KR100365256B1 - Method for the encryption and verification of control code data, and the remotecontroller system therefor - Google Patents

Abstract

The present invention relates to a data encryption method which prevents duplication of data due to impure intention by encrypting and transmitting data. The method of the present invention computes the data to be encrypted to an operation value according to an operation operation selected by a specific registration code, and descrambles the data to generate encrypted data.

In addition, the present invention encrypts the control code data from the remote control using the above-described method and transmits the control code data to the main device, the control code transmitted from the remote control by encrypting the control code data encrypted in the main device in the same manner as that performed on the remote control A remote control system for authenticating code data is disclosed.

Therefore, by using the present invention in a place where security is required, it is possible to prevent damage to the copying of control code data of an intentional purpose in advance.

Description

TECHNICAL FOR THE ENCRYPTION AND VERIFICATION OF CONTROL CODE DATA, AND THE REMOTECONTROLLER SYSTEM THEREFOR}

The present invention relates to a remote control system, and more particularly, to a method of encrypting and transmitting control code data generated by a remote control data transmission apparatus, and to decrypt control code data encrypted by a main apparatus, and a remote control system using the same. .

As is well known in the art, a remote control system is used in a manner of controlling a main device by transmitting a control code from a remote control device through wireless data communication using radio frequency or infrared (IR). This control method is usually fixed to control the main unit by transmitting a data format consisting of four parts: header, status code, data and check sum. The code method is mainly used.

However, the fixed code method has a disadvantage in that there is a high possibility that it is duplicated to those with impure intentions from the outside.

In order to prevent this, a method of transmitting control code data generated by a remote controller using two-way communication has been proposed. In this method, data is sent and received in both directions according to a rule defined by a transmitting side and a receiving side. For example, the data encoded and transmitted by the transmitting side in a quiz method is decoded on the receiving side and transmitted back to the transmitting side to ensure consistency of data. Data communication is performed by checking.

However, since this quiz method is always performed according to a predetermined rule, the encoding and decoding process, there is a problem that there is a fear that the control code is duplicated when this rule is exposed.

Another way to prevent duplication of control codes generated in the remote control is to roll a code that is not reused. The rolling code generated by the rolling method is generated by incrementing or decrementing it to a constant value and is not reused when the rolling code is the same as the previously used code. In this scheme, the transmitting side attaches a variable rolling code to the custom code and transmits it to the receiving side, and the receiving side determines whether the generated rolling code matches the rolling code transmitted from the transmitting side and whether the control code is duplicated. Judge.

However, the above-described rolling method also has a problem in that it cannot be a powerful protection method when a certain increment or change in change is leaked.

Therefore, an object of the present invention is to provide a method for encrypting data such that it is impossible to duplicate to a person with an external impure intention.

Another object of the present invention is to provide a method and system for encrypting and transmitting remote control data at a transmitting side and authenticating encrypted remote control data at a receiving side.

According to one embodiment of the present invention for achieving the above object, there is provided a method for encrypting data, the method comprising: registering a plurality of operation operations and a plurality of operation values to be used in the operation operation in a look-up table memory Making a step; Generating a registration code of a preset length for encryption of the data and setting registration in a registration code storage memory, the registration code having first and second private codes; Generating first random data and first counter data as the data to be encrypted; Selecting an operation operation and an operation value associated with the first private code from the lookup table memory; Generating encrypted second random data from the first random data by calculating the first random data and the selected operation value according to the selected operation operation; Respectively selecting an operation operation and an operation value associated with the second private code from the lookup table memory; The first counter data and the selected operation value are calculated according to the selected operation to generate encrypted second counter data from the first counter data, thereby generating the first and second random data and the first and second data. Generating as a series of encrypted data consisting of counter data.

