JPS62280991A - Information storage card - Google Patents

Abstract

PURPOSE:To improve security by providing an optical memory and an IC memory on a same substrate, storing the directory of information stored in the optical memory in the IC memory, scattering information corresponding to one directory in discontinuous address areas and storing said information in the optical memory. CONSTITUTION:The optical memory 1 is formed on the face of an information storage card A and the IC memory 2 is buried on the back. By controlling an IC card contact point signal I/O circuit 36, directory information is read out of the IC memory 2. Based on a consecutively selected directory, a read/ write controller 31 and a tracking controller 25 are controlled to access the optical memory 1. Information is read and written in the optical memory 1. The optical memory 1 is accessed based on the directory by sequentially specifying plural preset random addresses.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] This invention relates to an information storage card in which an optical memory and an IC memory are provided on the same substrate.

[Prior Art] Conventionally, IC memory cards and optical memory cards are known as information storage cards. Since IC memory cards have an internal CPU and ROMSRAM, it is very difficult to decipher the data stored in the RAM, and the security is high, but on the other hand, the storage capacity is not that large at only a few tens of bytes, so the range of use is limited. There is a problem that the number of In addition, optical memory cards have a storage capacity of several megabytes and can be used in a wide range of applications, but because the information storage part is structurally exposed to the outside, it can be easily read from outside, which poses security concerns. There was a problem with the surface.

[Problems to be Solved by the Invention] For these reasons, there has been a desire to develop an information storage card with high security and large storage capacity.

The present invention was made to satisfy these demands, and an object of the present invention is to provide an information storage card that has high security and can sufficiently increase storage capacity.

[Means for Solving the Problems] The present invention provides an optical memory and an IC memory on the same substrate, and stores a directory of information stored in the optical memory on the IC.
Information corresponding to one directory is stored in a memory, and information corresponding to one directory is distributed and stored in non-continuous address areas in an optical memory.

Further, in the present invention, means for encrypting information stored in the optical memory is provided in the IC memory, and the information is stored in the optical memory after being encrypted by the IC memory.

Further, in this invention, a key code for encrypting the information stored in the optical memory is provided in the IC memory, and the information is stored in the optical memory after being encrypted with the key code of the IC memory. .

[Operation] In the present invention having such a configuration, when writing information to the optical memory or reading information from the optical memory, the directory stored in the IC memory is read and the information is read based thereon. When information based on this directory is written to or read from the optical memory, a random address is used.

Further, in the present invention, information is encrypted by an encryption means provided in the IC memory and written to the optical memory.

Furthermore, in the present invention, information is encrypted using a key code set in the IC memory and written to the optical memory.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an information storage card A, with (a) showing the front side and (b) showing the back side.

An optical memory 1 is formed on the front side of the information storage card A, and an IC memory 2 is embedded on the back side.

Figure 2 shows a cross-sectional view along the line ■-■ in Figure 1.
This information storage card A is provided with an optical memory base material 3 approximately in the center thereof, a lower layer member 4 is laminated thereon, a reflective film 5 is coated on the lower layer member 4, and a reflective film 5 is coated on the lower layer member 4. A protective layer 6 is laminated, and a surface hardening film 7 for preventing scratches is formed on the protective layer 6.
is coated to form the surface side.

Further, under the optical memory base material 3, a plastic base material 10 is provided with a hole 9 for embedding the IC memory chip 8.
are laminated, and electrode patterns 11 and 12 are placed under the base material 10.
The back side is formed by laminating an oversheet 13 in which the wafer is embedded.

The IC memory chip 8 is embedded in the hole 9 and fixed to the printed circuit board 14 with an adhesive 15.

FIG. 3 shows a device for writing and reading information to and from the information storage card A. The information storage card A is placed and supported by a card holder 21. As shown in FIG. Then, a modulator 23 transmits the laser light output from the laser oscillator 22 to the optical memory 1 on the information storage card A.
, a focus controller 24 and a tracking controller 25. The reflected light from the optical memory 1 is detected by a photosensor 26, and the detected signal is converted into parallel data via a serial/parallel conversion circuit 27 and output to a data line 28. The data output to this data line 28 is taken in by a microprocessor 29.

Further, a laser detector 30 detects the laser beam outputted through the focus controller 25, and supplies the detection signal to the focus controller 24 and the read/write controller 31. The focus controller 24 controls the degree of aperture of the output laser light based on the detection signal from the laser detector 30.

The microprocessor 29 supplies read or write control data to the read/write controller 31 via the data line 28 and the parallel/serial conversion circuit 32. The read/write controller 31 controls the modulator 23 based on control data from the microprocessor 29 and detection signals from the laser detector 30.

The microprocessor 29 also controls the tracking controller 25, card holder drive circuit 34, and IC card contact drive circuit 35 via a control line 33. The tracking controller 2
5 selectively controls the information storage track in the optical memory 1 of the information storage memory A, and the card holder drive circuit 3
4 controls the movement of the card holder 21 so that the laser beam incident on the optical memory 1 can move on the information storage track. The IC card contact drive circuit 35 controls the contact and separation of the electrode patterns 11 and 12 of the IC memory 2 of the information storage card A with respect to the external electrodes.

Furthermore, the microprocessor 29 controls the IC card contact signal input/output circuit 36 to write and read information into and from the IC memory 2 via external electrodes.

When the microprocessor 29 writes or reads information to or from the information storage card A, it performs the processing shown in FIG. First of all, this is the IC card contact drive circuit 3.
5 to bring the electrode pattern of the IC memory 2 into contact with an external electrode and supply power to the circuit within the IC memory 2. Next, the data set in the IC memory 2 is read and it is checked whether the card is a normal card or not. Next, the separately entered PIN number is checked and a security check is performed. Note that if any abnormality is detected through the above checks, it is treated as an error.

Next, the IC card contact signal input/output circuit 36 is controlled to
Read directory information from C memory 2. This directory is a kind of index. Then, a directory corresponding to the information to be written or the information to be read is selected from the read directory information.

Next, the optical memory 1 is accessed by controlling the read/write controller 31 and the tracking controller 25 based on the selected directory, and information is written to or read from the optical memory 1. In this case, access to the optical memory 1 based on the directory is performed by sequentially specifying a plurality of preset random addresses.

In this embodiment with such a configuration, since information can be written to the optical memory 1, the information storage capacity can be made sufficiently large.

Further, since the directory information for writing information to and reading information from the optical memory 1 is set in the IC memory 2, the directory information cannot be read from the outside. Furthermore, when writing information to the optical memory 1, the area is not set as a continuous address, but is discontinuous as a random address, so even if the contents written in the optical memory 1 are read from the outside, the information has no meaning. Attachment becomes impossible.

In this way, since the address of the information written to the optical memory 1 is random, and the directory information specifying the address is set in the IC memory 2, it is impossible to read information from the optical memory 1. Card security can be increased.

In the above embodiment, the directory information is set when writing information to the optical memory 1 in the IC memory 2 or reading information from the optical memory, but the invention is not necessarily limited to this. For example, the IC memory 2 is provided with a processing means for encrypting information, and when writing information to the optical memory, the information is encrypted and written to the IC memory, and when reading information from the optical memory, the optical memory The information written in the optical memory may be decoded and read out using an IC memory.In this way, the information written in the optical memory becomes encrypted and cannot be read from the outside, making it impossible to read the information from the card. Security can be increased. Also, if you set a key code for encryption in the IC memory and write information to the optical memory, you can read the key code from the IC memory, encrypt the information with that key code, and write it to the optical memory. It is effective.

[Effects of the Invention] As detailed above, according to the present invention, it is possible to provide an information storage card that has high security and can sufficiently increase storage capacity.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a perspective view showing the appearance of the card, Fig. 2 is a cross-sectional view taken along the line ■-■ in Fig. FIG. 4 is a block diagram showing a circuit for writing and reading data, and FIG. 4 is a flowchart showing control by the microprocessor in FIG. A... Information storage card, 1... Optical memory, 2...
・IC memory. Applicant's attorney Takehiko Suzue Figure 1 Figure 2 Figure 4

Claims (3)

[Claims] (1) An optical memory and an IC memory are provided on the same substrate, and the directory of information stored in the optical memory is
C memory, and 1 for the optical memory.
An information storage card characterized in that information corresponding to one directory is distributed and stored in non-continuous address areas. (2) An optical memory and an IC memory are provided on the same substrate, and the directory of information stored in the optical memory is
Information storage characterized in that means for storing the information in the C memory and encrypting the information is provided in the IC memory, and the information is stored in the optical memory after being encrypted by the IC memory. card. (3) An optical memory and an IC memory are provided on the same substrate, and the directory of information stored in the optical memory is
A key code for storing the information in the C memory and encrypting the information is provided in the IC memory, and the information is stored in the optical memory after being encrypted with the key code of the IC memory. Information storage card.