KR100282743B1 - Copy protection key and manufacturing method - Google Patents

Abstract

Consists of an insulating material, the main body is formed with a key groove in the middle portion, the conductive portion formed by applying a conductive metal to the first surface of the main body and the conductive portion at non-constant intervals by direct drawing method (laser etching method) Consists of an etched insulator, and the conductive pattern is applied to the second face located opposite to the first face of the main body, a cryptographic pattern that generates a difference in response of the magnetic field due to the combination of the conductive part and the insulator when a magnetic field is applied. The conductive portion formed by the conductive portion and the insulating portion etched at regular intervals by a direct drawing method, the position pattern is induced the response difference of the magnetic field of a certain period when a magnetic field is applied, and the surface of the encryption pattern and the position pattern Disclosed is a copy protection key composed of a matte opaque resin layer applied to a surface to make it difficult to visually identify . The copy protection key has an advantage of preventing duplication by setting various ciphers by calculation of various magnetic field signals generated in the encryption pattern and a constant magnetic field signal generated in the position pattern.

Description

Copy protection key and manufacturing method

The present invention relates to a key that can prevent duplication, and more particularly, by forming a fine pattern in the form of a bar code on the surface of the key, and then applying a matte opaque resin, the identification of the password is impossible to prevent duplication. And to a method for producing the same.

In general, the locking device is composed of a key having a predetermined uneven portion formed on its surface and a lock having unevenness corresponding to the uneven portion of the key. These keys can be easily duplicated by a simple device, and the lock release can be made easily by a simple tool. Therefore, there are many problems in the storage of valuables in each home, as well as in the personal storage of public places used by unspecified majority. In particular, there is a high probability that the same key will be produced due to the limitation of uneven processing. In order to overcome the problem of mechanical processing, an electronic key has been manufactured, which has the advantage that the key cannot be duplicated by inputting a series of numeric combinations into the number plate attached to the lock, but unlocking the lock. In addition to the limitation of the number of ciphers, there are problems for children or the elderly to use.

Another key is to enter personal information into the IC chip and read the personal information by contact and non-contact method using a small terminal to determine whether the lock is unlocked. And equipment is expensive.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a key and a manufacturing method that is impossible to duplicate using a micropattern in the form of a barcode and matte opaque resin coating.

1 is a schematic diagram for explaining membership of an encryption pattern and a location pattern of a copy protection key;

A) is a schematic diagram representing a cryptographic pattern and a cryptographic pattern on which 7-bit ciphers are formed as logical values;

B) is a schematic diagram expressing the position pattern and the position pattern processed in order to give a position to the encryption pattern as logical values.

2 is a schematic diagram of a process for manufacturing a copy protection key of the present invention;

A) is a schematic diagram showing a key before processing;

B) is a schematic diagram showing an encryption pattern and a position pattern formed on the key of A);

C) is a schematic showing the application of a matte opaque resin to the keys formed by B); and

Fig. 3 is a schematic diagram showing a time chart for the logical values represented by each pattern in order to recognize an encryption pattern.

A) is a time chart of logical values represented by an encryption pattern according to an example of the present invention;

B) is a time chart for the logic value indicated by the position pattern; And

C) is a time chart of recognized cryptographic patterns that appear after computing the logical values represented by each pattern.

※ Explanation of codes for main parts of drawing

410: key 420: first metal thin film

422: insulation 424: conduction

426: encryption pattern 430: second metal thin film

432: insulation 434: conduction

436: position pattern 440: key groove

442: First Coating Film 444: Second Coating Film

In order to accomplish the above object, the present invention is made of an insulating material, and a main groove having a key groove formed thereon, a conductive portion formed by applying a conductive metal to the first surface of the main body, and a direct drawing method of the conductive portion (on the laser By means of surface etching method) and a conductive pattern formed by applying conductive metal to a second surface located opposite to the first surface of the main body, and a drawing of the conductive pattern directly Provided are a position pattern composed of insulating portions etched at regular intervals by a method, and a copy preventing key composed of a cryptographic pattern and a matte opaque resin layer applied to the surface of the position pattern.

The conductive body such as copper is deposited on the main body of the key by electroless and electroplating to form a conductive portion. The insulating part is formed by the direct drawing method in the said conductive part, and the encrypted micro pattern is formed. Then, a matte opaque polymer is applied to make the identification of the password impossible. Irradiating a magnetic flux on one side of the key induces a difference in response to the magnetic field applied from the conducting and insulating sections, and detects the formed cryptographic pattern.