According to another embodiment of the present invention, in order to prevent duplication of control code data generated in a transmitting apparatus, the control code data is encrypted and transmitted, and the transmitted encryption control code in a receiving apparatus controlled by the control code data. A method of decrypting data is provided, and the method comprises: storing, at the transmitting apparatus and the receiving apparatus, a lookup table in which arithmetic values and arithmetic operations to which the control code data is encrypted are stored in a lookup table memory, respectively. ; Storing a registration code of a preset length for encryption of the control code data in a registration code storage memory, the registration code having first and second private codes; Providing a copy of the registration code to the receiving device; Generating first random data and first counter data as the data to be encrypted; Selecting an operation operation and an operation value associated with the first private code from the lookup table memory; Generating the second random data converted from the first random data by calculating the operation value to the first random data according to a calculation operation selected by the first private code; Selecting an operation operation and an operation value associated with the second private code from the lookup table memory; Generating the second counter data converted from the first counter data by calculating the operation value to the first counter data according to the operation selected by the second private code; Transmitting the first and second random data and the first and second counter data to the receiving device in a format of a series of cryptographic control code data; Receiving, at the receiving device, cryptographic control code data transmitted from the transmitting device; Using the first and second private codes of the registration code provided from the transmitting device and the lookup table, the first random data and the first counter data of the encryption control code data received from the transmitting device and the receiving device; Encrypting in the same manner to generate second random data and second counter data; Authenticating the transmitted encryption control code data by comparing whether the generated second random data and the second counter data are the same as the second random data and the second counter data received from the transmitting apparatus. It is done.

According to another embodiment of the present invention, there is provided a remote control system comprising a remote control and a main device using the above-described encryption method. In the remote control system of the present invention, the remote control includes: a first registration code storage unit storing a registration code having first and second private codes; A first lookup table storage unit in which a plurality of operation values and logical operation operations are mapped and stored; A key operation unit comprising one registration key and a plurality of operation control keys; In response to the selection of the registration key, providing a registration code stored in the registration code storage to the main device, and generating a series of cipher control code data provided to the main device according to selection of each operation control key. A first control unit; The cryptographic control code data includes first random data, first counter data, second random data converted from the first random data, second counter data converted from the first counter data, and an operation control code. The second random data is generated by calculating an operation value corresponding to the first random data from the first lookup table storage unit according to an operation associated with the first private code, and the second counter data is generated by the first lookup table storage unit. An arithmetic value corresponding to the arithmetic operation associated with the second private code is generated by operation on the first counter data from a first lookup table memory; Modulating means for modulating cryptographic control code data generated by said first control unit and transmitting it wirelessly to said main device;

The main apparatus includes: a second registration code storage unit storing a registration code of a copy provided from the remote controller; A second lookup table storage unit configured to map a plurality of arithmetic values and logical operation operations identical to those of the remote controller; Demodulation means for demodulating cryptographic control code data transmitted from said remote control; And a second control unit for encrypting the first random data and the first counter data of the demodulated encryption code data using the registration code of the copy in the same manner as that of the remote controller.

1 is a block diagram of a remote control system composed of a transmitter and a receiver according to the present invention;

2A, 2B and 2C show the format of the control code data stream transmitted from the transmitting apparatus to the receiving apparatus in FIGS.

3 is a diagram illustrating a configuration of a look-up table in which an encryption code and an operation operation designated by a private code of the present invention are recorded;

4A to 4E are diagrams showing a configuration example of control code data for explaining an encryption and decryption process;

5 is a flowchart for explaining an encryption operation performed in the transmitting apparatus of the present invention;

6 is a flowchart for explaining a decoding operation performed in the receiving device of the present invention.

<Description of the symbols for the main parts of the drawings>

100: remote control data transmission device 200: receiving device

122, 222: Registration code storage unit 124, 224: Lookup table

180: RF modulator 280: RF demodulator

Hereinafter, with reference to the accompanying drawings will be described in detail the operation of the preferred embodiment according to the present invention.

Referring to Fig. 1, a block diagram of a remote control system composed of a remote control data transmission device configured according to the present invention and a main device for receiving remote control data is shown.

The transmitter 100 includes a key matrix 110, a first storage unit 120, a second storage unit 140, a control unit 160, and an RF transmitter unit 180, and the main apparatus 200 includes an RF receiver unit. 280, a first storage unit 220, a second storage unit 240, a controller 260, and a driver 290.

