CN112733089B - Movie key distribution management method, movie key distribution management device, computer equipment and storage medium - Google Patents
Movie key distribution management method, movie key distribution management device, computer equipment and storage medium Download PDFInfo
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- 238000007726 management method Methods 0.000 title claims abstract description 34
- 238000003860 storage Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 26
- 238000004590 computer program Methods 0.000 claims description 15
- 238000005516 engineering process Methods 0.000 claims description 7
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- 230000005540 biological transmission Effects 0.000 description 2
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- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
Abstract
The invention relates to a movie key distribution management method, a movie key distribution management device, computer equipment and a storage medium; the method comprises the following steps: encrypting the movie information and digitally signing the encrypted movie information; decrypting the digital signature to obtain the encrypted movie information, and then decrypting the encrypted movie information to obtain the movie information; and arranging the movies on shelves according to the movie information. The invention greatly enhances the safety, the non-forgeability and the non-tamper property of the data, reduces the errors caused by manual operation, reduces the possibility that the digital hard disk is leaked or cracked after being copied in the transportation process and greatly reduces the transportation cost.
Description
Technical Field
The present invention relates to the technical field of movie key distribution services, and more particularly, to a movie key distribution management method, apparatus, computer device, and storage medium.
Background
Before a large movie is shown, a cinema operator needs to log in a middle number, manually search corresponding movies by a China or KDM platform and select different movie keys for downloading aiming at showing types (such as 2D/3D/IMAX and the like) of different movie halls, before the movie operator needs to enter the middle number, manually input movie hall information by the China or KDM platform, bind certificates of movie playing devices (such as showing servers and the like) and the like, in the operation process, links of inputting movie hall information, binding certificates of the movie playing devices, matching and downloading of movie keys and the like are independent operation modules, generally, the keys/certificates are manually searched and matched, the possibility of downloading errors exists after searching and downloading, and the keys which are selected and downloaded by different movie players corresponding to different showing types of different movie halls/different movie playing devices are different, however, each independent operation module is correlated with each other, and a link fault necessarily causes the whole link to be blocked; therefore, the traditional operation method is complicated and the manual operation errors are frequent, so that the cinema operation efficiency is low, in addition, after the cinema operators finally match and download the keys, a movie distributor needs to mail the digital hard disk of the movie offline to a movie city, the movie playing equipment calls and decrypts the movie keys after the digital hard disk is linked to the movie playing equipment in the movie city, the movie playing equipment reads the movie information in the digital hard disk and shows the movie after the completion of the operation, and the movie key information is easy to leak or be broken after being copied after the download of the movie keys and the mailing of the movie digital hard disk, so that the pirated movie which is not shown flows out, the income of a movie box house is influenced, and the requirements cannot be met.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a movie key distribution management method, a movie key distribution management device, a movie key distribution management computer device and a storage medium.
In order to achieve the purpose, the invention adopts the following technical scheme:
the movie key distribution management method comprises the following steps:
encrypting the movie information and digitally signing the encrypted movie information;
decrypting the digital signature to obtain the encrypted movie information, and then decrypting the encrypted movie information to obtain the movie information;
and arranging the movies on shelves according to the movie information.
The further technical scheme is as follows: in the step of encrypting the movie information and digitally signing the encrypted movie information, a movie issuer encrypts the movie information by using a public key of a movie playing device and digitally signs the encrypted movie information by using a private key of the movie issuer; in the step of decrypting the digital signature to obtain the encrypted movie information and then decrypting the encrypted movie information to obtain the movie information, the movie playing device decrypts the digital signature by using the public key of the movie distributor, and simultaneously decrypts the encrypted movie information by using the private key of the movie playing device to obtain the movie information.
The further technical scheme is as follows: the movie information includes: movie showing time information, showing period information, showing type information, digital movie information, and movie hall information.
The further technical scheme is as follows: after the step of arranging the movies on shelves according to the movie information, the method further comprises the following steps: and arranging the films after the films are placed on the shelf, and synchronizing the film arrangement information to the network ticketing platform.
A movie key distribution management apparatus comprising: an encryption unit, a decryption unit, and an arrangement unit;
the encryption unit is used for encrypting the movie information and digitally signing the encrypted movie information;
the decryption unit is used for decrypting the digital signature to obtain the encrypted movie information and then decrypting the encrypted movie information to obtain the movie information;
and the arrangement unit is used for arranging the movies on shelves according to the movie information.
