KR100419580B1 - A system for upgrading softwares in a terminal using printed code images and authetication method on upgrading - Google Patents

Abstract

The present invention relates to a system for upgrading software mounted on a terminal using a printed code image and an authentication method at the time of upgrading. In such a system, a code image production system generates a specific secret key to encrypt a data string containing software data to be upgraded, and a serial number and a code image corresponding to the encrypted data are specified to correspond to the generated secret key. Produce printed printouts. The authentication server specifies a serial number corresponding to the secret key generated by the code image production system, transfers the serial number to the code image production system, and stores the secret key and the serial number. When the code image printed on the code image printed matter produced and delivered by the code image production system is manually scanned, the user terminal reads the corresponding code image and reproduces the original data, and corresponds to the serial number among the reproduced data. Receives the secret key through the authentication server, decrypts encrypted data among the reproduced data, reproduces the original data sequence, and upgrades the corresponding software using upgrade software included in the reproduced data sequence. . According to the present invention, the terminal user can upgrade the software mounted on his terminal without visiting the service center, and therefore, the upgrade of the entire terminal software can also be carried out in a faster time than in the related art.

Description

System for upgrading software on the terminal using printed code image and authentication method during upgrade {A SYSTEM FOR UPGRADING SOFTWARES IN A TERMINAL USING PRINTED CODE IMAGES AND AUTHETICATION METHOD ON UPGRADING}

The present invention relates to a system for upgrading software mounted on a terminal, and in particular, a system for upgrading software mounted on a terminal through software data printed as a two-dimensional code image optically readable by manual scanning, and an authentication method upon upgrading. It is about.

Conventional terminals, in particular, mobile terminal owners, visit the service center of the mobile communication service provider or the terminal company in order to upgrade the software installed in their terminal, and connect the computer system in which the terminal and the upgrade software are stored to a specific cable. The software inside the terminal has been upgraded by connecting directly through.

Accordingly, a terminal user who wants to upgrade the software installed in the terminal has a disadvantage in that he or she must visit the service center directly with the terminal. There is a problem that can not use the advantage by the terminal upgrade is not implemented.

On the other hand, a dot code, which is a two-dimensional code image for printing and recording voice in an optically readable form on a print medium such as paper, and a recording device for printing and recording the dot code on an predetermined print medium so as to be optically readable. Japanese Patent Laid-Open No. Hei 6-231466 discloses a reading device which manually scans the dot code and reads it optically and then reproduces and outputs information such as original audio information.

1 is a diagram showing a physical format configuration of the dot code.

As shown in Fig. 1, the code image of the dot code 1 is composed of a plurality of blocks 2 arranged adjacently two-dimensionally, and each block 2 is divided for each block of data related to speech. Data area 3 present as a dot image of a white dot or a black dot corresponding to "0" or "1" which is the value thereof, and a reference point for detecting each dot of the data area 3 A marker (4) having a constant black continuous number arranged at four corners of each block (2) used to find a, and the marker (4) so that the plurality of other blocks (2) can be identified at the time of reading It consists of the block address pattern 5 containing the error detection or error correction code arrange | positioned in between.

A dot code having such a physical format configuration is provided to the block even if the size of the image pickup surface of the solid-state image pickup device having a reading device is smaller than that of the entire dot code, that is, the dot code cannot be imaged at one time by the solid-state image pickup device. If each address can be read and recognized, the original data can be reconstructed from the data of each block according to the address. As a result, a large amount of data that cannot be realized in a conventionally well-known one-dimensional or two-dimensional bar code. It is possible to hold the paper on the ground, etc., and to facilitate the transfer of voice information using paper or the like, which can be used in a form that is not conceivable in the prior art.

Accordingly, an object of the present invention is to solve the above-mentioned conventional problems, and provides software data to be upgraded to a printed code image, and a user reads and reproduces the printed code image using his terminal. By providing a system for upgrading the software of the terminal and an authentication method during the upgrade.

1 is a diagram showing a physical format configuration of a dot code recorded on a print medium.

2 is a block diagram of a system for upgrading software mounted on a terminal using a printed code image according to an embodiment of the present invention.

3 is a block diagram of a code image production system of the system of FIG.

4 is a block diagram of a user terminal of the system of FIG.

5 is a flowchart of the operation of the system of FIG.