The transmitting device 100 according to the present invention includes a remote controller that generates a series of control code data streams related to the control of the main device 200 and provides the generated series of control code data streams to the main device 200. . 2A and 2B show the format of the control code data stream transmitted from the transmitting device 100 used in the present invention to the main device 200 in detail.

As shown in Figs. 2A and 2B, the control code data stream consists of a 10 ms sync pulse (SYNC) frame and a 152 ms data frame, and the data frame is an 8-bit (or 1 byte) long START code. 32-bit (or 8-byte) long ID code, 128-bit (or 16-byte) long encrypted code (ENCRYPTION DATA), 8-bit (or 1-byte) long operation code, and 8-bit (or 1-byte) long It consists of a CHECK-SUM code.

In FIG. 2B, the encryption data is the first random data RANDOM1, the second random data RANDOM2, the first counter data COUNTER1, and the second counter data in units of 4 bytes, as described in detail with reference to FIG. 4B. It is composed of (COUNTER2).

In the present invention, the first random data RANDOM1 is generated at a random value using a random data generator programmed internally by the controller 160, and the first counter data COUNTER1 is configured to generate a clock of the controller 160. Generated as a counter value or timer value. In addition, the second random data RANDOM2 is data encrypted from the first random data RANDOM1, and the second counter data COUNTER2 is data encrypted from the first counter data COUNTER1.

In addition, according to the present invention, each time the transmission device 100 transmits the control code data stream from the transmitting device 100 to the main device 200, the first random data RANDOM1 is generated with a new random value each time, while the first counter data COUNTER1 is generated. ) Is updated each time with the current value plus a constant, +133 (decimal).

Referring back to FIG. 1, the first storage unit 120 may be configured as an EEPROM, which is a nonvolatile memory, and includes a lookup table storage unit 124 referred to for encoding control code data. As illustrated in detail in FIG. 3, the lookup table storage unit 124 sets arithmetic operations and arithmetic values used to encrypt control code data, and byte values in nibble units for selecting arithmetic operations and arithmetic values. The encrypted lookup table is stored.

In addition, the first storage unit 120 further includes a registration code storage unit 122 storing a registration code having a preset byte length as illustrated in FIG. 2C. The registration code stored in the registration code storage 122 is a code used to encrypt the control code data, and is set to a different code value for each system at the time of manufacture of the system. The copy of the registration code is configured in the data format shown in FIG. 2 in the transmitting device 100 to be used as a contracted code for performing encryption and decryption between the transmitting device 100 and the main device 200. The main device 200 is transmitted and stored.

The registration code is the same as the data format of FIGS. 2A and 2B, as illustrated in FIG. 2C, and has an 8-bit (or 1 byte) long START code and a 32-bit (or 8 byte) ID code. , 64-bit (or 8 bytes) long MAPPING code, 64-bit (or 8 bytes) PRIVATE code, 8-bit (or 1 byte) key code, and 8-bit (or 1 byte) And a check-sum code of length). In addition, the private code PRIVATE includes a first private code PRIVATE1 and a second private code PRIVATE2 having a 4-byte length.

The ID code is set to a different code value for each system and used as a code for authenticating the transmitting device 100 and the main device 200 with each other.

The first and second private codes PRIVATE1 and PRIVATE2 may include the first random data RANDOM1 and the first counter data COUNTER1 in the control code data illustrated in FIGS. 2B and 4B. By selecting and encrypting the calculation operation set in the lookup table 124 and the operation value to be used for the calculation operation, the second random data RANDOM2 and the second counter data COUNTER2 are generated.

The mapping code MAPPING is used to scramble the data frame encrypted by the private codes PRIVATE1 and PRIVATE2.

The second storage unit 140, which may be configured as a RAM such as a volatile memory, stores control code data for temporarily storing control code data generated by the controller 160 according to an operation selection button 112 selected by a user. Used as wealth.

