CN1795503A - Method and apparatus for the protection of permanent storage media - Google Patents
Method and apparatus for the protection of permanent storage media Download PDFInfo
- Publication number
- CN1795503A CN1795503A CNA2004800143137A CN200480014313A CN1795503A CN 1795503 A CN1795503 A CN 1795503A CN A2004800143137 A CNA2004800143137 A CN A2004800143137A CN 200480014313 A CN200480014313 A CN 200480014313A CN 1795503 A CN1795503 A CN 1795503A
- Authority
- CN
- China
- Prior art keywords
- information
- mounting medium
- copy
- medium
- protection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000003860 storage Methods 0.000 title description 2
- 238000001514 detection method Methods 0.000 claims abstract description 32
- 239000012120 mounting media Substances 0.000 claims description 30
- 239000002609 medium Substances 0.000 claims description 23
- 239000011521 glass Substances 0.000 claims description 17
- 230000002265 prevention Effects 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003362 replicative effect Effects 0.000 description 2
- 108010076504 Protein Sorting Signals Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/28—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
- G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
- G11B27/034—Electronic editing of digitised analogue information signals, e.g. audio or video signals on discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2545—CDs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/90—Tape-like record carriers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/90—Tape-like record carriers
- G11B2220/91—Helical scan format, wherein tracks are slightly tilted with respect to tape direction, e.g. VHS, DAT, DVC, AIT or exabyte
- G11B2220/913—Digital audio tape [DAT] format
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Multimedia (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Storage Device Security (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
Provides is a method and apparatus for protecting information on fixed media where the fixed media including a number of vulnerabilities, the method comprises the steps of: establishing security elements (A, B, C, D, E, F of the fixed media; determining security element variations for each of the security elements; pseudo-randomly choosing one of the security element variations; encoding the information with said pseudo-randomly chosen security element variation; repeating the choosing and encoding steps at least three times, whereby the information is encoded with at least four of said security element variations, creating a copy prevention layer (2); establishing copy detection elements; determining copy detection element variations for each of the copy detection elements; pseudo-randomly choosing at least one of the copy detection element variations; and encoding the copy prevention layer with said at least one chosen copy detection element variations (4), wherein the method allows playback of the information on commercially available media players and wherein the method provides copy protection and a means to discriminate between an original fixed medium and a copied fixed medium.
Description
Technical field
The present invention relates to protection such as the information on the mounting medium of compact disk (CD), digital audiotape (DAT) or digital video disk (DVD) such as the method for data, music or video.More specifically, the present invention relates to the method used during the original fixed medium recording, coded message is to prevent to duplicate and to be convenient to discern any duplicating of being done whereby.
Background technology
Compact disk (CD), digital video disk (DVD) or digital audiotape (DAT) are provided for the single standard digital recording medium of data, software, image and audio frequency.The ability of carrying out accurate replicating medium content usually is basic attribute, realizes exchange, issue and the preservation of information.
Yet, have the demand of duplicating of preventing sometimes.For example, the unauthorized copying to copyrighted data is illegal.Software, music and video provider have the demand with digital form issue copyright work, prevent the unauthorized copying of these works simultaneously.Therefore, the demand that has selectivity forbidden digit information reproduction.
Also there are identification and the demand of distinguishing bootlegging product and primary products.If do not discern the ability of bootlegging, successfully tracking is very difficult with prosecution of copyright pirates.
Attempt the whole bag of tricks and addressed the above problem, but before the present invention, also fully successfully do not realized copy protection and recognition methods.There are some reasons in this.
At first, the method for canned data has strict policy to compact disk for protecting thereon.These policies are called " Green Book ", " yellow book ", " Red Book " and " orange paper ".Any protection and recognition methods must fall into these standards, are readable to guarantee data for all media players.Various copy protection schemes also do not have and above-mentioned operating such, and the result is that the information on the CD is always not readable.For example, some copy protection schemes can not be play on macintosh computer at all, or in some vehicle-mounted CD Player, the CD Player of various brands or can not play in game console.
Secondly, when when for example CD goes up the introducing copy protection, the CD for all similar titles of being made by a company adopts identical protection scheme usually, and it also is identical for all tracks on this CD usually.Such problem is the method that the hacker usually can find to walk around protection scheme, and can find " the cracking " of putting up on the Internet.Such model lost efficacy the copy protection for all similar CD of this manufacturer.
Summary of the invention
The present invention tries hard to overcome above-mentioned defective by a kind of method of known medium weakness of utilizing is provided, wherein, and by using security element and element variable recording medium based on these weakness.Select these security element variation at random, and the information that is placed on the mounting medium is encoded by security element variation.