As a means for achieving the above object, the present invention provides a system for upgrading software mounted on a terminal using a printed code image, generating a specific secret key to encrypt a data string containing the software data to be upgraded, A code image production system for producing a printed material on which a serial number specified to correspond to the generated secret key and a code image corresponding to the encrypted data are printed; An authentication server that specifies a serial number corresponding to the secret key generated by the code image production system, delivers the serial number to the code image production system, and stores the secret key and the serial number; And when the code image printed on the code image printed matter produced and delivered by the code image production system is manually scanned, the code image is read and reproduced as original data, and a secret corresponding to the serial number of the reproduced data is read. A user terminal that receives a key through the authentication server, decrypts encrypted data among the reproduced data, reproduces the original data sequence, and upgrades the corresponding software using the upgrade software included in the reproduced data sequence. It includes.

The code image production system includes a secret key generation unit for generating the secret key;

An encryption unit for encrypting the data string using the secret key generated by the secret key generation unit to generate corresponding encrypted data, and transferring the secret key to the authentication server; And a code image production unit for producing a code image printout on which a serial number transmitted from the authentication server and a code image corresponding to the encrypted data generated by the encryption unit are printed.

The user terminal may include a user interface for receiving a command from a user or displaying information such as an operation state to the user; A wireless communication unit performing wireless communication with the authentication server; A code image reproducing unit which reads and reproduces a code image printed on the code image printed matter; And transmitting a serial number of the data reproduced through the code image reproducing unit to the authentication server through the wireless communication unit, and when a secret key corresponding to the serial number is received from the authentication server through the wireless communication unit. And decrypting the encrypted data in the reproduced data using the upgrade software data of the decrypted data.

The data column contains the title of the upgrade software data to be displayed to the user.

The controller may display the title of the upgrade software data to be displayed to the user among the decrypted data to the user, and receive input of whether to approve the corresponding software upgrade from the user.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a system for upgrading software mounted on a terminal using a printed code image according to an embodiment of the present invention.

As shown in FIG. 2, a system for upgrading software mounted on a terminal using a printed code image according to an exemplary embodiment of the present invention may include a code image production system 100, an authentication server 200, and software. It includes a user terminal 300.

Here, the software of the terminal 300 includes software for controlling functions such as a wireless communication service, for example, a mobile communication service, as well as software related to control for user convenience, for example, a ring function control, a message display function control, and the like. All of the software used in the terminal 300 is applicable.

The code image production system 100 selects a specific secret key, encrypts the software data to be upgraded using the selected secret key, and a serial number specified by the authentication server 200 in association with the software data to be upgraded. And a printed matter on which the code image corresponding to the encrypted data is printed and delivered to the user through a mail.

The authentication server 200 receives a secret key selected from the code image production system 100, specifies a serial number, and transmits the code to the code image production system 100, and stores the secret key and the serial number in a specific storage device. do.

When the user of the terminal 300 manually scans the code image printed on the printed matter produced and transmitted by the code image production system 100 using the terminal 300, the corresponding code The image is read, the read serial number is transmitted to the authentication server 200, and the encrypted encryption data is decrypted using the secret key transmitted from the authentication server 200 to upgrade by the corresponding software data.

Here, both the code image production system 100 and the authentication server 200 may be included in the mobile communication service system, or only one of the code image production system 100 and the authentication server 200 may be included in the mobile communication service system. Alternatively, all of them may be located separately without being included in the mobile communication service system. Preferably, the authentication server 200 is preferably located in the mobile communication service system, and the user terminal is not located in the mobile communication service system. It is well known to those skilled in the art that data transfer between the 300 and the authentication server 200 is performed through a mobile communication service system, and thus, a detailed description thereof will be omitted.

3 is a block diagram of a code image production system 100 of the system of FIG.

As shown in FIG. 3, the code image production system 100 of the system of FIG. 2 includes a secret key generation unit 110, a transceiver unit 120, an encryption unit 130, a compression processing unit 140, and an error correction code processing unit. 150, an interleave processing unit 160, a data adding unit 170, a modulator 180, and a print output unit 190.

The secret key generation unit 110 generates a secret key used for encryption so that terminal upgrade software data, which is information to be recorded as a code image, is not exposed to the outside.

The encryption unit 130 encrypts a specific data string including the upgrade software data using the secret key generated by the secret key generation unit 110 to generate encrypted data. At this time, the format of the data string to be encrypted includes a distinguishing code of content data called terminal upgrade software data, a title of upgrade software data to be displayed to the user, an expiration date, an upgradeable terminal model, a software version, and encrypted data.

