DE102020113302A1 - System and method for authenticating audiovisual units - Google Patents

Abstract

A system (100) for authenticating audiovisual units is provided, comprising a recording device (101) which has a recording sensor device (102) for recording an audiovisual unit and a data transmission device (104) that can be connected to a cloud computing service (103) , and an authenticity server (105) which has an authentication module (106) and a blockchain management module (107) and is provided via the cloud computing service (103). The data transmission device (104) is designed to transmit the audiovisual unit during recording by the recording sensor device (102) via the cloud computing service (103) to the authenticity server (105), which is the authentication module (106) of the authenticity server (105) designed to check the transmitted audiovisual unit for at least one authenticity criterion and the blockchain management module (107) of the authenticity server (105) is designed to add representation values of parts of the audiovisual unit checked to a blockchain (110). The blockchain management module (107) is set up to add the representation values of the audiovisual unit checked in a plurality of representation value units each comprising at least one of the representation values as transaction data from own blocks (111) to the blockchain (110).

Description

The present invention relates to a system for authenticating audiovisual units, a suitable method for authenticating audiovisual units with which such a system can be operated, and a computer program product.

Audiovisual units are, for example, pictures, e.g. B. Photos, but also image sequences, d. H. Videos, as well as audio recordings. These are now mostly in digital form and are available for everyone by recording devices of mobile devices, such. B. Smartphones, which have photo and video camera and audio recording functions, can be mass-produced. However, the digital representation not only allows copying without loss of quality, but also the manipulation of image, video and audio recordings, which can also change their content or create completely new content. This is problematic wherever the authenticity of the audiovisual units is required. This is the case, for example, in journalism, when z. B. the credibility of a report depends on the fact that the image, video and / or audio recordings used are actually at a specified location, at a specified time or by a specific person, e.g. B. the reporter himself, were created and no subsequent changes were made to the content. Ensuring the authorship and the rights to the audiovisual unit is closely linked to the guaranteed authenticity. The assured authenticity of an audiovisual unit can also be important in other contexts, for example as evidence in court, in sales that are only to be made on the basis of photos or videos of the object of sale, or in documenting the condition of an object in insurance cases.

In the US 10 095 877 B2 a system for authenticating photos is shown, in which a captured photo is sent to an authentication server, where it is combined with metadata such as time and location information and provided with a watermark and can be accessed via a web address. In the US 10 361 866 B1 shows that a blockchain can be used to ensure the authenticity of a photo more reliably by generating a first hash value from a photo taken and transmitting the photo with the first hash value and a first time stamp to a server, which has this hash value and time stamp a blockchain, generates a second hash value from the received photo in the same way and also adds it to the blockchain with a second time stamp, whereby the identity of the two hash values and a small time difference between the time stamps should ensure that the photo has not been tampered with.

In this way, the possibility of manipulation can be reduced, but not excluded. For this, it would preferably also have to be ensured, for example, that the hash values cannot already be generated from manipulated images, that the time offset between the two time stamps actually does not allow any manipulation or exchange of the transmitted data and that the image to which the hash values saved in the blockchain are assigned , is not changed after the hash values have been generated. In addition, the generation of a hash value using a selected coding method for representing an image allows a suitably modified image to generate the same hash value with knowledge of the selected method.

It is therefore an object of the present invention to provide a possibility of enabling, in a simple manner, the authentication of audiovisual units such as images, image sequences and audio sequences with increased reliability.

This object is achieved according to the invention with a system for authenticating audiovisual units according to claim 1 and a method for authenticating audiovisual units according to claim 14 and a computer program product according to claim 18.