In addition, by using a plurality of security elements of weave in, make information reproduction difficulty more.The present invention also preferably utilizes each track on the different security elements coding mounting mediums of a plurality of weave ins, thereby makes that the task of cracking the mounting medium security is consuming time huge and heavy.Interweaving of various security element variation and information produced the copy protection layer.
Also increase the copy detection layer on the copy protection layer, the permission copyright owner distinguishes the prototype version of mounting medium and duplicates version.This is beneficial to follows the tracks of and prosecution of copyright pirates.
Can also increase protective seam in batches to mounting medium.This comprises to mounting medium increases one or more physical protection elements.
Use has the device of own coding unit, and coding can be realized above-mentioned purpose from information and the above-mentioned security element and the copy detection element of studio master.This coding unit and processor are mutual, are used for the laser beam recorder of glass master in the control CD manufacturing equipment.The security element of pointing out above each mounting medium that produces from this glass master will comprise.
Therefore, the invention provides the method that a kind of protection is transported to the information on the mounting medium, described mounting medium has multiple weakness, with many security elements that have based on the security element variation of these weakness, described medium also comprises multiple copy detection element and copy detection element variation, and described method comprises step down: select in the described security element variation; Utilize the security element variation of the described selection described information of encoding; Repeat at least once described selection and coding step, prevent layer thereby produce to duplicate; Select at least one described copy detection element variation; Utilize described the duplicating of described at least one selected copy detection element variation coding to prevent layer, thereby produce information encoded; And on described mounting medium, write described coded message; wherein; described method allows playback information on the media player of buying from the market; and wherein said copy protection layer provides copy protection, and the described described copy detection element coding that utilizes provides difference original fixed medium and the method for duplicating mounting medium.
The present invention also provides a kind of device that is used to protect the information on the mounting medium, and described information obtains from the studio master, and described mounting medium has weakness, and described device comprises: processor, and described processor is from studio master acquired information; Coding unit, described coding unit and described processor are mutual, and described coding unit utilization is based on the security element of these weakness and the copy protection element encoding information from the studio master, and provides described information encoded to described processor; Controller is used to control described processor; Laser beam recorder is used to produce glass master, and described laser beam recorder obtains described coded message from described processor; And block press, be used for producing described mounting medium from described glass master.
Description of drawings
Fig. 1 is the diagrammatic representation of safe floor of the present invention;
Fig. 2 represents to be used to realize the schematically illustrating of first embodiment of system of the inventive method; And
Fig. 3 represents to be used to realize the schematically illustrating of second embodiment of system of the inventive method.
Embodiment
With reference now to Fig. 1,, method of the present invention is only based on the realization of the inherent known weakness and the known public sphere solution of the medium that will be recorded.The weakness of such compact disk comprises, for example, changes width, height and the sequential of signal, uses track saltus step or switching; Leading and/or afterbody to each track increases data, increases random sequence number, or revises subchannel.Also there is other weakness, and is as well known to those skilled in the art.Those skilled in the art also recognizes, the medium of other form for example at the signal of transmission over networks, but will have the weakness that the method for the application of the invention is utilized, and the present invention are not restricted to the concrete form of weakness.
Basis of the present invention is based on the mixing and the coupling of the security element of weakness, and wherein, security element is selected by machine pseudorandom ground.Thereby, for example, security element and utilize the track saltus step to increase by the first copy protection element.Next method of the present invention can select the basis of the variable of signal sequence as next security element.
These security elements interweave with symbiosis, and wherein, each security element makes up on another basis as the part of security bundle.By using these security elements, produce copy protection layer 2.
Select many security elements to produce copy protection layers 2 by using from the security element table that processor or scrambler can be used.In these security elements each also has many element variables, and in a preferred embodiment, method of the present invention can also be selected from the element pond that comprises eight security elements at least, and each security element has at least four element variables.The order that can also select element to interweave at random.
The preferred embodiments of the present invention will comprise at least four element variables of each track.In the embodiment in figure 1, copy protection layer 2 comprises six security element variation of selecting at random.They are marked as element " A ", " B ", " C ", " D ", " E " in Fig. 1.
Preferably, copy protection layer 2 will change at each track on the medium.Thereby for example, on music CD, every first song has different copy protection layers 2.Based on the randomness of track one by one and the quantity of solution task extremely consuming time has been proposed " hacker ", to avoid all protection mechanisms that on mounting medium, obtain.
