Data processing: financial – business practice – management – or co – Automated electrical financial or business practice or...
Patent
1997-06-09
2000-06-27
Teska, Kevin J.
Data processing: financial, business practice, management, or co
Automated electrical financial or business practice or...
380201, 369272, H04K 100
Patent
active
060817852
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an optical disk, an optical disk system and a cryptocommunication method.
BACKGROUND
In recent years, with the increased use of networks such as the Internet and optical CD ROM disks, network soft key distribution for optical ROM disks has increased. Also, electronic commercial transactions have increased.
Soft key electronic distribution systems for CD-ROM media have been used. In conventional systems, it is known to give passwords and decipher the enciphered soft ciphers recorded on the CD-ROMs in advance. When CD-ROMs are used, however, it is not possible additionally to record on the disks, so that it is not possible to individually set IDs for respective disks. Therefore, one password would release the ciphers of all the disks manufactured from the same original disk. For this reason, when CD-ROMs are used, it is necessary to install the disks' IDs on the hard disks of personal computers, or mail to users IDs prepared centrally.
In electronic distribution systems with conventional optical disks and/or optical disk systems, there is a need to provide the disks and/or systems with IDs and/or cipher keys. It is an object of the present invention to simply provide IDs and cipher keys for ROM disks in electronic distribution systems.
SUMMARY OF THE INVENTION
To achieve the objects of the present invention, the pit portions of optical disks are provided with an additional recording area or Burst Cutting Area (hereinafter abbreviated as BCA) overwritten with a bar code and, when the disks are manufactured, IDs differing for each disk and, according to the need, cipher keys for communication and decoding keys for decoding key cipher texts for communication, are recorded individually in the BCA areas. As a result, when the disks have been distributed to users, the user ID numbers, the cipher keys for transmission for communication, and the decoding keys for reception are distributed automatically to the users. It is therefore possible to omit some of the procedures that complicate conventional systems. Also, cryptocommunication and the identification of disks are made possible at the same time.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a flow chart of an optical disk according to an embodiment of the present invention.
FIGS. 2a-c are cross sections and results of trimming with a pulse laser according to an embodiment of the invention.
FIGS. 3a-g show the signal reproduction waveforms at a trimming portion according to an embodiment of the invention.
FIG. 4 is a block diagram of a reproducer according to an embodiment of the invention.
FIG. 5a shows the waveform of a reproduced signal at a BCA part according to the invention. FIG. 5b shows dimensional relationships of a BCA part according to the invention.
FIG. 6 shows a method of cryptocommunication and a cipher key method by means of a password according to an embodiment of the present invention.
FIGS. 7a-c show the format of a BCA according to the invention.
FIG. 8 shows a method of cryptocommunication and a method of unlocking a cipher with a password according to an embodiment of the invention.
FIG. 9 shows a procedure for operation of a disk, the content part of which may have been licensed, according to an embodiment of the invention.
FIG. 10 is a block diagram of an example wherein a BCA has been recorded in a RAM disk according to an embodiment of the present invention.
FIG. 11 is a block diagram of a method or system for prevention of unauthorized copying according to an embodiment of the invention.
FIG. 12 is a flow chart depicting preventing unauthorized copying according to an embodiment of the invention.
FIG. 13a is a plan view and FIG. 13b is a cross section of an optical disk, on the BCA of which an article or commodity bar code has been printed, according to an embodiment of the invention. FIG. 13c shows a method or producing an optical disk according to an embodiment of the invention.
FIG. 14 is a block diagram of a POS settlement system with a ROM disk having a BCA and a POS termina
REFERENCES:
patent: 5513169 (1996-04-01), Fite et al.
patent: 5761301 (1998-06-01), Oshimal et al.
patent: 5807640 (1998-09-01), Ueno et al.
patent: 5881038 (1999-03-01), Oshima et al.
Gotoh Yoshiho
Koishi Kenji
Moriya Mitsurou
Oshima Mitsuaki
Takemura Yoshinari
Matsushita Electric - Industrial Co., Ltd.
Smith Demetra R.
Teska Kevin J.
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