The transmitter / receiver 120 transmits the secret key generated by the secret key generator 110 to the authentication server 200, and transmits the serial number received from the authentication server 200 to the compression processor 140.

The compression processor 140 receives and compresses the serial number transmitted from the transceiver 120 and the encrypted data output from the encryption unit 130. Here, the compression method used may be a data compression method generally used.

The error correction code processor 150 performs an error correction code process on the data compressed by the compression processor 140. The error correction code processing performed at this time may use a general error correction code processing method such as a Reed Solomon code.

The interleaving processor 160 interleaves the data corrected by the error correction code processor 150. Interleaving processing is processing performed for countermeasures against burst errors in print recording and code image reading processing, and converts parallel data order by distributing adjacent data.

The data adding unit 170 adds a block address, an error discrimination determination code for an address, and a marker to data output from the interleave processing unit 160.

The modulator 180 modulates the data output from the data adder 170.

The print output unit 190 prints the data modulated by the modulator 180, that is, the code image data on a specific print medium, to finally produce a code image print containing the terminal software data. It is delivered to users who need to upgrade.

In addition, although not shown, the code image production system 100 includes these units 110 to 190 and a controller for controlling the whole.

4 is a block diagram of a user terminal 300 of the system of FIG.

As illustrated in FIG. 4, the user terminal 300 of the system of FIG. 2 may be divided into a portion for performing a terminal-specific operation and a portion for reading and playing back terminal upgrade software data. The operation of both parts is controlled by the controller 355.

First, an antenna 310, a duplexer 320, a wireless receiver 330, a wireless transmitter 340, a mobile station modem 350, a D / A converter 360, A speaker 370, an A / D converter 380, a microphone 390, a liquid crystal display 400, a key input unit 410, and a memory unit 420 are included.

The antenna 310 transmits a radio signal received from the base station to the duplexer 320, and the duplexer 320 separates the transmitted signal and the received signal and transmits the received signal to the wireless receiver 330.

The wireless receiver 330 amplifies a radio signal received from the duplexer 320 and suppresses the received signal into a reception band. The wireless receiver 330 converts the suppressed signal into an intermediate frequency signal according to a specific local oscillation frequency signal, and then returns to the set intermediate frequency band. After suppressing the gain, the suppressed signal is adjusted to a predetermined level, down-converted, and output to the MSM 350.

The MSM 350 demodulates a signal output from the wireless receiver 330, deinterleaves and decodes the demodulated signal, and processes a voice signal to output a digital voice signal.

The digital voice signal output from the MSM 350 is converted into an analog voice signal by the D / A converter 360 and then output to the terminal user through the speaker 370.

Meanwhile, the voice signal input from the terminal user through the microphone 390 is converted into a digital voice signal through the A / D converter 380 and input to the MSM 350.

The MSM 350 processes the voice signal input from the A / D converter 380, interleaves and encodes the signal, modulates the signal, and outputs the modulated signal to the wireless transmitter 340.

The wireless transmitter 340 up-converts the signal output from the MSM 350 and then adjusts the gain, converts the gain-adjusted signal into a wireless signal, and then amplifies and outputs the power to the duplexer 320.

The duplexer 320 separates the signal output from the wireless transmitter 340 into a transmission signal and transmits the signal to the base station through the antenna 310.

The MSM 350 includes a modulation / demodulation unit 351, a deinterleaver and a decoder 352, a digital signal processor (DSP) 353, an interleaver and an encoder 354, and a controller 355.

The modulator 351 demodulates the signal output from the wireless receiver 330 by the CDMA protocol and outputs the signal to the deinterleaver and the decoder 352, and conversely modulates the signal output from the interleaver and encoder 354 by the CDMA protocol. To be output to the wireless transmitter 340.

The deinterleaver and decoder 352 deinterleave and decode the signal output from the modulator 351 and output the deinterleaver and decoder 351 to the DSP 353 for speech processing. The interleaver and encoder 354 are DSP for speech processing. An interleaving and encoding operation is performed on the signal output from 353 to be output to the demodulation / demodulation unit 351.

The DSP 353 for speech processing processes the signals output from the deinterleaver and the decoder 352, and outputs them to the D / A converter 360 as digital voice data, and the digital voices output from the A / D converter 380. The data is voice-processed and output to the interleaver and encoder 354.