Can on copy protection layer 2, increase single copy detection layer 4.Once more from many known elements, eletric watermark for example, random sequence number is selected single copy detection layer 4 at random in fingerprint and the reception of signals.Other detection technique is known in the art, and the present invention is not restricted to any one detection elements.
Each copy detection element also can comprise many variablees, and computing machine can select from these variablees once more, makes the duplicator be difficult to detect copy detection element.In Fig. 1, with symbol " G " expression copy detection element variation.
Usually, do not transmit copy detection element between master and duplicate, providing the proof CD to the copyright owner in master is the method for duplicate.This provides the advantage of the provable piracy of copyright owner now.
Can on single copy detection layer 4, increase batch duplicating detection layers 6.Batch duplicating detection layers 6 can comprise the one or more projects from one group of physical protection element.They comprise various types of physical watermarks, physical serial numbers, holographic label, or other physical schemes.These physical protection elements may be visible, also may be sightless.The physical protection element is known, and person of skill in the art will appreciate that, except listing above, can also use other physical protection element, and the present invention is not restricted to any specific physical protection element.
With reference to figure 1, these elements are combination in the following manner usually.Select at random to be typically expressed as: X=(ABCDEF)+G+H, wherein:
X prevents and protects selection for duplicating;
A, B, C, D, E and F the random element variable that is used for the reprography protection for selecting at random;
G can be the single copy detection element variation of selecting at random; And
H can be the batch duplicating protection element variable of selecting at random.
Thereby one group of copy protection element combines with single duplicating with the batch duplicating detection elements.
By guaranteeing that among the A to H any fix, for example it can be used as and guarantee to exist watermark on mounting medium, can revise such scheme to meet consumers' demand.In addition, if the user needs, can increase another layer " I " enciphered data.They are different to " H " with layer " A ", and it is deal with data not usually, but handle the consonant rail.
Method of the present invention also has several the rules that should follow:
1. the All Media of being revised by this guard method must be play on any " orange paper " compatible commercial player;
2. when playing the static medium that is protected, should there be appreciable distortion or noise;
3. the medium that utilize PC to duplicate should show protection;
4. protection should be the result of protection element combinations; And
5. protection should be the result of the inherent weakness related with medium, and comprises the electronics and physics increase of security element.Security element can comprise hard and soft element variable, and wherein, hard security element passes through when duplicating, and soft element variable does not pass through when duplicating.Physical security elements also can be used for distinguishing original medium and replicating medium, and is used for the anti-pirate of retail level.
Above-mentioned protection scheme by provide be difficult to crack and with track one by one or be grouped into the defective that protection scheme that the basis changes overcomes prior art one by one.Another possibility that is used to protect is for each glass master, and this scheme can be different, and auxiliary generation is used for a plurality of protection schemes of same title.This protection scheme also comprises the copy detection scheme, and it can be used for discerning pirate duplicate and original duplicate.
Such scheme can be used in batches or independent data CD, music CD, video DVD or other medium.In other words, a plurality of media, CD for example can change protection scheme or have identical protection scheme for CD by the gross for each CD.The complicacy of every kind of protection scheme is through mature consideration, and security feature interweaves, to increase its conservation value.Yet it is simple that guard method keeps, and deciphers rapidly with the playback apparatus of guaranteeing playing back music, video or accepting data.
Above-mentioned protection scheme can be realized according to the methods below.With reference now to Fig. 2.
The information that comprises in studio master 22 arrives processor 26 by interface 24.Controller 30 is used for control and upgrades this processor 26.
This processor also comprises coding unit 28.Coding unit 28 comprises the pseudorandom selector switch, and it selects security element variation and copy detection variations, as the description in the top method of the present invention.
Scrambler 28 will be channel and subchannel bit sequence from the original symbol sequential coding of interface 24 on every track basis, and it can be read by the compatible demoder of all commerce " orange paper ".They will comprise the part of many anti-copying equipment elements as the security bundle feature.Coded sequence arrives laser beam recorder 34 by laser beam recorder (LBR) interface 32, and it is included in the commercial CD manufacturing equipment.
LBR 34 is used for making (a plurality of) glass master 36.Block press 38 uses glass master 36 to produce the CD 40 that is used to issue then.In a preferred embodiment, block press 40 is subject to from single glass master 36 producible CD quantity.Cooperation by manufacturer can realize this point.
The security of additional level is provided from single glass master 36 producible limited CD quantity.From single glass master 36 producible CD quantity, 50000 parts of duplicate for example, popular CD will need many glass master 36 to satisfy the demand to this CD by restriction.Each glass master will have the different safe floors that produced by coding unit 28, thereby and if produced 100 ten thousand CD, the CD of 20 different codings will be arranged so.Even hacker's spended time has cracked the protection scheme of a CD, and it is posted on the Internet, this will only make user's income of the duplicate of the CD with identical protection mechanism.
