JPH11149709A - Chargeable-broadcast recording and reproducing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chargeable-broadcast recording and reproducing method, in which the control of the utilization of recording, reproduction, etc., and charging corresponding to the control are carried out while ensuring integrity against malfeasance and management and treatment are facilitated. SOLUTION: In the chargeable-broadcast transmission method, in which program signals composed of a video/video and/or various data are transmitted scrambled, CA(limited reception) information signal, in which the reception conditions of a program and a scrambling key are encrypted, is transmitted separately or multiplexed to a program signal and only receivers satisfying the reception conditions releases scrambling by the scrambling key and can use the program, a recording medium cassette 10, in which a recording medium 11 and a medium attached security module 12 are unified, is employed. The program signal, in which scrambling is executed to a recording medium 11, is recorded to the recording medium cassette while the viewing qualification information of the program is stored in the medium attached security module 12, and the program signal recorded on the recording medium is de-scrambled by a medium attached security module function at the time of reproduction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CA (Conditional Access: conditional access) which scrambles and transmits a program signal composed of video / audio and / or various data, and encrypts a program receiving condition and a scramble key. )
It belongs to the field of pay broadcasting transmission method in which an information signal is transmitted separately or multiplexed to a program signal, and only a receiver who satisfies the receiving conditions can use the program by descrambling with a scramble key. The present invention relates to a method for finely controlling the use when recording and playing back on a recording medium.

[0002]

2. Description of the Related Art As a first prior art, a schematic block diagram of a configuration for recording and reproducing a descrambled program signal is shown in FIG. When recording in the first prior art, the following operation is performed. Receiver circuit 1
The scrambled program signal received at (1) is input to the descrambler circuit 2. On the other hand, the CA information signal is C
The information is extracted by the A information separation circuit 4 and input to the security module (SM) 6 via the security module interface (SM interface) circuit 5.
Therefore, the security module 6 decrypts the CA information signal, determines whether the use condition is satisfied, and passes the scramble key to the descrambler circuit 2. The program signal is descrambled in the descrambler circuit 2 according to the scramble key. The descrambled program signal is sent to the recording medium 11 by the recording / reproducing circuit 7.
Will be recorded.

In the case of reproduction, a descrambled program signal is obtained by reproducing the recording medium 11 of the recording medium cassette by the recording / reproducing circuit 7. The descrambled program signal is supplied to the decoder circuit 3.
And presented to the display device 8.

In this method, since the descrambled program signal is transparently recorded and reproduced on the recording medium, any number of descrambled program signals can be recorded, and the reproduced descrambled program signal can be viewed immediately after reproduction. It is also possible to make duplicates. As described above, the first conventional technique has no means for controlling recording or duplication of a program.

[0005] As a second prior art, in addition to the first prior art, a CGMS (Copy Generation Management System) is used.
FIG. 8 shows a schematic block diagram of the configuration when the technology is used.
CGMS technology is a 2-bit CGMS signal.
In the case of "00", "copy permitted without restriction", "10"
In this technique, copy generation is controlled by designating "copying is permitted for only one generation" in the case of "11" and "copy prohibited" in the case of "11".

In the case of recording in the second prior art, the following operation is performed. The scrambled program signal received by the receiver circuit 1 is input to the descrambler circuit 2. On the other hand, the CA information signal is extracted by the CA information separation circuit 4 and input to the security module 6 via the security module interface circuit 5. Therefore, in security module 6, C
After decrypting the A information signal and determining whether the use condition is satisfied, the scramble key is passed to the descrambler circuit 2. The program signal is descrambled in the descrambler circuit 2 according to the scramble key. The operation so far is the same as that of the first conventional technique. Next, the descrambled program signal is sent to the CGMS control circuit 9.
The CGMS signal is checked at. When the CGMS signal is “00”, the recording / reproducing circuit 7 controls the recording medium 1
1 and the recording is prohibited when the CGMS signal is “11”. When the CGMS signal is “10”, the CGMS signal is rewritten to “11” and then recorded on the recording medium 11 by the recording / reproducing circuit 7. This prohibits the next generation copy.