The controller 355 controls the demodulator 351, the deinterleaver and decoder 352, the DSP 353 for voice processing, and the interleaver and encoder 354, which are internal components of the MSM 350, and at the same time, an external configuration. The liquid crystal display 400, the key input unit 410, and the memory unit 420, which are elements, are controlled.

The liquid crystal display 400 displays various screens to be displayed to the user of the user terminal 300, in particular, such as a terminal software upgrade menu, under the control of the control unit 355 in the MSM 350, and the key input unit 410 displays a number. And a plurality of keys for inputting characters and various function keys to transmit the input of the terminal user to the controller 355.

In addition, the memory unit 420 includes an electrically erasable programmable read only memory (EEPROM), a flash ROM, a random access memory (RAM), and the like, and under the control of the controller 355, various data necessary for the terminal, in particular, are read out. Stores upgrade software data that is played back.

On the other hand, the part performing the operation of reading and reproducing the terminal upgrade software data includes a detector 430, a scan converter 440, a data string adjuster 450, an error corrector 460, a decompressor 470, Decryption unit 480 is included.

The detection unit 430 includes a solid state imaging device such as a CCD for capturing a code image on a code image printed matter transferred from the code image production system 100.

The scan conversion unit 440 recognizes the captured image data supplied from the detection unit 430 as a code image image and performs normalization. Specifically, after storing the image data output from the detection unit 430, a marker for each block is detected from the stored data, and the detected marker is used to detect rotation or inclination, an arrangement direction of the data, and the like. The stored original image data is interpolated using the result, and output as corresponding "0" or "1" data from a dot image of a white dot or a black dot.

The data string adjusting unit 450 adjusts a column of data output from the scan converter 440 and performs demodulation processing. More specifically, after detecting the block address of the two-dimensional block from the data output from the scan converter 440, and performing error correction of the detected block address, and storing the data in the block unit, for the stored data After the deinterleaving process is performed to convert the data stream into a formal data stream, demodulation processing is performed on the data stream.

The error correction unit 460 corrects a read error or a data error at the time of reproduction with respect to the data output from the data string adjustment unit 450.

The decompression unit 470 decompresses the data output from the error correction unit 460.

The data reproduced by the decompressor 470 includes a serial number and encrypted data, and the encrypted data includes the identification code of the content data called the terminal upgrade software data, the title of the upgrade software data to be displayed to the user, the validity period, and the upgradeable data. A terminal model, a software version, encrypted data, and the like are included. These reproduction data are stored in the memory unit 420 and used for upgrading the terminal software.

The decryption unit 480 decrypts the encrypted data reproduced by the decompression unit 470 using the secret key supplied from the authentication server 200 by the control unit 355 to include the actual terminal upgrade software data. Various data are reproduced and stored in the memory unit 420.

The controller 355 may upgrade the user terminal 300 using the terminal upgrade software data stored in the memory unit 420.

Hereinafter, with reference to the accompanying Figure 5 will be described the operation of the system for upgrading the software mounted on the terminal using the printed code image according to an embodiment of the present invention.

First, the secret key generation unit 110 of the code image production system 100 generates a specific secret key for encrypting the software data to be upgraded in the terminal (S100), and transmits it to the encryption unit 130, the encryption unit ( 130 performs encryption so that the terminal upgrade software data is not exposed to the outside by using the transferred secret key to generate corresponding encryption data and transmits the encrypted data to the compression processor 140 (S110). In this case, the data string encrypted by the encryption unit 130 includes a variety of data in addition to the terminal upgrade software data, the format of the data string is the identification code of the content data called the terminal upgrade software data, the upgrade software data to be displayed to the user It consists of the title, expiration date, upgradeable terminal model, software version, and encrypted data.

On the other hand, the secret key generation unit 110 transmits the generated secret key to the authentication server 200 through the transmission and reception unit 120 (S120), the authentication server 200 is the transmission and reception unit of the code image production system 100 After receiving the secret key delivered through 120 generates a serial number indicating the terminal upgrade software (S130), and stores it in a specific storage device with the delivered secret key (S140).

In this case, when there is a lot of data to be converted into a terminal upgrade software or another form of code image, since corresponding secret keys and corresponding serial numbers are also large, it may be necessary to manage them in a database. .