The further technical scheme is as follows: in the encryption unit, a movie distributor encrypts movie information by adopting a public key of a movie playing device and digitally signs the encrypted movie information by using a private key of the movie distributor; in the decryption unit, the movie playing device decrypts the digital signature by using the public key of the movie distributor, and simultaneously decrypts the encrypted movie information by using the private key of the movie playing device to obtain the movie information.
The further technical scheme is as follows: the movie information includes: movie showing time information, showing period information, showing type information, digital movie information, and movie hall information.
The further technical scheme is as follows: further comprising: and the film arranging synchronization unit is used for arranging the films after the films are placed on the shelf and synchronizing the film arranging information to the network ticketing platform.
A computer device comprising a memory having stored thereon a computer program and a processor that, when executed, implements a movie key distribution management method as described above.
A storage medium storing a computer program comprising program instructions which, when executed by a processor, implement the movie key distribution management method as described above.
Compared with the prior art, the invention has the beneficial effects that: the data security, the unforgeability and the unforgeability of the data are greatly enhanced, errors caused by manual operation are reduced, the possibility that the digital hard disk is leaked or cracked after being copied in the transportation process is reduced, the transportation cost is greatly reduced, and the requirements can be better met.
The invention is further described below with reference to the accompanying drawings and specific embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flowchart of a movie key distribution management method according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of a movie key distribution management apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic block diagram of a computer device provided by an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to the embodiments shown in fig. 1 to fig. 3, wherein, referring to fig. 1, the present invention discloses a movie key distribution management method, which includes the following steps:
s1, encrypting the movie information and digitally signing the encrypted movie information;
in this embodiment, the movie distributor encrypts the movie information by using the public key of the movie playback device, and digitally signs the encrypted movie information by using its own private key.
Wherein the movie information includes: movie showing time information, showing period information, showing type information, digital movie information, and movie hall information.
Before the step of S1, the method further includes: the method comprises the steps of presetting the deployment of film key distribution and management on cinemas and film distributors, and providing corresponding interfaces for the film distributors, a film ticketing system, a third-party network ticketing platform and the like; the digital/Chinese/KDM, film distributor and film ticket system provides clear film showing time, showing period, showing type, digital film and other information, writes corresponding data and forms film information.
S2, decrypting the digital signature to obtain the encrypted movie information, and then decrypting the encrypted movie information to obtain the movie information;
in this embodiment, the movie playback device decrypts the digital signature using the public key of the movie issuer, and decrypts the encrypted movie information using its own private key to obtain the movie information.
And S3, arranging the movies on shelves according to the movie information.
The movie theater information is written into movie information through records in the movie ticketing system, after the movie information is decrypted, each movie theater and a serial number certificate of a corresponding movie playing device are automatically checked and bound through an interface, after each movie theater and the corresponding movie playing device are bound, the movie ticketing system reads the decrypted movie information, puts on the shelf of movies according to movie information rules, and manages showing schedule and the like of the movies.
The movie ticket selling system comprises movie broadcasting equipment, movie broadcasting servers deployed in movie halls, and the movie broadcasting servers are provided with unique equipment serial numbers, movie hall information of the movie ticket selling system is written into movie information and is decrypted, and through interfaces, each movie hall and a corresponding movie broadcasting equipment serial number certificate are automatically verified and bound.
After the step of S3, the method further includes: arranging the films after being put on the shelf, and synchronizing the film arranging information to a third-party network ticket selling platform; the third-party network ticketing platform acquires the film scheduling information, puts the film on the shelf and sells the film ticket for audiences; the audience makes the consumption purchase of the movie ticket in the third-party network ticket selling platform.
Wherein, the film information is compiled and formulated by several parties such as the middle number/China/KDM, the film distributor and the like by adopting the block chain technology, the information such as the film showing time, the showing period, the showing type, the digital film content and the like is determined, the film information containing the digital film content is deployed on the block chain, the film distributor is allowed to transmit the information and the data containing the digital film content to the film playing equipment of the cinema through an interface to automatically carry out the encryption and decryption of a key and automatically execute the showing rule and a strategy, the original traditional mode that the encrypted digital film hard disk/copy is mailed to the cinema by offline mailing is replaced, and then the digital film hard disk is linked to the film playing equipment by the cinema to carry out the encryption and decryption is adopted, the possibility that the digital hard disk is leaked or cracked after being copied in the transportation process is greatly reduced, and the transportation cost is greatly reduced.