[0007] In the case of reproduction, the recording medium 11 of the recording medium cassette is reproduced by the recording / reproduction circuit 7 to obtain a descrambled program signal.
The descrambled program signal is decoded by the decoder circuit 3 and presented to the display device 8.

[0008] In this method, "copy permitted without constraint", "copy only one generation", and "copy prohibited" are used.
The copy generation can be controlled. However, it is not possible to perform usage control other than copy generation control (for example, control of the number of times of viewing, viewing time limit, number of copies, etc.) or to associate these usage controls with charging. Also, CGMS
Control can be invalidated by rewriting the signal, any number of copies can be made by simply copying the recording medium regardless of the CGMS signal, and there is also a problem in terms of security.

FIG. 9 is a schematic block diagram showing the configuration of a third conventional technique for recording and reproducing a program signal in a scrambled state. In the case of recording according to the third conventional technique, the received program signal is recorded on the recording medium 11 by the recording / reproducing circuit 7 of the recording / reproducing apparatus while being scrambled.

The following operation is performed for reproduction. The recording medium 11 in the recording medium cassette is reproduced by the recording / reproducing circuit 7 to obtain a scrambled program signal as in the recording state. The scrambled program signal is input to the descrambler circuit 2. C
The A information signal is reproduced by the recording / reproducing circuit 7 together with the program signal, extracted by the CA information separating circuit 4, and then input to the security module 6 via the security module interface circuit 5. Therefore,
The security module 6 decrypts the CA information signal and determines whether or not the use condition is satisfied, and then passes the scramble key to the descrambler circuit 2. The program signal is descrambled by the descrambler circuit 2 according to the scramble key, decoded by the decoder circuit 3 and presented to the display device 8.

According to this method, the program signal is recorded on the recording medium without being scrambled. Therefore, even if a simple copy of the recording medium is performed, the program cannot be viewed without the security module. Since it is not possible, it has been improved in terms of safety. In addition, since the security module is used at the time of reproduction / viewing, the use of the security module can be finely controlled within a range in which the security module is involved, and the use control can be associated with charging. .

[0012] However, these control functions do not work effectively unless the recording medium on which a certain program is recorded and the security module in which the viewing qualification of the program is stored are always treated as a pair. Therefore, it is necessary to manage the paired recording medium and the security module so that the relation can be understood. Since the security module used for a certain period has a paired relationship with a plurality of recording media recorded during that period, its management is very troublesome.

[0013]

In the second prior art,
Since only the status of the copy generation is simply indicated by the 2-bit CGMS signal, control other than the copy generation cannot be performed. No security against fraud (falsification of CGMS signal is easy). Inability to control billing (because it is technically possible but not secure). The third prior art is inconvenient to carry because a program cannot be reproduced and used unless a recording medium on which a program signal is recorded and a security module having a license to use the program are used in pairs. Need to carry both). There is a risk of losing playback rights (possible loss of security module). Further, since one security module has a use qualification for a plurality of programs recorded on a plurality of recording media, the recording media cannot be used independently (inconvenient for transfer or temporary lending). The usage qualification may overflow. There is a problem.

An object of the present invention is to provide a pay broadcast recording / reproducing method which satisfies the following conditions at the same time.・ To be able to control detailed usage such as the number of times of viewing, viewing period, number of copies, etc.・ Being able to charge related to these controls is also possible.・ The above controls must be safe against fraud. -The management of the recording medium must not be complicated.

[0015]

In order to achieve this object, a first pay broadcast recording / reproducing method of the present invention scrambles and transmits a program signal composed of video / audio and / or various data and transmits the program signal. A pay-broadcasting transmission method in which a CA information signal obtained by encrypting a use condition and a scramble key is transmitted separately or multiplexed with a program signal, and only a receiver satisfying the use condition can use the program by descrambling with the scramble key. , A descrambler circuit, a security module interface circuit, a security module, a recording / reproducing circuit, and a recording medium cassette provided with a recording medium and a security module attached to a medium. To decrypt and use the obtained usage conditions After the comparison and inspection, if the conditions are satisfied, the scrambled program signal is recorded on the recording medium of the recording medium cassette by the recording / reproducing circuit and transmitted from the security module via the security module interface circuit. C of the program to the security module attached to the medium of the recording medium cassette
In the case where the encryption / decryption key and the qualification information of the A information signal are moved or copied and reproduced, the security module attached to the medium of the recording medium cassette decrypts the CA information signal and uses the obtained usage conditions. Qualification and comparison
Inspection, and if the conditions are satisfied, the scramble key is supplied to the descrambler circuit, so that the program signal obtained by reproducing the recording medium of the recording medium cassette by the recording / reproducing circuit is processed by the descrambler circuit. The scramble is released according to the scramble key.

The second pay broadcast recording / reproducing method according to the present invention is characterized in that a program signal composed of video / audio and / or various data is scrambled and transmitted, and the use condition of the program and a CA which encrypts a scramble key are encrypted. A descrambling circuit, a security module interface circuit, and a pay-broadcasting transmission method in which an information signal is transmitted separately or multiplexed with a program signal, and only a receiver satisfying a use condition can use a program by descrambling with a scramble key. , Security module, recording circuit,
When a recording circuit cassette is provided with a reproducing circuit and two sets of recording media and a security module attached to the media, and the recording is performed, the security module decrypts the CA information signal, and certifies the obtained use conditions as qualifications. After the comparison and inspection, if the conditions are satisfied, the scrambled program signal is recorded on the recording medium of the recording medium cassette by the recording circuit, and the recording medium is transmitted from the security module via the security module interface circuit. In the case where the encryption / decryption key and the qualification information of the CA information signal of the program are transferred or copied to the security module attached to the medium of the cassette, and reproduced, the security module attached to the medium of the recording medium cassette encrypts the CA information signal. Decrypt and use the obtained terms and conditions The program signal obtained by reproducing the recording medium of the recording medium cassette by the reproducing circuit is supplied to the descrambler circuit by supplying the scramble key to the descrambler circuit if the conditions are satisfied. When descrambling is performed according to the scramble key and copying is performed, the security module attached to the medium of the recording medium cassette on the reproducing side decrypts the CA information signal and compares and checks the obtained use condition with the use qualification. If the conditions are satisfied, the scrambled program signal reproduced by the reproducing circuit from the recording medium of the recording medium cassette on the reproducing side is recorded by the recording circuit on the recording side by the recording circuit in the scrambled state. In addition to recording on the recording medium of the cassette, the playback side From the media supplied with the security module of the recording medium cassette to the medium comes security module of the recording side of the recording medium cassette for moving or replication of decryption keys and credentials for the program of the CA information signal, characterized in that.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention uses a recording medium cassette in which a recording medium and a security module attached to a medium are integrated. In this recording medium cassette, a program signal obtained by scrambling the recording medium is recorded, and the viewing qualification information of the program is stored in the security module attached to the medium. The program signal recorded on the recording medium is descrambled by the security module function attached to the medium at the time of reproduction and becomes viewable.

By doing so, the security module is involved in the reproduction, so that it is possible to perform fine-grained control at the time of use and billing associated therewith.
These control decisions are made in the security module, and encryption is used for signals input to and output from the security module, so that security against fraud is high. Further, even if a simple copy of the recording medium is made, the security module is practically impossible to copy, so that the security against unauthorized copying is high. Furthermore, since the recording medium on which the scrambled program signal is recorded and the security module storing the viewing qualification information of the program are integrated as a recording medium cassette, management and handling are easy.

[0019]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows a schematic block diagram of the basic configuration of the present invention. In the basic configuration, the receiver circuit 1,
CA information separation circuit 4, descrambler circuit 2, decoder circuit 3, security module interface circuit 5, security module 6, and recording / reproducing circuit 7
Is provided. Further, a recording medium cassette 10 including a recording medium 11 and a security module 12 attached to a medium is used. Here, the security module 6 and the medium-attached security module 12
It has a built-in U and has a cryptographic operation function and a condition checking function. Note that whether or not the receiver circuit 1, the CA information separation circuit 4, and the decoder circuit 3 are included in the receiver housing does not affect the value of the present invention. Similarly, whether the recording / reproducing circuit 7 is separate from the receiver as a recording / reproducing device or integrated with the receiver housing does not affect the value of the present invention.

First, the case where normal viewing is performed in the basic configuration will be described with reference to FIG. 2 which reflects the flow of signals during viewing in FIG. A CA information signal obtained via the receiver circuit 1, the CA information separation circuit 4, and the like is input to the security module 6 via the security module interface circuit 5. The security module 6 compares and checks the usage conditions obtained by decrypting the CA information signal with the usage qualifications of the security module 6, and passes the scramble key to the descrambler circuit 2 if the conditions are satisfied. On the other hand, the scrambled program signal received by the receiver circuit 1 is descrambled by the descrambler circuit 2 according to the scramble key, decoded by the decoder circuit 3 and presented to the display device 8. The operation in this case is similar to that of the conventional pay broadcasting system. Note that various transmission forms are conceivable for the CA information, and a method of transmitting the CA information by multiplexing it with a program signal as shown here is one example.

Next, a case where recording is performed in the basic configuration will be described with reference to FIG. 3 in which the signal flow during recording is reflected in FIG. First, a CA information signal obtained through the receiver circuit 1, the CA information separation circuit 4, and the like is input to the security module 6 through the security module interface circuit 5. The security module 6 decrypts the CA information signal and compares the obtained usage conditions with the usage qualifications of the security module 6.
The inspection is performed, and if the conditions are satisfied, the following operation is performed.

The program signal received by the receiver circuit 1 is
The recording / reproducing circuit 7 remains scrambled.
Is recorded on the recording medium 11 of the recording medium cassette 10. The CA information signal is recorded on the recording medium 11 of the recording medium cassette 10 together with the program signal, or is extracted by the CA information separation circuit 4, and is output via the security module interface circuit 5. Is stored. At the same time, the security module 6 transfers or copies the encryption / decryption key and the qualification information of the program CA information signal from the security module 6 to the medium-attached security module 12 of the recording medium cassette via the security module interface circuit 5. At this time, if necessary, information on the accounting accompanying the recording is stored in the security module 6.

Finally, in the case of performing reproduction in the basic configuration, FIG.
This will be described with reference to FIG. Recording medium 11 of recording medium cassette
Is reproduced by the recording / reproducing circuit 7 to obtain a scrambled program signal as in the recording state. The scrambled program signal is input to the descrambler circuit 2. When the CA information signal is recorded on the recording medium 11 of the recording medium cassette 10 together with the program signal, C
The A information signal is reproduced together with the program signal by the recording / reproducing circuit 7, extracted by the CA information separating circuit 4, and then input to the medium-attached security module 12 of the recording medium cassette 10 via the security module interface circuit 5. On the other hand, the CA information signal is transmitted to the security module 12 attached to the medium of the recording medium cassette 10.
, The security module with media 12 already has the CA information signal. Therefore, the medium-attached security module 12 decrypts the CA information signal, compares and checks the obtained use condition with the use qualification of the security module 6, and if the condition is satisfied, descrambles the scramble key. Hand over to circuit 2. At this time, the information on the billing associated with the reproduction is stored in the security module 6 as necessary. The program signal is descrambled by the descrambler circuit 2 according to the scramble key, decoded by the decoder circuit 3 and presented to the display device 8.

In these operations, signals input to and output from the security module 6 and the security module 12 attached to the medium are encrypted. Among them, the CA information signal is encrypted in the conditional access system for transmission, and thus may be used as it is. The signal transmitted and received between the security module 6 and the security module 12 attached to the medium is at least the CA
It is necessary to use an encryption key different from the information signal. Further, it is desirable from the viewpoint of security to use an encryption method different from the encryption method of the conditional access system.

The recording medium 11 may be a magnetic recording tape, a magnetic disk, a magneto-optical disk, or the like. Further, for example, a magnetic disk, a floppy disk-like disk in which only a medium is formed into a cassette, or a hard disk drive-like integrated with a magnetic head and a recording / reproducing circuit may be used. On the other hand, as the medium-attached security module 12, a security module having a non-contact interface, etc., such as a CPU chip used for an IC card defined in ISO-7816, can be considered. According to these combinations, the recording medium cassette 10 has many possible forms.

As a second embodiment of the present invention, FIG. 5 is a schematic block diagram showing a configuration in which a program signal can be copied from a recording medium cassette to a recording medium cassette.
A recording medium cassette 20 including a recording medium 21 and a security module 22 attached to a medium and a recording / reproducing circuit 17 are added to the basic configuration of FIG. The operation when copying from the recording medium cassette 10 to the recording medium cassette 20 will be described below. In this case, the recording / reproducing circuit 7 performs a reproducing operation, and the recording / reproducing circuit 17 performs a recording operation.

The recording medium 11 of the recording medium cassette 10 is reproduced by the recording / reproducing circuit 7 to obtain a scrambled program signal. This program signal is recorded on the recording medium 21 of the recording medium cassette 20 by the recording / reproducing circuit 17 in a state in which the program signal has been scrambled. Further, when the CA information signal is recorded on the recording medium together with the program signal, the CA information signal is reproduced by the recording / reproducing circuit 7 together with the program signal, extracted by the CA information separating circuit 4, and then extracted by the security module interface. The data is input to the security module 12 attached to the recording medium cassette 10 via the circuit 5. On the other hand, if the CA information signal is stored in the medium-attached security module 12 of the recording medium cassette 10, the medium-attached security module 12 already has the CA information signal.
Therefore, in the medium-attached security module 12, C
After decrypting the A information signal and determining whether the use condition is satisfied, the security module 12 attached to the medium is transmitted via the security module interface circuit 5.
Then, the encryption / decryption key and the qualification information of the program CA information signal are moved or copied to the medium-attached security module 22. At this time, if necessary, information on accounting associated with the copying is stored in the security module 6. At the same time, when the CA information signal is recorded on a recording medium together with the program signal, the CA information signal is recorded on the recording medium 1 along the same path as the program signal.
1 is copied to the recording medium 21 and stored in the security module attached to the medium, and is copied from the security module attached to the medium 12 to the security module 22 attached to the medium via the security module interface circuit 5.

Next, as a third embodiment, a case of using a PC (personal computer) for recording, editing, and displaying will be described with reference to FIG. In the basic configuration of FIG. 1, the recording / reproducing circuit is a PC interface circuit 3
First, the recording medium is replaced with a storage function 33 of the PC, and the security module attached to the medium is replaced with the security module 32 attached to the PC. Further, it is possible to display and edit the data on the PC itself, but a descrambling function 34, an editing function 35, and a presentation function 36 used in this case are added. A PC (personal computer) 30 includes a PC interface circuit 3
1 includes a security module 32 attached to a PC, a storage function 33, a descrambling function 34, an editing function 35, and a presentation function 36. Each function of the storage function 33, the descrambling function 34, the editing function 35, and the presentation function 36 includes a case where the functions are realized by a CPU of a PC and software. In the configuration shown in FIG. 6, when performing recording / reproduction, the recording / reproduction circuit in the first embodiment is used for the PC interface circuit 31 and the recording medium is used for the storage function 33 of the PC.
In addition, it is the same as that in which the security module attached to the medium is replaced with the security module 32 attached to the PC. At this time, the functions of the descrambling function 34, the editing function 35, and the presentation function 36 have no relation to the operation.

