Source: http://www.google.com/patents/US6885629?dq=6,976,008
Timestamp: 2014-03-08 02:35:33
Document Index: 776311271

Matched Legal Cases: ['art 827', 'art 827', 'art 828', 'art 930', 'art 930', 'art 820', 'art 822', 'art 820', 'art 862', 'art 862']

Patent US6885629 - Recordable optical disk including an auxiliary information presence indicator - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsAn optical disk having a first recording area for recording information; and a second recording area having auxiliary information including disk identification information unique to that optical disk recorded therein, wherein the second recording area including circumferentially arranged multiple stripe...http://www.google.com/patents/US6885629?utm_source=gb-gplus-sharePatent US6885629 - Recordable optical disk including an auxiliary information presence indicatorAdvanced Patent SearchPublication numberUS6885629 B2Publication typeGrantApplication numberUS 09/917,877Publication dateApr 26, 2005Filing dateJul 31, 2001Priority dateOct 9, 1995Fee statusPaidAlso published asCN1152311C, CN1166223A, CN1316490C, CN1474385A, CN1474396A, CN1547200A, CN1547201A, CN100347985C, CN100411041C, CN100414612C, DE69613010D1, DE69613010T2, DE69613011D1, DE69613011T2, DE69613156D1, DE69613156T2, DE69614823D1, DE69614823T2, DE69618672D1, DE69618672T2, DE69620919D1, DE69620919T2, DE69621053D1, DE69621053T2, DE69621357D1, DE69621357T2, DE69634218D1, DE69634218T2, DE69637757D1, EP0802527A1, EP0802527A4, EP0802527B1, EP1005023A1, EP1005023B1, EP1005024A1, EP1005024B1, EP1005025A1, EP1005025B1, EP1005026A1, EP1005026B1, EP1005027A1, EP1005027B1, EP1005028A1, EP1005028B1, EP1024478A1, EP1024478B1, EP1168328A1, EP1168328B1, EP1414034A2, EP1414034A3, EP1414034B1, EP1439534A2, EP1439534A3, US6081785, US6301569, US6343282, US6381588, US6611820, US6622132, US6633853, US6778969, US7127430, US7827111, US20010013023, US20010055132, US20020046177, US20020073038, US20030046245, US20030177098, US20040181488, US20040181489, WO1997014144A1Publication number09917877, 917877, US 6885629 B2, US 6885629B2, US-B2-6885629, US6885629 B2, US6885629B2InventorsMitsuaki Oshima, Yoshiho Gotoh, Shinichi Tanaka, Kenji Koishi, Mitsurou Moriya, Yoshinari TakemuraOriginal AssigneeMatsushita Electric Industrial Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (25), Non-Patent Citations (2), Referenced by (18), Classifications (147), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetRecordable optical disk including an auxiliary information presence indicatorUS 6885629 B2Abstract An optical disk having a first recording area for recording information; and a second recording area having auxiliary information including disk identification information unique to that optical disk recorded therein, wherein the second recording area including circumferentially arranged multiple stripe patterns each strip extending along a radius of the disk; and indicator indicating the presence of auxiliary information.