In the transmitting device 100, the key matrix 110 has a plurality of operation selection buttons 112 and a registration button 114. Each operation selection button 112 is used as a button selected by a user to remotely control the driver 290 in the main device 200. The command code corresponding to the button selected by the user is transmitted as the operation control code illustrated in FIG. 2B.

The registration button 114 is used to perform the following registration operation before starting the operation to initially control the main device 200 by the transmitting device 100. When the registration button 114 is selected and pressed by the user, a copy of the registration code stored in the registration code storage unit 124 is configured in the data format illustrated in FIG. 2C and transmitted to the transmission device 200 side, thereby transmitting a transmission device ( 100 and the main device 200 to share the registration code with each other. The registration process of the registration code made by the registration button 114 described above is performed once each time the remote control system of the present invention is first installed and used, or a new setting of the remote control system is used.

The controller 160 initially registers the registration code stored in the registration code storage 122 of the EEPROM 120 in the registration process of starting the operation of controlling the main device 200 by the transmitting device 100. 200 to be used to decrypt the encrypted, scrambled and transmitted data stream from the transmitting device 100. This registration code is stored in the registration code storage unit 222 of the main device 200 as in the transmission device 100. In addition, the controller 160 generates data to be encrypted during transmission of a control code for controlling the main apparatus 200, encrypts and scrambles the generated data, and provides the generated data to the transmitting apparatus 200.

The RF transmitter 180 modulates the data frame encrypted and scrambled by the controller 160 using a conventional modulation method, for example, an ASK modulation method, and transmits the data frame to the main device 200 through a wireless channel.

A process of generating final control data by encryption and scramble performed by the controller 160 will be described in detail as follows with reference to the flowchart of FIG. 5. In this regard, it is assumed in the lookup table 124 that arithmetic operations and arithmetic values in nibble units are set as illustrated in FIG. 3, and a registration code is set to code values in nibble units illustrated in FIG. 4A.

First, in step 510, the controller 160 generates the first random data RANDOM1 and the first counter data COUNTER1 having a 4-byte length as illustrated in FIG. 4B as data to be encrypted. In FIG. 4B, the first random data RANDOM1 has, for example, a value of nibble unit byte '23 AB 80 93 (hexadecimal) ', and the first counter data COUNTER1 is, for example, nibble unit byte' A7 23 '. 90 CD (Hexadecimal) ', where 0, 1, 2, 3,. . . , D, E and F shall be indicative of the position of the nibble unit byte for the purpose of explanation.

In operation 520, the controller 160 encrypts the first random data RANDOM1 with reference to the first private code PRIVATE1 and the lookup table 124 of the registration code. do.

Currently, the first private code PRIVATE1 in the registration code is set to the nibble unit byte 'A7 23 90 CD (hexadecimal)' (see Fig. 4A). This code PRIVATE1 is used to select the corresponding operation operation and operation value from the lookup table 124. That is, according to the upper and lower nibble byte values 'A7' of the first nibble unit byte of the first private code PRIVATE1, corresponding Ax and x7 values are designated in the lookup table 124, and an operation associated with the specified value is specified. The operation 'ADC → AND → SBC → COM' and the encryption code value '17 37 11 53 (hexadecimal) 'are selected respectively.

Next, the operation operation 'ADC → AND → SBC → COM' in which the first random data RANDOM1 '23 AB 80 93 (hexadecimal) 'and the operation value '17 37 11 53 (hexadecimal)' of the selected nibble byte are selected. Are computed sequentially. The calculated result is temporarily stored in the second storage unit 140 as the second random data RANDOM2 of the control code data.

The second nibble byte value '23' of the first private code PRIVATE1 again specifies the corresponding 2x and x3 byte positions in the lookup table 124, and the operation operation ' ADC → DECS → XOR → ADC and the nibble byte value '73 23 91 13 (hexadecimal) 'are selected respectively. The selected arithmetic value '73 23 91 13 'is calculated with the values of the second random data RANDOM2 temporarily stored in the second storage unit 140 sequentially according to the selected arithmetic operation' ADC → DECS → XOR → ADC '. It is updated as new second random data RANDOM2.