In this way, the serial number generated by the authentication server 200 is transmitted to the compression processing unit 140 through the transmission and reception unit 120 of the code image production system 100 (S150), the compression processing unit 140 is the authentication server The serial number transmitted from the 200 and the encrypted data generated by the encryption unit 130 are compressed, and the error correction code processing is performed by the error correction code processing unit 150, and the interleaved processing unit 160 is compressed. The interleaving process is performed by the data adding unit 170, and the block address, the error discrimination determination code for the address, and the marker are added by the data adding unit 170, and then modulated by the modulator 180 and output as code image data (S160). The print output unit 190 generates a code image print using the code image data output from the modulator 180 (S170).

The code image printout thus produced is transmitted to users who own the terminal 300 that needs to upgrade the software (S180).

Meanwhile, the user of the terminal 300 first uses the key input unit 410 to read and reproduce the software data from the printed material on which the code image corresponding to the terminal upgrade software delivered to the terminal software is printed. Select the upgrade feature.

At this time, the user of the internal components of the terminal 30, that is, the antenna 310, the duplexer 320, the wireless transmitter and receiver 330, 340, MCM 350, D / A rice converter 360 Receiving mobile communication service using the A / D converter 380, the speaker 370, the microphone 390, the liquid crystal display 400, the key input unit 410, and the memory unit 420 can be easily understood by those skilled in the art. As it will be understood, the description thereof is omitted here, and only the operation of performing a software upgrade by reading and reproducing the code image will be described.

After the user selects the terminal software upgrade function as described above, if the detection unit 430 of the terminal 300 is touched toward the corresponding code image, that is, the image of the dot code 1, and manually scanned, the dot code 1 Images are sequentially picked up (S190). At this time, even if the imaging range is covered only a part of the dot code 1, the whole of the dot code 1 can be imaged as a result by the movement of the terminal 300. In order to accurately determine the position of the dot from each image picked up over a plurality of frames by manual scanning, the scan conversion unit 440 operates as follows.

First, the marker 4 serving as the reference position is detected, and then the matching dot pattern 7 in the block 2 is read. The detection of the marker 4 is performed by using the feature of large dot size from the picked-up image. Then, the matching dot pattern 7 arrange | positioned between the markers 4 is searched, and the center coordinate of each dot with respect to the matching dot pattern 7 is calculated | required. Next, the reading reference point of each dot 6 in the data area 3 is obtained from these center coordinates using the least square method, etc., and the reading point (coordinate) of the dot 6 is based on this. Location). A corresponding data string of "0" or "1" is generated from the dot images of the white dots or black dots at the read points thus obtained.

Next, the generated data string is demodulated and deinterleaved by the data string adjusting unit 450, and then the error is corrected by the error correcting unit 460, and then decompressed by the decompressing unit 470. The compression processing unit 140 of the code image production system 100 reproduces the data stream before compression processing (S200).

The reproduced data consists of a serial number and encrypted data, and the control unit 355 of the terminal 300 transmits the reproduced serial number to the authentication server 200 through the mobile communication service (S210).

The authentication server 200 receiving the reproduced serial number from the terminal 300 determines whether the corresponding serial number is correct (S220, S230), and if the determined serial number is not correct, ends the software upgrade function. Alternatively, the step S22 and S230 may be repeated after requesting retransmission of the serial number.

Meanwhile, if the determined serial number is correct, the secret key corresponding to the serial number stored in the storage device or the database in the authentication server 200 is searched and transmitted to the user terminal 300 through the mobile communication service (S240).

The control unit 355 of the user terminal 300 transfers the secret key transmitted from the authentication server 200 to the decryption unit 480, and the decryption unit 480 uses the decompression unit using the transferred secret key ( By decrypting the encrypted data reproduced by 470 to restore the various data including the actual terminal upgrade software to the original state (S250).

Next, the controller 355 displays the title of the upgraded software among the decrypted data on the liquid crystal display 400 so that the user can view it (S260), and the user displays the title of the upgrade software displayed on the liquid crystal display 400. To determine whether to approve the upgrade of the software of the title to his terminal (300) (S270). If the user does not approve to upgrade the software of the title, the upgrade operation of the software is terminated. If the user approves, the control unit 355 stores the data decrypted by the decryption unit 480 in the memory. Stored in the unit 420 (S280), using the actual upgrade software data of the data to upgrade the software of the terminal 300 (S290).

Although the present invention has been described with reference to the most practical and preferred embodiments, the present invention is not limited to the above disclosed embodiments, but also includes various modifications and equivalents within the scope of the following claims.

According to the present invention, the terminal user can upgrade the software mounted on his terminal without visiting the service center, and therefore, the upgrade of the entire terminal software can also be carried out in a faster time than in the related art.