With reference to FIG. 4, the decoding operation will be-explained. A disk 801 with a BCA includes two transparent substrates, which are laminated with a recording layer 801 a between them. The recording layer may either be a single layer 801 a or include two recording layers 800 a and 800 b. If there are two layers, a BCA flag 922 is recorded in the control data of the first recording layer 800 a, which is adjacent to the optical head 6. The flag 922 indicates whether a BCA is recorded or not. Because a BCA is recorded in the second layer 800 b, the first recording layer 800 a is focused on first, and the optical head 6 is moved to the radial position of the control data 924 in the innermost edge of the second recording area 919. The control data is main data, and has therefore been Eight to Fourteen Modulation (EFM), 8-15 or 8-16 modulated. Only when the BCA flag 922 in the control data is �1�, a single/double layer switching part 827 focuses on the second recording layer 801 b to reproduce the BCA. If the signal is sliced by a level slicer 590 at the general first slice level 915 as shown in FIG. 2 c, it is converted into a digital signal. This signal is demodulated in the first demodulation part by an EFM demodulator 925, an 8-15 modulator-demodulator 926 or an 8-16 modulator-demodulator 927. An ECC decoder 36 corrects errors, if any, and outputs main data. The control data in the main data is reproduced and only if the BCA flag 922 is 1 is the BCA read. When the BCA flag 922 is 1, a CPU 923 orders the single/double layer switching part 827 to drive a focus adjustment part 828, switching the focus from the first recording layer 801 a to the second recording layer 801 b. At the same time, the optical head 6 is moved to the radial position of the second recording area 920, that is, for the DVD standard, the BCA in recorded between 22.3 and 23.5 mm from the inner edge of the control data, Then the BCA is read. Reproduced in the BCA area is a signal with a partially missing envelope as shown in FIG. 2 c. By setting in the second level slicer 929 the second slice level 916 of which the quantity of light is smaller than that of the first slice level 915, it is possible to detect the missing parts of the reflecting portion of the BCA, and a digital signal is output. This signal is PE-RZ demodulated by the second demodulation part 930, and ECC decoded by an ECC decoder 930 b so as to output BCA data, which is auxiliary data. Thus, the first demodulator 928, operative according to, 8-16 modulation demodulates and reproduces the main data, while the second demodulation part 930 operative according to PE-RZ modulation demodulates and reproduces the auxiliary data, that is, the BCA data.
In a user's first computer 909, if a reproducer 819 reproduces a distributed disk 801 with a BCA, a BCA reproduction part 820 including a PR-RZ demodulation part reproduces the data of the ID 815, first cipher key 816, second cipher key 817 and/or connection address 818. In order to get a password, the connection address 818 of the second computer 821 a, which is the server of a password issue center 821, is accessed through a communication part 822 via the Internet or another network 823, and the ID is transmitted to the second computer 821 a. Here, the cryptocommunication procedure will be described. The second computer 821 a receives the ID 815 from the user's reproducer 819. Then, the second computer or server 821 a of the password issue center 821, which is called a �mall� or an �electronic shop� has a cipher key database 824. This database contains a table of the secret keys which are the decoding keys corresponding to the disks' own IDs or the first cipher keys 816 of the IDs, that is the first decoding keys 825 and the IDs. The server can therefore search for the first decoding key 825 based on the received ID. Thus cryptocommunication is completed from the first computer to the second computer 821 a. In this case, if the first cipher key and first decoding key are common keys of a common key cipher, not of an public key cipher, they are the same key.
In this case, a signature may be made by means of the secret key of the public key cipher as the first cipher key 816. This method is called digital signature. For a detailed explanation of the operation of �digital signature�, see, for example, �Digital Signature of E-Mail Security by Bruce Schneider 1995�.
If there is a number �n� of, for example, 1,000 plaintext contents 850, the cipher encoder 852 enciphers them with the first to the �m�th cipher keys 851, respectively. The ciphered first to the �m�th contents 853, the decoding program 854 a for the first to �m�th contents, and the second cipher decoder 861 a, which is the program for decoding the second cipher, are recorded as pits in an original disk and then molded into a substrate, and a reflecting film is formed. Thereafter, two substrates are laminated together to complete an optical disk 801. The second cipher encoder 860 enciphers the decoding data 854 such as the password for unlatching the �1-n�th, for example, the first content, and the decoding key. Recorded in advance in the BCA of the first disk are the disk's own identification data, that is, the ID 855 and the second cipher which is the enciphered decoding data. Then, in the reproducer, the second cipher is reproduced from the BCA reproduction part 820. The second cipher decoder 861 is reproduced from the data reproduction part 862, which reproduces the ordinary recorded data other than the BCA. Therefore, the second cipher decoder 861 is used to decode the second cipher, reproducing the ID 855 a and �1-n�th password 854 a. The cipher decoder 855 b uses the decoding program 854 a for the �1-n�th content reproduced from the data reproduction part 862, and uses the ID 855 a and password 854 a to decode the first cipher, obtaining the plaintext 855 c of the �1-n�th content and the identification data 855 a. For a personal computer, the content and ID are recorded on the hard disk 863. This ID 855 a checks to determine if there in no same ID on a network when the program has started, and the ID 855 a actuates the network protection. It is therefore possible to prevent the software from being illegally installed. This is yet another advantage of the present invention. For example, if 1,000 enciphered contents are stored and decoding data such as a password corresponding to a particular software application are recorded on an original disk, this is equivalent in substance to the preparation of an optical ROM disk for a particular content. It is possible to obtain with one original disk the same effect as in the case where original disks for 1,000 kinds of software are cut. It is therefore possible to reduce the costs and time or labor for preparing an original disk.