Again, 9x and x0 byte positions are specified in the lookup table 124 by the third nibble byte '90' of the first private code PRIVATE1, and the associated operation operation 'OR → XOR → RRC → ADC' is associated with this. And the operation value '03 19 13 21 'is selected. The selected operation value '03 19 13 21 'is sequentially calculated with the second random data RANDOM2 value of the second storage unit 140 according to the selected operation operation' OR → XOR → RRC → ADC ', thereby providing a new second value. It is updated as random data RANDOM2.

Similarly, Cx and xD byte positions are specified in the lookup table 124 by the last fourth nibble byte 'CD' of the first private code PRIVATE1, and its operation operations 'AND → ADC → XOR → SBC' and The operation value '20 39 18 50 (hexadecimal) 'is selected. The operation value '20 39 18 50' is selected according to the selected operation operation 'AND → ADC → XOR → SBC' of the second storage unit 140. It is computed sequentially with the second random data RANDOM value.

The second random data RANDOM2 finally updated is generated through the above-described process (step 530). In FIG. 4B, for the sake of simplicity, the second random data RANDOM2 is encrypted from '23 AB 80 93 'which is the first random data RANDOM1. It is represented by the value '(23) (AB) (80) (93)'.

Next, in step 540, an encryption process of the first counter data COUNTER1 is performed. The first counter data COUNTER1 is the same as the encryption method of the first random data RANDOM1 described in steps 520 and 530. In the same way it is encrypted by the second private code PRIVATE2 of the registration code.

At this time, the finally updated second counter data (COUNTER2) is temporarily stored in the second storage unit 140 (550), and in Fig. 4b '(A7) (24) (90) (CD ) '

In the above description, although encryption of the random data RANDOM1 has been described first, it should be understood that encryption of the counter data COUNTER1 may be performed first.

Then, the data frame encrypted through the above-described process is scrambled by the mapping code in the registration code as follows (step 560).

Currently, an 8-byte long mapping code (MAPPING CODE) of a registration code is set to '14 AB 80 93 FD C5 76 2E 'as a nibble unit. Here, each nibble byte value of the MAPPING CODE designates an arrangement order of each nibble unit byte of the data frame, that is, replaces the position and generates the scrambled control code data.

In more detail, the zero ('0') byte value '23' of the encrypted control data frame is the first digit of the encrypted data frame according to the most significant nibble byte '1' value of the MAPPING CODE. The first byte value 'AB' of the moved and encrypted data frame is placed in the fourth position of the encrypted data frame according to the nibble byte '4' value of the mapping code, and the encrypted data frame The second byte value of '80' is scrambled in such a way that it is placed in the 'A' position of the encrypted data frame according to the nibble byte 'A' of the MAPPING CODE, and the last 'F' byte The value '(CD)' is placed in the 'E' position of the encrypted data frame according to the value of the last nibble byte 'E' of the MAPPING CODE. Thus, as illustrated in FIG. 5B, the control code of the finally scrambled data frame is generated from the encrypted data frame and temporarily stored in the second storage 140.

The encrypted and scrambled control code data frame temporarily stored in the second storage unit 140 is combined with an operation code and an ID code generated by selection of the operation selection button 112 of the key matrix 110 by the user, Modulated by the RF transmitter 180 and transmitted to the main device 200 through the wireless channel in the form of the data format illustrated in FIG. 2 (step 570).

On the other hand, the main apparatus 200 has a configuration generally with the transmitting apparatus 100, except that the main apparatus 200 further includes a driver 290 controlled by the control code transmitted from the transmitting apparatus 100.

Accordingly, in the main device 200, the registration code stored in the registration code storage unit 222 of the first storage unit 220 is transmitted from the transmission device 100 by the operation of the registration button 114 of the transmission device 100. A copy of the code is stored, and the lookup table 124 stores the same encryption code value and arithmetic operation as the lookup table 114 of the transmitting device 100.

The control unit 260 performs an operation opposite to that performed by the transmitting apparatus 100 by using the registration code stored in the registration code storage unit 222, the encryption code value stored in the lookup table 124, and an operation operation. Extract the code.