Claims (8)

A system for upgrading software mounted on a wireless communication terminal using a printed code image, Code for generating a specific secret key to encrypt a data string containing software data to be upgraded, and for producing a printout with a specified serial number corresponding to the generated secret key and a code image corresponding to the encrypted data Image production system; An authentication server that specifies a serial number corresponding to the secret key generated by the code image production system, delivers the serial number to the code image production system, and stores the secret key and the serial number; And Code image printed and produced by the code image production system, wherein the code image print includes a code image corresponding to the serial number. And reproduces the serial number included in the reproduced data to the authentication server through wireless communication using a secret key corresponding to the serial number transmitted from the authentication server through wireless communication. A user terminal for wireless communication that decrypts the encrypted data from the data and plays back the original data sequence, and upgrades the corresponding software using the upgrade software included in the reproduced data sequence. System for upgrading the software mounted on the terminal using a printed code image comprising a. The method of claim 1, The code image production system A secret key generator for generating the secret key; An encryption unit for encrypting the data string using the secret key generated by the secret key generation unit to generate corresponding encrypted data, and transferring the secret key to the authentication server; And Code image production unit for producing a code image printed with a code image corresponding to the serial number transmitted from the authentication server and the encrypted data generated by the encryption unit System for upgrading the software mounted on the terminal using a printed code image comprising a. The method of claim 2, The code image production unit A compression processor that compresses the serial number and encrypted data; An error correction code processor for performing error correction code processing on the data compressed by the compression processor; An interleaving processing unit which performs an interleaving process on the data subjected to the error correction code processing by the error correction code processing unit; A data adding unit which adds a block address, an error discrimination determination code for an address, a marker, and the like to data output from the interleaving processing unit; A modulator for generating code image data for modulating data output from the adder; And A print output unit which prints a code image corresponding to the code image data generated by the modulator on a specific print medium to produce a code image print System for upgrading the software mounted on the terminal using a printed code image comprising a. The method of claim 1, The user terminal A user interface unit which receives a command from a user or displays information such as an operation state to the user; A wireless communication unit performing wireless communication with the authentication server; A code image reproducing unit which reads and reproduces a code image printed on the code image printed matter; And The serial number of the data reproduced through the code image reproducing unit is transmitted to the authentication server through the wireless communication unit, and when the secret key corresponding to the serial number is received from the authentication server through the wireless communication unit, the secret key is transmitted. A control unit for decrypting encrypted data in the reproduced data, and performing upgrade of the corresponding software using upgrade software data in the decrypted data. System for upgrading the software mounted on the terminal using a printed code image comprising a. The method according to any one of claims 1 to 4, Using a printed code image including the distinguishing code of the content data that the data string is the terminal upgrade software data, the title of the upgrade software data to be displayed to the user, the expiration date, the upgradeable terminal model, the software version, and the actual upgrade software data. System to upgrade the software mounted on the terminal. The method of claim 5, The control unit displays the title of the upgraded software data to be displayed to the user among the decrypted data to the user through the user interface, and then receives the input of whether to approve the corresponding software upgrade from the user. System that upgrades the software installed on the terminal. The method of claim 1, The code image playback unit A detector which picks up the code image printed on the code image printed matter and outputs the image as corresponding image data; A scanning converter which recognizes the captured image data output by the detector as a code image image, normalizes it, and outputs it as binary data; A data string adjusting section for adjusting a string of binary data output from the scan converting section and performing demodulation processing and deinterleaving processing; An error correcting unit correcting an error of data output from the data string adjusting unit; A decompression unit decompressing data output from the error correction unit; And Decryption unit for decrypting the encrypted data of the data output from the decompression unit using the secret key received from the authentication server System for upgrading the software mounted on the terminal using a printed code image comprising a. In the authentication method when upgrading the software mounted on the wireless terminal using the printed code image, a) receiving a secret key used to encrypt the upgrade software from a code image production system that prints the upgrade software to a corresponding code image; b) generating a serial number corresponding to the received secret key and delivering the serial number to the code image production system, such that the serial number is printed with a code image corresponding to the upgrade software in the code image production system; c) receiving a code image printout of the upgrade software and the serial number and receiving the serial number through wireless communication from a user terminal reading the serial number; And d) if the serial number received in step c) is correct, transmit a secret key corresponding to the serial number to the user terminal through wireless communication, and use the transmitted secret key in the user terminal to upgrade the upgrade software. To allow the backup to be restored Authentication method comprising a.