In not needing the replacement medium of glass master, be to be that each medium duplicate to be released produces unique protection mechanism for a possibility of predicting of method of the present invention.Thereby the product of each issue has different protection schemes, and the hacker cracks one of them and can not help other any one.
In one embodiment, can increase feedback to controller 30 from CD manufacturer.This feedback is exclusively used in the glass master quantity that foundation will be made.
Another embodiment shown in Figure 3.Embodiment among Fig. 3 comprise with Fig. 2 in the identical configuration found, but increased the physical protection element.Thereby this embodiment allows to increase batch duplicating layer 6.
The embodiment of Fig. 3 utilizes other attribute of physical areas of the CD 40 of issue.The extra information of physical encoder 42 codings, and do not increase expense or other data to track.The sequence number of some the comprised increases in these elements, random number, batch lot codes, coloring agent mark and other method are can carry out court and anti-pirate judgement.
In the embodiments of figure 3, controller 30 is to physical encoder 42 transmission information.Physical encoder 42 comprises the physical security elements information of selecting at random, and by interface 43 notice molding apparatus 38 physical security elements is encoded to the CD 40 of mold pressing for issue.
Although be above, also expect the manufacturing of DVD, DAT and other mounting medium, and those skilled in the art will know that method of the present invention can be used for the form of medium of all beared informations at the CD explanation.
Thereby said method is produced a kind of medium with device, and it does not allow intelligence machine such as PC or batch duplicating machine to duplicate information on it.It also provides physics and soft copy detection, determines that with the copyright owner who allows works suspicious medium is original or duplicates.
Although describe the present invention in detail with reference to its preferred embodiment, the technology people of this area finds that easily other form also is possible, and the present invention is only by following claim scope restriction.
Claims (16)
1. method, protection is transported to the information on the mounting medium, shown in mounting medium have a plurality of weakness and many security element variation based on these weakness, described mounting medium has a plurality of copy detection element variation, said method comprising the steps of:
Select one of described security element variation;
Utilize the security element variation of the described selection described information of encoding;
Repeat at least once described selection and coding step, therefore produce the copy protection layer;
Select at least one described copy detection element variation;
Utilize described the duplicating of copy detection element variation coding of described at least one selection to prevent layer, therefore produce information encoded; And
Described coded message is write on the described fixed medium, and wherein, described information is protected on described mounting medium.
2. the method for claim 1, further comprising the steps of:
Set up the physical protection element;
Determine the physical protection element variable at each described physical protection element;
One in the described physical protection element variable is selected on pseudorandom ground;
Increase the described physical protection element variable of selecting at random to described mounting medium.
3. method as claimed in claim 1 or 2, wherein, the described step of selecting security element variation is carried out on pseudorandom ground.
4. as arbitrary described method in the claim 1 to 3, wherein, the described step of selecting described at least one described copy detection variations is carried out on pseudorandom ground.
5. as arbitrary described method in the claim 1 to 4, wherein, based on described mounting medium to track one by one or one by one grouping carry out described method.
6. as arbitrary described method in the claim 1 to 5, wherein, described repeating step is carried out 3 times at least.
7. as arbitrary described method in the claim 1 to 6, wherein, described mounting medium is a digital media.
8. method as claimed in claim 7, wherein, described mounting medium is a compact disk.
9. method as claimed in claim 7, wherein, described mounting medium is a digital audiotape.
10. method as claimed in claim 7, wherein, described mounting medium is a digital video disc.
11. as arbitrary described method in the claim 1 to 10, wherein, described information can be recovered by commercial media player.
12. as arbitrary described method in the claim 1 to 11, wherein, described copy protection layer prevents to duplicate on intelligence machine.
13. a device is used to protect the information on the mounting medium, described information obtains from the studio master, and described medium has weakness, and described device comprises:
Processor, described processor is from studio master acquired information;
Coding unit, described coding unit and described processor are mutual, and described coding unit utilization is based on the security element of weakness and the copy protection element encoding information from the studio master, and provides described information encoded to described processor;
Controller; Be used to control described processor;
Laser beam recorder is used to produce glass master, and described laser beam recorder obtains described coded message from described processor; And
Block press is used for producing described mounting medium from described glass master.
14. device as claimed in claim 13 also comprises the physical protection unit, described physical protection unit and described block press are mutual, to increase the physical protection element to described mounting medium.
15. device as claimed in claim 14, wherein, described physical protection unit is controlled by described controller.