In FIG. 21, Step (Process) 870 represents the routine of receiving accounting data. If, at Step 870 a, the accounting data is input, the third cipher key of the public key cipher for accounting communication is requested from the second computer. At Step 870 b, the second computer requests the third cipher key from the third computer. The third computer 911 sends the ID and third cipher key to the second computer, though the exchange step is omitted. At Step 870 c, the second computer receives the ID and third cipher key. At Step 870 e, the seventh cipher which is the third cipher key enciphered with the second cipher key for communication and/or the like is sent to the first computer. The first computer receives the seventh cipher at Step 870 f, At Step 870 g, the received seventh cipher is decoded with the second decoding key for communication so as to obtain the third cipher key (public key of public key function). At Stop 870 h, the third cipher key is recorded on the HDD according to circumstances. This is used for the next transmission. At Step 870 i, it is judged if a credit card number, a password for settlement and/or other secret accounting data are input. At Step 870 j, the eighth cipher which is the accounting data enciphered with the third cipher key is sent via the second computer to the third computer. At Step 870 k, the second computer receives the eighth cipher and transfers it again to the third computer. Only the third computer 912, which is, for example, at a banking institution, has the decoding key for the third cipher, so that the second computer, which is an electronic store, cannot decode it. At Step 870 m, the third computer determines from the cipher key data base the third decoding key associated with the third cipher key by using identification data on the disk and/or the like, and decodes the eighth cipher with the third decoding key, which is the secret key of the public key cipher, so as to obtain the plaintext of the accounting data. At Step 870 n, a check is made to judge from the user's credit data, deposit remains and/or other banking data whether the money can be received. At Step 870 p, the third computer informs the second computer of the result of the search. The second computer, which is an electronic store, judges at Step 870 q if the money can be received. If not, the process goes to Step 870 r, where the article and/or the key for decoding the cipher software is not sent. If the money can be received, for a key provision system as shown in FIG. 16, the process goes to Step 870 s, where the cipher software decoding key, that is, the article is sent via Internet 908 to the user's second computer. At Step 870 t, the first computer receives the cipher software decoding key. At Step 870 u, the cipher of the �1-n�th enciphered software is released. At Step 870 w, the plaintext of the software is obtained. In this way, a content key provision system is realized.
With reference to FIG. 22, Step (Process) 872 of cryptocommunication in a case where the cipher key and the decoding key both for communication have been recorded in the BCA will be described. At Step 872 g, the first computer 909 sends to the second computer 910 the ninth cipher which is the user data enciphered with the cipher key for communication reproduced from the BCA, the basic identification data recorded in the ROM area when the original disk was made, and the disk identification data recorded in the BCA area. At Step 872 b, the second computer receives the ninth cipher, the disk identification data and the basic identification data. At Stop 872 c, the decoding key for communication paired with the disk identification data from the decoding key data base is retrieved, and the ninth cipher is decoded to obtain the plaintext of the user data. At Step 872 e, the second cipher key associated with the disk identification data is selected from the cipher key data base. In addition, the second computer sends to the first computer the tenth cipher which is the server data enciphered with this second cipher and the third cipher key received from the third computer by the procedure described in FIG. 21 and enciphered with the second cipher. The first computer receives the tenth cipher at Step 872 f. At Step 872 g, the received seventh cipher is decoded with the second decoding key for communication recorded in the BCA, to obtain the plaintext of the server data and the third cipher key (public key of the public key function). At Step 872 h, according to the need, the third cipher key is recorded on the HDD. At Step 872 i, it is judged if the accounting data is input. If so, the process goes to Step 872 j, where the eleventh cipher which in the accounting data enciphered with the third cipher key is sent via the second computer to the third computer. At Step 872 m, the second computer sends the eleventh cipher again to the third computer. At Step 872 m, the third computer determines from the third cipher key data base, the third cipher key paired with the identification data on the disk and/or the like, and decodes the eleventh cipher to obtain the plaintext of the accounting data. At Step 872 n, the possibility that the money can be received from the user is checked. At Step 872 p, the result of the search is sent to the second computer, At Step 872 q, the second computer checks to judge if the money can be received from the user. If so, for a key provision system as shown in FIG. 16, the process goes to Step 872 s, where the cipher software decoding key, that is, an article is sent via the Internet to the user's second computer. At Step 872 t, the first computer receives the cipher software decoding key. At Step 872 u, the cipher of the �1-n�th enciphered software is released. At Step 872 w, the plaintext of the software is obtained. In this way, a content key provision system is realized.