The descramble operation and the decoding operation performed in the main device 200 are described as follows with reference to the flowchart of FIG. 6.

First, in step 610, the RF receiving unit 280 of the main device 200 demodulates the control code data stream transmitted from the transmitting device 100, and provides the demodulated data stream to the controller 260. FIG. 4D illustrates a data stream of the control code received by the main device 200 and temporarily stored in the control code data storage 240.

In the next step 620, the control unit 260 descrambles the data stream received from the transmitting device 100 using the mapping code (MAPPING CODE) of the registration code stored in the registration code storage unit 222. Unlike the scramble method, the descrambling method proceeds by obtaining a code value at a position corresponding to each byte value of the mapping code. For example, the '1' first byte value '23' of the scrambled data stream received from the transmitting apparatus 100 according to the mapping code '14 AB 80 93 'in the registration code storage unit 222 is' 0'. The reverse placement operation is performed on all the scrambled control code data frames in such a way that the position and the '4' fourth byte value 'AB' are placed in the '2' second position. The result is shown in FIG. 4E.

Then, the controller 260 uses the first and second private codes PRIVATE1 and PRIVATE2 and the lookup table 224 for the descrambled control code data frame illustrated in FIG. 4E to display the first random data RANDOM1. ) And the first counter data COUNTER1 are encrypted in the same manner as those performed by the transmitting apparatus 100 (step 630).

Thereafter, the second random data and the second counter data generated as a result of encryption on the transmitting apparatus 200 side are transmitted from the transmitting apparatus 100 and the second random data RANDOM2 and the second counter data COUNTER2. Compare the same (step 640).

As a result of the comparison, if the two codes do not match, the transmitting apparatus 100 recognizes that an error has occurred during transmission, requests for retransmission, or terminates this process.

However, if the two codes match each other as a result of the comparison, the control code data transmitted from the transmitting apparatus 100 is authenticated as being properly transmitted without any hacking or duplication (step 750), and the operation code is extracted from the data stream of the control code. An operation of controlling the driver 290 is performed (step 760).

As described above, according to the present invention, by encrypting the control code data generated in the remote control, copying due to impure intention can be prevented at the source. More reliable countermeasures may be provided when the method of the present invention is used in places that require confidentiality and security, such as bank vaults, precious metal vaults, and the like.

Claims (14)