The block chain adopts RSA asymmetric encryption, once the RSA asymmetric encryption technology taking the block chain as a bottom-layer technical environment is deployed on the block chain, all block network nodes are linked together in an RSA asymmetric encryption mechanism mode, so that block data cannot be tampered, even if the database of one node is tampered, the databases of other nodes need to be tampered together, otherwise, the databases of other nodes cannot be influenced, and the safety, the unforgeability and the unforgeability of the data are greatly enhanced. After the movie information is deployed on the block chain, the consistency of distributed recording and distributed storage of the block network nodes can be ensured, all modules which are operated independently are converted into the block network nodes and form an end-to-end decentralized network system together, and verification, storage, maintenance and transmission of block data are realized by using a mathematical algorithm based on an established consensus mechanism, so that all the block network nodes can be freely linked and exchange data, assets, information and the like, and errors caused by manual operation are reduced.
In the prior art, because the key is downloaded as an independent operation module, after the key is downloaded, an issuer needs to post the encrypted digital movie hard disk/copy to a cinema by way of offline post, and then the cinema links the digital movie hard disk to a movie playing device for encryption and decryption, in the process, there is a time difference between the post of the key and the post of the digital movie hard disk to the cinema, and the possibility of disclosure or cracking after copying can also exist in the transportation process of the digital movie hard disk to the cinema, thereby increasing the probability of the exposure of the movie key, and further increasing the possibility of the copy and cracking of the movie key and the digital movie hard disk, while the traditional way of posting the digital movie hard disk is replaced by an intelligent contract (movie information) by applying the RSA asymmetric encryption technology with a block chain as a bottom technical environment, and through the chain structure of the block chain, in the process of issuing the key and encrypting the intelligent contract by the issuer, the movie playing equipment used by the cinema can timely and accurately receive information and decrypt the corresponding intelligent contract, so as to realize real-time information/data transmission and encryption and decryption of the intelligent contract.
Referring to fig. 2, the present invention also discloses a movie key distribution management apparatus, including: an encryption unit 10, a decryption unit 20, and an arrangement unit 30;
the encryption unit 10 is used for encrypting the movie information and digitally signing the encrypted movie information;
the decryption unit 20 is configured to decrypt the digital signature to obtain the encrypted movie information, and then decrypt the encrypted movie information to obtain the movie information;
the arranging unit 30 is used for arranging movies on shelves according to the movie information.
In the encryption unit 10, a movie distributor encrypts movie information by using a public key of a movie playing device, and digitally signs the encrypted movie information by using a private key of the movie distributor; in the decryption unit 20, the movie playback device decrypts the digital signature using the public key of the movie issuer, and at the same time, decrypts the encrypted movie information using its own private key to obtain the movie information.
Wherein the movie information includes: movie showing time information, showing period information, showing type information, digital movie information, and movie hall information.
Wherein, the device still includes: and the film arranging synchronization unit 40 is used for arranging the films after the films are placed on the shelves and synchronizing the film arranging information to the network ticketing platform.
It should be noted that, as can be clearly understood by those skilled in the art, the detailed implementation process of the foregoing movie key distribution management apparatus and each unit may refer to the corresponding description in the foregoing method embodiment, and for convenience and brevity of description, no further description is provided herein.
The above-described movie key distribution management apparatus may be implemented in the form of a computer program that can be run on a computer device as shown in fig. 3.
Referring to fig. 3, fig. 3 is a schematic block diagram of a computer device according to an embodiment of the present application; the computer device 500 may be a terminal or a server, where the terminal may be an electronic device with a communication function, such as a smart phone, a tablet computer, a notebook computer, a desktop computer, a personal digital assistant, and a wearable device. The server may be an independent server or a server cluster composed of a plurality of servers.
Referring to fig. 3, the computer device 500 includes a processor 502, memory, and a network interface 505 connected by a system bus 501, where the memory may include a non-volatile storage medium 503 and an internal memory 504.
The non-volatile storage medium 503 may store an operating system 5031 and a computer program 5032. The computer program 5032 comprises program instructions that, when executed, cause the processor 502 to perform a movie key distribution management method.
The processor 502 is used to provide computing and control capabilities to support the operation of the overall computer device 500.
The internal memory 504 provides an environment for running the computer program 5032 in the nonvolatile storage medium 503, and when the computer program 5032 is executed by the processor 502, the processor 502 may be caused to execute a movie key distribution management method.
The network interface 505 is used for network communication with other devices. Those skilled in the art will appreciate that the configuration shown in fig. 3 is a block diagram of only a portion of the configuration associated with the present application and does not constitute a limitation of the computer device 500 to which the present application may be applied, and that a particular computer device 500 may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
It should be understood that in the embodiment of the present Application, the Processor 502 may be a Central Processing Unit (CPU), and the Processor 502 may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and the like. Wherein a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
It will be understood by those skilled in the art that all or part of the flow of the method implementing the above embodiments may be implemented by a computer program instructing associated hardware. The computer program includes program instructions, and the computer program may be stored in a storage medium, which is a computer-readable storage medium. The program instructions are executed by at least one processor in the computer system to implement the flow steps of the embodiments of the method described above.
Accordingly, the present invention also provides a storage medium. The storage medium may be a computer-readable storage medium. The storage medium stores a computer program, wherein the computer program comprises program instructions that, when executed by a processor, can implement the above-described movie key distribution management method.
The storage medium may be a usb disk, a removable hard disk, a Read-Only Memory (ROM), a magnetic disk, or an optical disk, which can store various computer readable storage media.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative. For example, the division of each unit is only one logic function division, and there may be another division manner in actual implementation. For example, various elements or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented.
The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs. The units in the device of the embodiment of the invention can be merged, divided and deleted according to actual needs. In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a storage medium. Based on such understanding, the technical solution of the present invention essentially or partially contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a terminal, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention.
The technical contents of the present invention are further illustrated by the examples only for the convenience of the reader, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation based on the present invention is protected by the present invention. The protection scope of the invention is subject to the claims.
Claims (8)
1. A movie key distribution management method, characterized by comprising the steps of:
encrypting the movie information and digitally signing the encrypted movie information;
decrypting the digital signature to obtain the encrypted movie information, and then decrypting the encrypted movie information to obtain the movie information;
arranging movies on shelves according to the movie information;
the movie information includes: movie showing time information, showing period information, showing type information, digital movie information, and movie hall information;
the movie theater information is written into movie information through records in the movie ticketing system, after the movie information is decrypted, each movie theater and a serial number certificate of a movie playing device corresponding to the movie theater are automatically checked and bound through an interface, after each movie theater and the movie playing device are correspondingly bound, the movie ticketing system reads the decrypted movie information, puts on the shelf of movies according to movie information rules, and manages showing schedule of the movies;
the movie distributor encrypts movie information by adopting a public key of movie playing equipment and digitally signs the encrypted movie information by using a private key of the movie distributor;
before the step of encrypting the movie information and digitally signing the encrypted movie information, the method further comprises: the method comprises the steps of presetting the deployment of film key distribution and management on a cinema and a film distributor, simultaneously providing corresponding interfaces for the film distributor, a film ticketing system and a third-party network ticketing platform, providing clear film showing time, showing period, showing type and digital film information, writing corresponding data and forming film information;
the movie ticket selling system comprises movie broadcasting equipment, movie broadcasting servers deployed in movie halls, and movie broadcasting servers, wherein the movie broadcasting servers have unique equipment serial numbers, movie hall information of the movie ticket selling system is written into movie information and is decrypted, and each movie hall and a corresponding movie broadcasting equipment serial number certificate of the movie hall are automatically checked and bound through an interface;
the method comprises the steps that film information is jointly compiled and formulated by adopting a block chain technology, the film showing time, the showing period, the showing type and the digital film content information are determined, the film information containing the digital film content is deployed on the block chain, a film distributor is allowed to transmit the information and data containing the digital film content to film playing equipment of a cinema through an interface to automatically encrypt and decrypt a key and automatically execute showing rules and strategies, and the original traditional mode that an encrypted digital film hard disk/copy is mailed to the cinema by offline mailing and then the digital film hard disk is linked to the film playing equipment by the cinema to encrypt and decrypt is replaced; the block chain adopts RSA asymmetric encryption, once the RSA asymmetric encryption technology taking the block chain as a bottom technical environment is deployed on the block chain, all block network nodes are linked together in an RSA asymmetric encryption mechanism mode, so that block data cannot be tampered, even if a database of one node is tampered, databases of other nodes need to be tampered together, otherwise, databases of other nodes cannot be influenced And exchanging assets and information.
2. The movie key distribution management method according to claim 1, wherein in the step of encrypting the movie information and digitally signing the encrypted movie information, the movie issuer encrypts the movie information using a public key of a movie playback device and digitally signs the encrypted movie information using its own private key; in the step of decrypting the digital signature to obtain the encrypted movie information and then decrypting the encrypted movie information to obtain the movie information, the movie playing device decrypts the digital signature by using the public key of the movie distributor, and simultaneously decrypts the encrypted movie information by using the private key of the movie playing device to obtain the movie information.
3. The movie key distribution management method according to claim 1, wherein after the step of arranging movies for shelving based on the movie information, the method further comprises: and arranging the films after the films are placed on the shelf, and synchronizing the film arrangement information to the network ticketing platform.
4. A movie key distribution management apparatus, comprising: an encryption unit, a decryption unit, and an arrangement unit;
the encryption unit is used for encrypting the movie information and digitally signing the encrypted movie information;
the decryption unit is used for decrypting the digital signature to obtain the encrypted movie information and then decrypting the encrypted movie information to obtain the movie information;
the arrangement unit is used for arranging the movies on shelves according to the movie information;
the movie information includes: movie showing time information, showing period information, showing type information, digital movie information, and movie hall information;
the movie theater information is written into movie information through records in the movie ticketing system, after the movie information is decrypted, each movie theater and a serial number certificate of a movie playing device corresponding to the movie theater are automatically checked and bound through an interface, after each movie theater and the movie playing device are correspondingly bound, the movie ticketing system reads the decrypted movie information, puts on the shelf of movies according to movie information rules, and manages showing schedule of the movies;
the movie distributor encrypts movie information by adopting a public key of movie playing equipment and digitally signs the encrypted movie information by using a private key of the movie distributor;
wherein, still include: the method comprises the steps of presetting the deployment of film key distribution and management on a cinema and a film distributor, simultaneously providing corresponding interfaces for the film distributor, a film ticketing system and a third-party network ticketing platform, providing clear film showing time, showing period, showing type and digital film information, writing corresponding data and forming film information;
the movie ticket selling system comprises movie broadcasting equipment, movie broadcasting servers deployed in movie halls, and movie broadcasting servers, wherein the movie broadcasting servers have unique equipment serial numbers, movie hall information of the movie ticket selling system is written into movie information and is decrypted, and each movie hall and a corresponding movie broadcasting equipment serial number certificate of the movie hall are automatically checked and bound through an interface;
the method comprises the steps that film information is jointly compiled and formulated by adopting a block chain technology, the film showing time, the showing period, the showing type and the digital film content information are determined, the film information containing the digital film content is deployed on the block chain, a film distributor is allowed to transmit the information and data containing the digital film content to film playing equipment of a cinema through an interface to automatically encrypt and decrypt a key and automatically execute showing rules and strategies, and the original traditional mode that an encrypted digital film hard disk/copy is mailed to the cinema by offline mailing and then the digital film hard disk is linked to the film playing equipment by the cinema to encrypt and decrypt is replaced; the block chain adopts RSA asymmetric encryption, once the RSA asymmetric encryption technology taking the block chain as a bottom technical environment is deployed on the block chain, all block network nodes are linked together in an RSA asymmetric encryption mechanism mode, so that block data cannot be tampered, even if a database of one node is tampered, databases of other nodes need to be tampered together, otherwise, databases of other nodes cannot be influenced And exchanging assets and information.
5. The movie key distribution management apparatus according to claim 4, wherein in the encryption unit, the movie distributor encrypts the movie information using a public key of a movie playback device, and digitally signs the encrypted movie information using its own private key; in the decryption unit, the movie playing device decrypts the digital signature by using the public key of the movie distributor, and simultaneously decrypts the encrypted movie information by using the private key of the movie playing device to obtain the movie information.
6. The movie key distribution management apparatus according to claim 4, further comprising: and the film arranging synchronization unit is used for arranging the films after the films are placed on the shelf and synchronizing the film arranging information to the network ticketing platform.
7. A computer device, characterized in that the computer device comprises a memory on which a computer program is stored and a processor that implements the movie key distribution management method according to any one of claims 1-3 when the computer program is executed by the processor.
8. A storage medium characterized in that the storage medium stores a computer program comprising program instructions that, when executed by a processor, can implement the movie key distribution management method according to any one of claims 1 to 3.
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