The conductive part and the insulated part formed by the direct drawing method become the basic unit of the encryption pattern, and the width is tens of micrometers, and hundreds of basic unit patterns can be processed in the key of the size generally used. Therefore, there is little possibility that the number of ciphers generated by the combination of the conducting portion and the insulating portion increases exponentially, so that a key having the same cipher is produced.

The method of manufacturing the copy protection key includes the steps of: i) forming a conductive part by applying a conductive metal to the first surface of the key body, ii) forming an insulating part by partially etching the conductive part by direct drawing method, thereby forming an encryption pattern. Forming a conductive part by applying a conductive metal film to a second surface formed on the opposite side of the first surface of the main body, and iii) processing the conductive part by a direct drawing method so as to have a constant distance from each other. Forming an insulating portion to form a position pattern, i) applying a matte opaque resin to the surface of the encryption pattern and the position pattern.

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

1) are schematic diagrams for explaining the membership of the encryption pattern and the position pattern of the copy protection key. As shown, a conductive metal is applied to the surface of the key to form the conductive portion 312. The conductive portion 312 is partially etched by a direct drawing method to form an insulating portion 314 having a width of several tens of micrometers. The conductive part 312 and the insulating part 314 are basic units of the encryption pattern 310. When a magnetic field is applied to a key composed of a combination of these basic units, an eddy current is generated in the conductive portion 312 in response to the magnetic field. In addition, the insulator 314 does not generate a response to the applied magnetic field. Therefore, the insulator 314 is insulated from the conducting unit 312 by using a magnetic sensor capable of applying a magnetic field and detecting a difference in response to the applied magnetic field. When the magnetic field difference of the unit 314 is represented in one unit like a digital circuit, the conductive unit 312 is represented by the logic value 1 324 and the insulator 314 is represented by the logic value 0 322.

For example, if the encryption pattern 310 to be formed is a 7-bit form such as 1001101, the form of the 7Bit is inverted as in 0110010 in order to form the encryption pattern. At this time, the portion represented by the logic value 1 324 is the conductive portion 312 not etched, and the portion represented by the logic value 0 322 is the insulation portion 314 etched by the direct drawing method.

Therefore, the conductive part 312 and the insulating part 314 are formed in the order in which the encryption pattern 1001101 is inverted as shown in 0110010. However, since the encryption pattern 310 formed as described above is composed of only a combination of the conductive portion 312 and the insulation portion 314 and does not have information on each position, it is difficult to recognize the encryption pattern 310. There is this.

Therefore, in order to prevent this, it is necessary to form the position pattern 330 which gives the number of digits to the encryption pattern 310. The process of forming the position pattern 330 is the same as the process of forming the encryption pattern 310. That is, by forming a conductive portion 332 by applying a conductive metal on the surface of the key, by partially etching the conductive portion 332 by a direct drawing method, by forming an insulating portion 334 having a width of several tens of micrometers. The position pattern 330 is formed. The plurality of insulation parts 334 of the position pattern 330 maintain the same distance from each other.

When a magnetic field is applied to the position pattern 330, an eddy current is generated in the conductive part 332 in the same principle as the encryption pattern 310. In addition, the insulator 334 does not induce a response to the applied magnetic field. Therefore, the conductive part 332 and the insulator 334 may be separated by using a magnetic sensor capable of detecting a difference in response to the magnetic field. When the magnetic field response difference is expressed in one unit as in a digital circuit, the conductive part 332 becomes the logic value 1 344 and the insulation part 334 is represented by the logic value 0 342.

Fig. 2 is a schematic diagram of a process for producing a copy protection key of the present invention based on the above principle.

FIG. 2A shows a metal thin film applying process for applying a conductive metal thin film to the surface of a key using an organic metal as a medium. As shown, the key 410 is comprised of an insulator. A middle portion of the key 410 is formed with a groove 440 for guiding the key 410 to be correctly inserted into and withdrawn from the lock. The first surface 412 of the key 410 and the second surface 414 opposite to the first surface 412 are coated with a conductive metal by electroless and electroplating to form a thin metal film 420, 430. ). The metal thin films 420 and 430 have a thickness of 10 μm or less.