In a method of encrypting data, Setting and registering a plurality of arithmetic operations and a plurality of arithmetic values to be used in the arithmetic operations in a lookup table memory; Generating a registration code of a preset length for encryption of the data and setting registration in a registration code storage memory, the registration code having first and second private codes; Generating first random data and first counter data as the data to be encrypted; Selecting an operation operation and an operation value associated with the first private code from the lookup table memory; Generating encrypted second random data from the first random data by calculating the first random data and the selected operation value according to the selected operation operation; Respectively selecting an operation operation and an operation value associated with the second private code from the lookup table memory; The first counter data and the selected operation value are calculated according to the selected operation to generate encrypted second counter data from the first counter data, thereby generating the first and second random data and the first and second data. Generating as a series of encrypted data consisting of counter data. The method of claim 1, The registration code further comprises a mapping code; The method is: And scrambled the encrypted data by the mapping code. A method of encrypting and transmitting the control code data to prevent duplication of control code data generated at a transmitting device, and authenticating the transmitted control code data at a receiving device controlled by the control code data. Storing, at the transmitting device and the receiving device, a calculation table used to encrypt the control code data and a lookup table to which a calculation operation is committed, respectively, in a lookup table memory; Storing a registration code of a preset length for encryption of the control code data in a registration code storage memory, the registration code having first and second private codes; Providing a copy of the registration code to the receiving device; Generating first random data and first counter data as the data to be encrypted; Selecting an operation operation and an operation value associated with the first private code from the lookup table memory; Generating the second random data converted from the first random data by calculating the operation value to the first random data according to a calculation operation selected by the first private code; Selecting an operation operation and an operation value associated with the second private code from the lookup table memory; Generating the second counter data converted from the first counter data by calculating the operation value to the first counter data according to the operation selected by the second private code; Transmitting the first and second random data and the first and second counter data to the receiving device in a format of a series of cryptographic control code data; Receiving, at the receiving device, cryptographic control code data transmitted from the transmitting device; Using the first and second private codes of the registration code provided from the transmitting device and the lookup table, the first random data and the first counter data of the encryption control code data received from the transmitting device and the receiving device; Encrypting in the same manner to generate second random data and second counter data; Authenticating the transmitted cryptographic control code data by comparing whether the generated second random data and the second counter data are the same as the second random data and the second counter data received from the transmitting apparatus. By Control code data encryption and decryption method. The method of claim 3, wherein In the transmitting device, the transmitting of the encryption control code data comprises modulating the encryption control code data and transmitting it wirelessly; And in the receiving device, receiving the encryption control code data comprises demodulating the encrypted control code data modulated by the transmitting device. The method of claim 3, wherein The registration code further comprises a mapping code; The method is: Scrambled the encryption control code data by the mapping code before the encryption control code data transmitting step in the transmitting device; And in the receiving device, after the step of receiving the encryption control code data, descrambling the encryption control code data transmitted from the transmitting device by using the mapping code. . The method of claim 3, wherein The first random data is randomly generated data each time the encryption control code data is generated by the transmitter, and the first counter data is a counter value or a timer value that counts a clock of the transmitter. Control code data encryption and decryption method characterized in that the set data. The method of claim 6, And the first counter data is variably updated by a predetermined value every time the encryption control code data is generated in the transmitting apparatus. In the remote control system consisting of a remote control and a main unit, The remote control is: A first registration code storage unit for storing a registration code having first and second private codes; A first lookup table storage unit in which a plurality of operation values and logical operation operations are mapped and stored; A key operation unit comprising one registration key and a plurality of operation control keys; In response to the selection of the registration key, providing a registration code stored in the registration code storage to the main device, and generating a series of cipher control code data provided to the main device according to selection of each operation control key. A first control unit; The cryptographic control code data includes first random data, first counter data, second random data converted from the first random data, second counter data converted from the first counter data, and an operation control code. The second random data is generated by calculating an operation value corresponding to the first random data according to an operation associated with the first private code from the first lookup table storage unit, The second counter data is generated by calculating an operation value corresponding to the first counter data according to an operation associated with the second private code from the first lookup table memory; Modulating means for modulating cryptographic control code data generated by said first control unit and transmitting it wirelessly to said main device; The main unit is: A second registration code storage unit for storing a registration code of a copy provided from the remote controller; A second lookup table storage unit configured to map a plurality of arithmetic values and logical operation operations identical to those of the remote controller; Demodulation means for demodulating cryptographic control code data transmitted from said remote control; Encrypting the first random data and the first counter data of the demodulated encryption code data using the registration code of the copy in the same manner as in the remote controller, and the second random data and the second counter data generated by the encryption. And a second control unit for authenticating the transmitted encryption control code data by comparing whether the second random data and the second counter data are identical to each other. The method of claim 8, The registration code further comprises a mapping code; The cryptographic control code data in the remote controller is scrambled by the first control unit according to the mapping code and transmitted to the main device; In the main device, the password control code data transmitted from the remote control is descrambled by the second control unit according to the mapping code of the copy. The method of claim 8, The first random data is randomly generated data whenever the encryption control code data is generated by the remote controller, and the first counter data is a counter value or a timer that counts a clock of a first controller of the remote controller. And a data set as a value. The method of claim 10, And the first counter data is variably updated by a predetermined value every time the encryption control code data generated by the remote controller is transmitted. The method of claim 8, The first and second random data, the first and second counter data, and the first and second private codes each have the same byte length, And the mapping code has the same byte length as the set of first and second private codes. The method of claim 8, The upper byte and the lower byte of each nibble unit of the first and second private codes select a corresponding operation operation and operation value from the lookup table. The method of claim 8, And a byte of each nibble unit of the mapping code indicates an arrangement order of the nibble unit bytes of the first and second random data and the first and second counter data.