16. as claim 13 or 15 described devices, wherein, described laser beam recorder is included in the feedback interface of described controller, is produced the quantity of glass master by described laser beam recorder with restriction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002427023A CA2427023A1 (en) | 2003-04-29 | 2003-04-29 | Method and apparatus for the protection of fixed media |
| CA2,427,023 | 2003-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1795503A true CN1795503A (en) | 2006-06-28 |
Family
ID=33315191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004800143137A Pending CN1795503A (en) | 2003-04-29 | 2004-04-29 | Method and apparatus for the protection of permanent storage media |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1656673A1 (en) |
| JP (1) | JP2006526233A (en) |
| KR (1) | KR20060017762A (en) |
| CN (1) | CN1795503A (en) |
| CA (1) | CA2427023A1 (en) |
| WO (1) | WO2004097825A1 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3469650B2 (en) * | 1994-09-13 | 2003-11-25 | ソニー株式会社 | Optical recording medium and signal recording method |
| EP1076902A4 (en) * | 1996-08-05 | 2001-05-23 | Ttr Technologies Ltd | Digital optical media authentication and copy protection method |
| US6076165A (en) * | 1998-01-16 | 2000-06-13 | Sony Corporation | Method for authenticating digital recording devices |
| EP0955634A1 (en) * | 1998-05-04 | 1999-11-10 | Spiro J. Pandelidis High Tech Applications | Anti-copying system for audio signals |
| WO2001080546A2 (en) * | 1999-08-09 | 2001-10-25 | Midbar Tech Ltd. | Prevention of cd-audio piracy using sub-code channels |
| US6356517B1 (en) * | 2000-10-27 | 2002-03-12 | Job Tien-Chiang Liu | Optical disc with a control chip |
| US6925342B2 (en) * | 2000-12-05 | 2005-08-02 | Koninklijke Philips Electronics N.V. | System and method for protecting digital media |
| DE10226324A1 (en) * | 2002-06-11 | 2003-01-02 | Albert J R Eibich | Method for preventing illegal copying of audio CDs wherein a protective signal is placed in each track to reliably interrupt a copying process and render copying of even single tracks inviable |
-
2003
- 2003-04-29 CA CA002427023A patent/CA2427023A1/en not_active Abandoned
-
2004
- 2004-04-29 EP EP04730171A patent/EP1656673A1/en not_active Withdrawn
- 2004-04-29 KR KR1020057020600A patent/KR20060017762A/en not_active Application Discontinuation
- 2004-04-29 WO PCT/CA2004/000632 patent/WO2004097825A1/en not_active Application Discontinuation
- 2004-04-29 JP JP2006504124A patent/JP2006526233A/en not_active Withdrawn
- 2004-04-29 CN CNA2004800143137A patent/CN1795503A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP1656673A1 (en) | 2006-05-17 |
| KR20060017762A (en) | 2006-02-27 |
| JP2006526233A (en) | 2006-11-16 |
| CA2427023A1 (en) | 2004-10-29 |
| WO2004097825A1 (en) | 2004-11-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1259961B1 (en) | System and method for protecting digital media | |
| JP4046767B2 (en) | Recording signal copy prevention system | |
| Lacy et al. | Intellectual property protection systems and digital watermarking | |
| KR100336253B1 (en) | Method of providing an optical data carrier with identity information | |
| CN1313599A (en) | Encrypted information signal, information recording medium, information signal regenerating and recording device | |
| CN1383669A (en) | Additional information embedding device and additional information embedding method | |
| US20020073317A1 (en) | System and method for protecting digital media | |
| CN1491413A (en) | Data copy-protecting system for creating copy-secured optical disc and corresponding protecting method | |
| KR20040035831A (en) | Using multiple watermarks to protect content material | |
| CN1218928A (en) | Data control system | |
| KR100493311B1 (en) | Watermark-based copy management system and method for digital media copy protection | |
| CN1608293A (en) | Method and apparatus to prevent the unauthorized copying of digital information | |
| CN1526088A (en) | Processing copy protection signals | |
| CN1795503A (en) | Method and apparatus for the protection of permanent storage media | |
| CN1445777A (en) | Method and device for preventing digital data copy | |
| US20030088773A1 (en) | Method of and apparatus for preventing illicit copying of digital content | |
| CN1319228A (en) | Copy protection method for digital data stored on medium | |
| CN1110923C (en) | Manufacturing method of video CD disk with sequencial reproducing | |
| JP2010044849A (en) | Anti-piracy optical disk | |
| CN1839395A (en) | Fingerprinting of data |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |