JP2007018645A - Data outflow prevention cd label - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a data outflow prevention CD label which easily prevents data outflow in disposing of the CD. <P>SOLUTION: The CD label 1 is stuck to a data recording surface (label side) of the CD 2 and is embedded with an IC tag 3 near a central hole a. A pair of right and left excess pieces b are projected on the inner side of the central hole a. Also, a weakening line 13, such as a perforated line, concentrical with the central hole a is put at a boundary between an inner peripheral part 11 corresponding to a TOC area and an outer peripheral part 12 corresponding to a data area. The encrypted data Cd is recorded to the IC tag 3 and a secret key Ks for decoding the data Cd and an ID for recognition of the CD 2 are recorded in the IC tag 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In the present invention, when discarding an optical disc (hereinafter referred to as a CD) such as a CD-ROM, a CD-R, a CD-R / W, a DVD-R, and a DVD-R / W, recorded data flows out to the outside. The present invention relates to a data outflow prevention CD label that makes reading of data substantially impossible because of unauthorized use.

In recent years, the cause of leakage of personal information, which has become a social problem, is often leaked from CDs discarded by PC users.
As countermeasures for this, there are a method of erasing data recorded on a CD in software and a method of physically destroying the data.
Even if the data recorded on the CD is erased in software by “deletion” or “format”, the data just appears to disappear, and in fact, it can be read by using special software.
For this reason, there is a method of overwriting and erasing dummy data, but this is a troublesome operation requiring a long time.

When the data recorded on a CD is physically destroyed, the surface of the CD is usually scratched with scissors or a knife so that the data cannot be read, but the reliability is low and it is not suitable for disposal of a large amount of CD. .
There is also a method of folding or crushing a CD, but it takes time and money, and recycling becomes difficult.

  The problems to be solved are as described above, and the present invention has been made for the purpose of providing a data outflow prevention CD label for easily preventing data outflow when a CD is discarded.

  Therefore, the main feature of the present invention is that the data recording surface of the CD is affixed integrally with the protective layer, and when peeled, the protective layer is destroyed and data reading becomes impossible.

  According to the present invention, since the protective layer is destroyed and the data cannot be read when it is peeled off, it is possible to prevent the data from being leaked when the CD is discarded by a simple operation without taking time and cost.

  Embodiments of the present invention will be described below.

1 and 2 are a plan view and an exploded perspective view of a CD label and CD embodying the present invention.
The CD label 1 is affixed to the data recording surface (label side) of the CD 2, the IC tag 3 is embedded in the vicinity of the center hole a, and a pair of left and right excess pieces b are projected inside the center hole a.
In this way, the IC tag 3 is brought as close to the center of the circle as possible, and the surplus pieces b are arranged symmetrically to prevent the core blurring.
In addition, a weakening line 13 such as a perforation that is concentric with the center hole a is provided at the boundary between the inner peripheral portion 11 corresponding to the TOC region and the outer peripheral portion 12 corresponding to the data region.
The encrypted data Cd is recorded on CD2, and the secret key Ks for decrypting the data Cd and the ID for recognizing CD2 are recorded on the IC tag 3.
The IC tag 3 includes a type in which an antenna is built in a chip and a type in which an antenna is externally attached. Any type may be used.

FIG. 3 shows a configuration diagram of a data processing apparatus for a CD embodying the present invention.
The data processing apparatus is provided with a reader / writer 5 and a CD drive 6 on a personal computer 4, and holds an IC tag 3 over the reader / writer 5 to read an ID and a secret key Ks, and sets CD2 in the CD drive 6 to be encrypted. Read the data Cd.
Alternatively, the secret key Ks is written by holding the IC tag 3 over the reader / writer 5, the CD 2 is set in the CD drive 6, and the encrypted data Cd is written.
The reader / writer 5 can also be built in the CD drive 6. In this case, the CD 2 can be set in the CD drive 6 and the IC tag 3 and the CD 2 can be accessed simultaneously.

FIG. 4 shows a flowchart of a CD writing process embodying the present invention.
First, the data Md to be recorded on the CD 2 is encrypted with the secret key Ks and translated into ciphertext data Cd (step 101).
Next, the secret key Ks is written into the IC tag 3 via the reader / writer 5 (step 102).
Next, the ciphertext data Cd is written to the CD 2 via the CD drive 6 (step 103).

FIG. 5 shows a flowchart of a CD reading process embodying the present invention.
First, the ID of the IC tag 3 and the secret key Ks are read via the reader / writer 5 (step 201).
Next, if the validity of the ID is recognized and the result is OK, the process proceeds to step 203, and if it is NG, an error is displayed on the screen of the personal computer 4 and the process is terminated (step 202).
Next, the data Cd of CD2 is read through the CD drive 6 (step 203).
Next, the data Cd is decrypted with the secret key Ks to restore the plaintext data Md (step 204).

The data outflow prevention CD label embodying the present invention is configured as described above. When discarding the CD2, the excess label b is picked with a finger and the CD label 1 is peeled off from the CD2.
As a result, the metal protective layer and the reflective layer of the inner peripheral portion 11 are integrally separated from the resin substrate with the weakening line 13 as a boundary, and the TOC region is destroyed.
When the CD drive 6 recognizes the CD2, the TOC area must be read first. Therefore, if the TOC area is destroyed, the CD2 cannot be recognized.
As a result, the CD 2 cannot be read by the general CD drive 6.
Further, since the CD 2 and the IC tag 3 are separated and discarded separately, the ciphertext data Cd cannot be decrypted with the secret key Ks.
In addition, since there is a risk that the recorded data can be read by a special method only by destroying the TOC area, when destroying all the data, the CD label 1 without the weakening line 13 is pasted and peeled off from the CD 2 The data area is destroyed together with the TOC area.

It is a top view of CD label and CD which implemented this invention. FIG. 2 is an exploded perspective view of FIG. 1. It is a block diagram of the data processing apparatus of CD which implemented this invention. 4 is a flowchart of a CD writing process embodying the present invention. It is a flowchart of the reading process of CD which implemented this invention.

Explanation of symbols

1 CD label 11 Inner circumference 12 Outer circumference 13 Weak line 2 CD
3 IC tag 4 PC 5 Reader / writer 6 CD drive a Center hole b Surplus piece

Claims (7)

Affixed to the data recording surface of the CD together with the protective layer,
A data leakage prevention CD label characterized in that when peeled, the protective layer is destroyed and data reading becomes impossible. Built-in IC tag,
Affixed to the data recording surface of the CD together with the protective layer,
A data leakage prevention CD label characterized in that when peeled, the protective layer is destroyed and data reading becomes impossible.   3. The data outflow prevention CD label according to claim 2, wherein the IC tag is embedded in the vicinity of the center hole of the CD. A secret key is recorded on the IC tag,
3. The data outflow prevention CD label according to claim 2, wherein the data encrypted with the secret key is recorded on the CD.   3. The data outflow prevention CD label according to claim 1, wherein an excess piece is projected inside the center hole of the CD.   6. The data outflow prevention CD label according to claim 5, wherein the surplus pieces are arranged symmetrically. 3. The data leakage prevention according to claim 1, wherein a weakening line concentric with the center hole is provided at a boundary between an inner periphery corresponding to the TOC area of the CD and an outer periphery corresponding to the data area. CD label.

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