Further, in the configuration of FIG.
It is also possible to display and edit by C itself.
The scrambled program signal read from the storage function 33 is descrambled by the descrambling function 34 of the PC and presented by the presentation function 36. Further, in the case of editing, the data is edited by the editing function 35 and then presented again by the presenting function 36 or stored in the storage function 33. At this time, a scramble key required for descrambling in the descrambling function 34 of the PC is obtained as follows. The CA information signal is read out from the storage function 33 together with the program signal and passed to the security module 32 attached to the PC (when the CA information signal is stored in the storage function 33 together with the program signal), or the security module 12 attached to the PC (When stored in the security module 12 attached to the PC). Security module 32 attached to PC
Then, the CA information signal is decrypted, and it is determined whether the use condition is satisfied.
Passed to. At this time, if a charge is incurred for this display or editing, the security module 32 attached to the PC
It communicates with the security module 6 via the security module interface 5 and stores billing information in the security module 6. Although the embodiment of the present invention has been described in detail with some examples,
It is obvious that the present invention is not limited to these embodiments and various modifications and changes can be made within the gist of the invention.

[0030]

According to the present invention, since the use condition check at the time of recording and at the time of reproduction is performed in the security module with a built-in CPU or the security module attached to the medium, various use conditions are set and the use is controlled according to the use condition. It becomes possible to charge. For example, the following control and charging can be performed. Records with a limited number of uses in advance and billing for them Records with a limited expiration date and billing for them Records with a limited number of copies in advance and billing for them Records with reserved usage conditions and use at the time of actual use Charging according to the number of times Recording with the usage conditions suspended and charging according to the number of copies at the time of actual copying Preliminarily limiting the number of copies and the number of uses and receiving the distribution of the number of copies and the number of uses from the record A duplicate of the above.

Since the use condition check is performed inside the security module or the security module attached to the medium, these processes are safe from fraud. For example, even if it is possible to simply copy a recording medium on which a program signal is recorded, it is virtually impossible to copy a security module attached to a medium that stores scramble key information and qualification information. That is, illegal duplication of the program is prevented.

Further, a recording medium on which a program signal is recorded,
The security module attached to the medium, which records the use qualification of the program, is integrated with the recording medium cassette and handled. Therefore, the program can be used within the use qualification as long as the user has this recording medium cassette. In other words, while controlling the use qualification, it can be handled as a “thing” that can be moved, transferred, lent and borrowed, etc., like the conventional recording medium. Note that the medium-attached security module of the recording medium cassette only needs to record the use qualification of the program that has just been recorded on the recording medium of the recording medium cassette, so that the overflow of the storage capacity can be prevented systematically. .

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of the present invention.

FIG. 2 is a diagram illustrating a signal flow during normal viewing in the basic configuration.

FIG. 3 is a diagram illustrating a signal flow during recording in the basic configuration.

FIG. 4 is a diagram illustrating the flow of signals during reproduction in the basic configuration.

FIG. 5 is an explanatory diagram of a second embodiment.

FIG. 6 is an explanatory diagram of a third embodiment.

FIG. 7 is an explanatory diagram of a first related art.

FIG. 8 is an explanatory diagram of a second related art.

FIG. 9 is an explanatory diagram of a third conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Receiver circuit 2 Descrambler circuit 3 Decoder circuit 4 CA information separation circuit 5 Security module interface circuit 6 Security module 7 Recording / playback circuit 8 Display device 9 CGMS control circuit 10 Recording medium cassette 11 Recording medium 12 Security module with medium 17 Recording / Reproduction circuit 20 Recording medium cassette 21 Recording medium 22 Security module with medium 30 PC (personal computer) 31 PC interface 32 Security module with PC 33 Storage function 34 Descramble function 35 Editing function 36 Presentation function

Claims (14)

[Claims] 1. A program signal comprising video / audio and / or various data is scrambled and transmitted, and a CA information signal obtained by encrypting a program use condition and a scramble key is transmitted separately or multiplexed with the program signal. And a pay-broadcasting transmission method in which only a receiver that satisfies usage conditions can use a program by descrambling with a scramble key, wherein a descrambler circuit, a security module interface circuit, a security module, a recording / reproducing circuit, and a recording medium are provided. When a recording medium cassette with a security module attached to the medium is provided and recording is performed, the security module decrypts the CA information signal, compares and verifies the obtained usage conditions with the usage qualification, and satisfies the conditions. If it is, turn the scrambled A signal is recorded on a recording medium of a recording medium cassette by a recording / reproducing circuit, and a decryption key and a qualification information of a CA information signal of the program are transmitted from the security module to a security module attached to the medium of the recording medium cassette via a security module interface circuit. In the case of moving or duplicating and playing back, the security module attached to the recording medium cassette decrypts the CA information signal, compares and verifies the obtained usage conditions with the usage qualification, and satisfies the conditions. If the scramble key is supplied to the descrambler circuit, the program signal obtained by reproducing the recording medium of the recording medium cassette by the recording / reproducing circuit is descrambled by the descrambler circuit according to the scramble key. To pay Recording and reproducing method delivery. 2. The method according to claim 1, wherein the information exchange between the security module and the security module attached to the medium of the recording medium cassette uses an encryption method different from the encryption method of the received CA information of the method. Pay broadcast recording and playback method. 3. A program signal composed of video / audio and / or various data is scrambled and transmitted, and a CA information signal obtained by encrypting a program use condition and a scramble key is transmitted separately or multiplexed with the program signal. A descrambler circuit, a security module interface circuit, a security module, a recording circuit, a reproduction circuit, and two sets of a pay-broadcasting transmission method in which only a receiver satisfying the use condition can descramble the scramble key to use the program. When performing recording, the security module encrypts and decrypts the CA information signal and compares and inspects the obtained usage conditions with the usage qualification. , Scrambled if the conditions are met The program signal is recorded on the recording medium of the recording medium cassette by the recording circuit, and the encryption / decryption key and the qualification of the CA information signal of the program are transmitted from the security module to the security module attached to the medium of the recording medium cassette via the security module interface circuit. When transferring or duplicating or reproducing information, the security module attached to the recording medium cassette decrypts the CA information signal, compares and verifies the obtained usage conditions with the usage qualification, and checks the conditions. If satisfied, the program signal obtained by reproducing the recording medium of the recording medium cassette by the reproducing circuit by supplying the scramble key to the descrambler circuit.
When descrambling is performed by the descrambler circuit in accordance with the scramble key and copying is performed, the security module attached to the medium of the recording medium cassette on the reproducing side decrypts the CA information signal and uses the obtained use condition as a license. After comparison and inspection, if the conditions are satisfied, the scrambled program signal reproduced by the reproducing circuit from the recording medium of the recording medium cassette on the reproducing side is recorded by the recording circuit in the scrambled state. The CA information signal of the program is recorded on the recording medium of the recording medium cassette on the recording side and from the security module attached to the medium of the recording medium cassette on the reproducing side to the security module attached to the medium of the recording medium cassette on the recording side via the security module interface circuit. Transfer of encryption / decryption keys and credentials Is a method for recording and reproducing pay broadcasts. 4. The method according to claim 3, wherein the security module and the security module attached to the medium of the recording medium cassette and / or the security module attached to the medium of the recording medium cassette on the reproducing side and the medium attached security of the recording medium cassette on the recording side. A pay-broadcast recording / reproducing method for transmitting and receiving information between modules using an encryption method different from the encryption method of the received CA information of the method. 5. The pay broadcast recording / reproducing method according to claim 1, wherein the CA information signal is recorded on a recording medium of a recording medium cassette. 6. The pay broadcast recording / reproducing method according to claim 1, wherein the CA information signal is stored in a security module attached to a medium of a recording medium cassette. 7. A recording medium cassette provided with a recording medium for use in the pay-broadcast recording / reproducing method according to claim 1, wherein a security module including a CPU is inseparable or mounted. A recording medium cassette comprising: 8. The recording medium cassette according to claim 7, wherein the recording medium is pre-recorded with a scrambled program signal, a program use condition, and a CA information signal obtained by encrypting a scramble key. In the security module, the use qualification of the program is stored in advance, the encryption of the CA information signal is decrypted, the use condition and the use qualification of the program are checked, and if the condition is satisfied, the scramble key is output, Alternatively, a recording medium cassette having a function of transferring an encryption / decryption key of CA information signal and qualification information. 9. The recording medium cassette according to claim 7, wherein a scrambled program signal, a use condition of the program, and a CA information signal obtained by encrypting a scramble key are recorded on the recording medium, and the recorded information is stored in the security module. Has a function to store the program use qualification from the outside, and also has a function to decrypt the CA information signal, check the program use condition and use qualification, and output the scramble key when the condition is satisfied. A recording medium cassette characterized by the above-mentioned. 10. The recording medium cassette according to claim 7, wherein a scrambled program signal is pre-recorded on the recording medium, and a program use condition and a scramble key are encrypted in the security module. The CA information signal and the use qualification are stored in advance, and a function of decrypting the encryption of the CA information signal, checking the use condition and the use qualification of the program, and outputting a scramble key when the condition is satisfied is provided. Characteristic recording medium cassette. 11. The recording medium cassette according to claim 7, wherein a scrambled program signal is recorded on the recording medium, and a CA information signal obtained by encrypting a program use condition and a scramble key is recorded on the security module. And a function to externally store the qualification of use of the program, and a function of decrypting the encryption of the CA information signal, checking the use condition and qualification of the program, and outputting a scramble key when the condition is satisfied. A recording medium cassette characterized by the above-mentioned. 12. A security module used in the pay broadcast recording / reproducing method according to claim 1, wherein the security module decrypts a CA information signal, checks a use condition and a use qualification of the program, and checks the condition. A security module having a function of transferring an encryption / decryption key and qualification information of a CA information signal when satisfied. 13. A pay-broadcast recording / playback apparatus comprising a descrambler circuit, a security module interface circuit, and a recording / playback circuit used in the paybroadcast recording / playback method according to claim 1.
An apparatus for use in recording and reproducing a pay broadcast, wherein the apparatus is configured to operate together with the recording medium cassette according to any one of claims 7 to 11 and the security module according to claim 12. 14. A program signal comprising video / audio and / or various data is scrambled and transmitted, and a CA information signal obtained by encrypting a program use condition and a scramble key is transmitted separately or multiplexed with the program signal and transmitted. A personal computer device used in a pay-broadcasting transmission method in which only a recipient who satisfies usage conditions can use a program by descrambling with a scramble key, a storage function, a security module attached to a PC, a descrambling function, and an editing function. And / or a presentation function, storing a scrambled program signal in a storage function, a program use qualification in a security module attached to a PC, and storing a program information and a CA information signal in which a scramble key is encrypted. Recorded in security module attached to PC, attached to PC The security module decrypts the encryption of the CA information signal, compares and inspects the use condition and the use qualification of the program, and outputs the scramble key when the condition is satisfied, thereby performing the scramble read from the storage function. A descrambling function for descrambling the scrambled program signal in accordance with a scramble key, and then editing and / or presenting the program signal with an editing function and / or a presentation function.