2B shows a process of forming an encryption pattern and a position pattern. As shown in the drawing, when a laser beam is irradiated onto the first surface 412 of the metal thin film 420, a portion of the metal thin film 420 is removed to form an insulating portion 422. In addition, the conductive part 424 is formed in the portion of the metal thin film 420 not irradiated with the laser beam. The encryption pattern 426 is formed by the combination of the conductive portion 424 and the insulating portion 422. That is, when a magnetic field is applied to the key 410, a magnetic field is generated in the conductive portion 424 by inducing an eddy current, and since no eddy current is induced in the insulating portion 422, no magnetic field is generated. That is, the password is set by the difference between the magnetic fields of the conductive portion 424 and the insulating portion 422.

On the other hand, the metal thin film 430 applied to the second surface 414 is formed with a position pattern 436 to give a digit to the encryption pattern 426. When the laser beam is irradiated onto the metal thin film 430, a part of the metal thin film 430 is removed to form an insulating portion 432. In addition, the conductive part 434 is formed in a portion of the metal thin film 430 to which the laser beam is not irradiated. The position pattern 436 is formed by the combination of the conductive portion 434 and the insulating portion 432. When a magnetic field is applied to the key 410, an eddy current is induced in the conductive portion 434, and a magnetic field is generated. Since no eddy current is induced in the insulation portion 432, no magnetic field is generated. Since the intervals of the plurality of insulation portions 432 are kept constant with each other, the magnetic field generated in the conductive portion 434 also occurs at a constant interval. Accordingly, since the position pattern 436 is a relative reference to the encryption pattern 426, the position pattern 436 may recognize the number of digits of the encryption pattern 426.

FIG. 2C shows a process of applying the matte opaque resin. As shown, after the encryption pattern 426 and the position pattern 436 is processed, a matte opaque resin is coated on the surface of the encryption pattern 426 to make it impossible to visually identify the first coating film 440. . In addition, a matte opaque resin is coated on the surface of the position pattern 436 to form a second coating film 444. The thicknesses of the first and second coating films 442 and 444 are several tens of micrometers.

A, B) and C) of FIG. 3 illustrate the principle of recognizing a password by the encryption pattern 426 (FIG. 2) and the position pattern 436 (FIG. 2). As shown, when the magnetic field response difference induced by the encryption pattern 426 (FIG. 2) is measured and converted into a logical value form, the first time chart 450 for the logical value as shown in FIG. You can get it. In addition, when the reaction difference of the magnetic field generated in the position pattern 436 (FIG. 2) is measured, a second time chart 460 for a logic value as shown in FIG. 3B may be obtained.

When the first and second time charts 450 and 460 are logically operated based on the logical value 0 of the position pattern 436 (FIG. 2), a third time chart 470 such as C) of FIG. 3 may be obtained. That is, if the comparison is made based on the logical value 0 of the second time chart 460 of the position pattern 436 (FIG. 2), it matches the cipher 1001101. Therefore, the lock pattern is unlocked by detecting the encryption pattern of the key by the sensor of the lock and comparing it with the value set in the lock.

According to the present invention, the copy protection key is impossible to identify the password by the finely formed encryption pattern and the resin can not be duplicated the key, there is an advantage that anyone can easily use.

Although the present invention has been described above using embodiments of the present invention, it will be apparent to those skilled in the art that various modifications may be made without departing from the spirit of the present invention.

Claims (3)

A main body made of an insulating material and having a key groove formed at an intermediate portion thereof; Conductive part formed by applying a conductive metal to the first surface of the main body and an insulating part which is etched at non-constant intervals by each other by direct drawing method, by a combination of the conductive part and the insulating part when a magnetic field is applied An encryption pattern in which response differences of various magnetic fields are induced; And Conductive part formed by applying conductive metal to the second surface located opposite to the first surface of the main body and the insulating part which is etched at regular intervals from each other by direct drawing method, and has a constant period when a magnetic field is applied It consists of a position pattern in which the response difference of the magnetic field of Copy protection is prevented by setting various ciphers by calculating a signal due to a response difference of various magnetic fields generated in the encryption pattern and a signal for a magnetic field response difference of a certain period occurring in the position pattern. key. The copy protection key according to claim 1, wherein a matte opaque resin layer is coated on the surfaces of the cryptographic pattern and the position pattern to make it difficult to visually identify. Iv) applying a conductive metal to the first surface of the key body using an organic metal as a medium to form a conductive portion; Ii) forming an insulating part by partially etching the conductive part by direct drawing; Iv) forming a conductive part by applying a conductive metal film to the second surface formed on the opposite side of the first surface of the main body using an organic metal as a medium; Iii) processing the conductive part by direct drawing to form an insulating part to have a predetermined distance from each other to form a position pattern; Iii) applying a matte opaque resin to the surface of the cryptographic pattern and the location pattern.