tag 12 is performed by applying a symmetric or asymmetric encryption algorithm.

3 is a flowchart illustrating a method of transmitting and receiving information in a reader according to the present invention.

First, an initialization process of the reader 11 is performed (301).

Thereafter, the reader 11 selects a corresponding command (eg, read, write, location tracking) for information processing of the wireless electronic tag 12 (302), and selects a key value for encryption (303). At this time, the key value may be a key value promised 1: 1 between the reader 11 and the wireless electronic tag 12, or may be a key value promised as a group (1: N).

Thereafter, encryption is performed by selecting an encryption algorithm (304). In this case, since the encryption algorithm can apply all of several algorithms (symmetric key or asymmetric key encryption algorithm), the corresponding wireless electronic tag and a predefined encryption algorithm are selected.

Thereafter, the command is transmitted to the wireless electronic tag 11 (305).

Thereafter, as the reader 11 receives the encrypted result from the wireless electronic tag 12 (306), it is determined whether the key value ranges match (307).

If the determination result 307 and the key value range match, the received result is decrypted (308), and the decrypted data is processed (309).

On the other hand, if the determination result 307, the key value range does not match, it ends.

4 is a flowchart illustrating a method of transmitting and receiving information in a wireless electronic tag according to the present invention.

First, an initialization process of the wireless electronic tag 12 is performed (401).

Then, upon receiving the encrypted command from the reader 11 (402), it is determined whether the key value ranges match (403).

If the determination result 403 does not match the key value range, the process ends.

On the other hand, if the determination result 403, the key value range is matched, the received command is decrypted (404), the decrypted command is executed (405), and the data to be transmitted correspondingly with the predefined key value and encryption algorithm. Encrypt (406).

Thereafter, the result of the encryption is transmitted to the reader 11 (407).

The encryption algorithm used in the above-described embodiment applies both a symmetric key or an asymmetric key encryption algorithm that can be implemented in the form of hard-wired logic without the need for computing logic (software) on the wireless electronic tag. It can be implemented.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

The present invention as described above, the information security processing means in the wireless electronic tag and the reader, respectively, by encrypting the transmission and reception information using a predefined key value and encryption algorithm between the wireless electronic tag and the reader, thereby economically strengthening information security There is an effect that can transmit and receive electronic information.

Claims (7)

In reader with information protection function, Oscillating means for generating an operating frequency inside the reader; Peak detection means for detecting a peak from a radio signal received from the radio electronic tag; Processing means for filtering, amplifying and shaping processing to extract recognition information from the signal detected by the peak detecting means; Information protection processing means for decrypting the information extracted by said processing means and transmitting it to data processing means, and encrypting the data received from said data processing means; The data processing means for processing data received from the information protection processing means; And Power amplification means for receiving and amplifying an encrypted signal to be transmitted to the wireless electronic tag from the information protection processing means; Reader with an information protection function including a. In the wireless electronic tag having an information protection function, Synchronizing signal detecting means for detecting and synchronizing a synchronizing signal from a radio signal received from the reader; Power supply means for supplying power into the wireless electronic tag; Command interpreting means for interpreting a command received from the reader; Data storage means for storing an ID, a key value, and an encryption algorithm of the wireless electronic tag; Information protection processing means for decrypting the data received from the command interpreting means using the information stored in the data storing means and encrypting the data to be transmitted to the reader; And Modulation means for modulating data received from the information protection processing means Wireless electronic tag having an information protection function comprising a. The method of claim 2, The encryption algorithm of the data storage means, Wireless electronic tag with information protection, characterized in that implemented in the form of hard-wired logic (Hard-wired Logic). In the information transmitting and receiving method in the reader, A command selection step of selecting a corresponding command for processing information of the wireless electronic tag; A key value selection step of selecting a key value for encrypting the selected command; An encryption step of selecting the wireless electronic tag and a predefined encryption algorithm to encrypt using the key value; Transmitting the encrypted command to the wireless electronic tag; Ascertaining that key value ranges are matched upon receiving an encrypted result from the wireless electronic tag; Decrypting the received result as the checked key value ranges match; And A data processing step of processing the decoded data Information transmission and reception method in the reader comprising a. The method of claim 4, wherein The key value selection step, And a key value defined one to one between the reader and the wireless electronic tag. The method of claim 4, wherein The key value selection step, And a key value defined as a group (1: N) between the reader and the wireless electronic tag. In the method of transmitting and receiving information in a wireless electronic tag, Verifying that the key value ranges match upon receiving an encrypted command from the reader; Decrypting the received command according to the identified key value ranges; An instruction execution step of executing the decrypted instruction; Encrypting data to be transmitted to the reader using a predefined key value and an encryption algorithm; And A result transmitting step of transmitting the encrypted result to the reader Information transmission and reception method in a wireless electronic tag comprising a.

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