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U.S. Classification369/275.3, G9B/7.029, 705/57, G9B/20.03, G9B/7.194, G9B/19.017, G9B/19.005, G9B/20.002, G9B/20.027International ClassificationG06K19/14, G06F21/24, G11B23/30, G11B7/005, G06K19/08, G11B20/18, G06F1/00, G11B7/0045, G11B20/10, G06K19/06, G06K19/04, G11B23/28, G11B23/38, G06K1/12, G11B7/00, G06F12/14, G11B23/00, G11B7/24, G11B5/86, G11B27/24, G06F21/10, G11B7/007, G11B19/04, G11B20/00, G11B7/0037, G11B7/26, G11B20/14, G11B20/12, G11B13/04, G11B19/12Cooperative ClassificationG11B20/00326, G11B23/30, G06K19/14, G06K19/08, G11B19/04, G11B20/1833, G11B20/0026, G11B2220/2562, G11B23/0042, G11B27/24, G11B20/00195, G11B20/00347, G11B7/00736, G11B20/00188, G11B2220/2545, G06K19/06028, G11B20/0071, G11B20/00492, G11B13/045, G11B20/00086, G11B20/10, G11B20/00137, G11B20/00152, G11B20/1403, G11B20/00115, G11B7/0037, G11B20/00268, G06K1/126, G06K2019/06271, G11B2020/1259, G06F21/10, G11B20/1426, G11B7/005, G11B20/00123, G11B23/284, G11B20/00514, G11B19/122, G11B20/00528, G11B20/00543, G11B20/00173, G11B19/12, G11B20/00855, G11B20/00253, G11B20/0084, G11B2007/0013, G11B20/00181, G06F2221/0711, G11B20/1252, G11B23/38, G11B20/00876, G11B20/00224, G11B5/86, G11B20/00144, G11B7/007, G11B13/04, G11B20/00094, G11B20/0021, G11B7/26, G11B20/1217, G06K19/04, G11B20/00586European ClassificationG06K19/04, G11B23/00D1A2A, G06K19/14, G11B27/24, G11B20/10, G11B7/007R, G06K1/12D, G06K19/06C1B, G06K19/08, G11B23/38, G11B23/30, G11B19/12C, G11B23/28B2, G06F21/10, G11B20/00P5, G11B20/00P3B, G11B20/00P5G1, G11B20/00P11E, G11B20/00P12, G11B20/00P5A6A1, G11B20/00P5G1E, G11B20/00P5A2, G11B20/00P10, G11B20/00P13, G11B20/00P3C, G11B20/00P4, G11B20/00P6B, G11B20/00P2B, G11B20/00P2, G11B20/00P1D, G11B20/00P1, G11B20/00P1C, G11B20/00P2A, G11B20/00P4B, G11B20/00P5A6, G11B20/00P5A6A, G11B20/00P5A6E, G11B20/00P5A6H, G11B20/00P5G1C, G11B20/00P5G2, G11B7/007, G11B7/26, G11B19/12, G11B20/12D6, G11B20/00P, G11B20/12D, G11B19/04Legal EventsDateCodeEventDescriptionSep 26, 2012FPAYFee 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