According to a first aspect of the invention, a system for authenticating audio-visual units comprises a recording device which has a recording sensor device for recording an audio-visual unit and a data transmission device that can be connected to a cloud computing service, and an authenticity server which has an authentication module and a blockchain management module and is provided via the cloud computing service. The data transmission device is designed to transmit the audiovisual unit when recording by the recording sensor device via the cloud computing service to the authenticity server, the authentication module of the authenticity server is designed to check the transmitted audiovisual unit for at least one authenticity criterion and the blockchain management module of the authenticity server is designed to add representation values of parts of the audiovisual unit checked to a blockchain. The blockchain management module is set up to store the representation values of the audiovisual unit checked in a plurality of at least one of the To add representation value units comprising representation values as transaction data from own blocks to the blockchain.

The system is used to authenticate audiovisual units recorded with the recording device, i. H. Image, video and / or audio recordings, therefore, ensure that the respective audiovisual unit made available later via the system corresponds exactly to the originally recorded one and could not be manipulated unnoticed, i.e. changed or exchanged.

The recording device comprises on the one hand the actual recording sensor device, for example a camera sensor and / or an audio sensor, i. H. a microphone and, on the other hand, a data transmission device, for example a programmable device with a data transmission interface, in particular for wireless data transmission over a data network. It can be provided that the data transmission device transforms the data to be transmitted into a suitable representation, for example suitably encoded or compressed. The recording device is, for example, a mobile terminal, e.g. B. a smartphone, or another digital photo or video camera with an integrated data transmission device or a data transmission device that can be connected as an additional device via a provided interface.

A cloud computing service provides information technology data processing infrastructure means via a data network, in particular the Internet, as a service, for example storage space, computing power and / or certain user software, for which the cloud computing service on one or more data processing infrastructure devices in the form of computers, data processing systems or other programmable devices with processor and memory is executed that have one or more connections to at least one data network via a network interface via which the cloud computing service can be accessed and via which the cloud computing service can, for example, from it Allows running programs to access the data network. The cloud computing service may have restricted access.

The system according to the invention provides that an authenticity server is provided via a cloud computing service, to which the data transmission device connects via the cloud computing service, so that when the audiovisual unit is recorded, its data is immediately used for authentication or storage ensured authenticity are sent to the authenticity server. Without logging on to the cloud computing service and an existing data connection for the immediate transmission of the recorded audiovisual unit, there can be no authenticated storage by the authenticity server in the cloud. In one embodiment, the cloud computing service itself can also belong to the system.

The authenticity server enables authenticated audiovisual units to be provided. To this end, it is ensured, on the one hand, that only authenticated data are stored by the authenticity server and that the authenticated stored data are no longer subsequently changed unnoticed, so that the authenticity of the data remains guaranteed. For this purpose, the authenticity server comprises the authentication module and the blockchain management module.

At least one authenticity criterion is checked with the authentication module. Several criteria are preferably checked. Depending on the embodiment and recorded audiovisual unit to be saved, a suitable algorithm is used to check, for example, in the case of images and image sequences, i.e. videos, whether they are computer-generated images or recordings of two-dimensional photographs or screen views or recordings of a real three-dimensional environment Time of admission. For this purpose, for example, analyzes of the frequency spectrum of the image or video can be carried out. As an authenticity criterion, for example, the plausibility of image content with regard to the recording with transmitted metadata can also be checked. Were location information, e.g. B. recorded with a global position data acquisition system, transmitted, the plausibility of the lighting conditions at the corresponding time of day at the location can be checked for outdoor recordings using a time stamp of the time of the day, and based on, for example, geographic information available via an electronic map and content analysis of the sent audiovisual Unit and position information, the plausibility of the position information can be checked.

After successful authentication, representation values of shares, e.g. B. pixels, stored in the audiovisual unit by adding them to a blockchain by the blockchain management module of the authenticity server. Portions of a digital image can in particular be, for example, pixels, ie image points, their representation values being e.g. B. PCM-coded (PCM - Pulse Code Modulation) representations of the brightness and possibly also color values of the pixels, but also other representations, for example difference values of DPCM-coded pixels (DPCM - Difference PCM). Components of audio sequences are, for example, their sample values, representation values can also, for example, also contain their PCM or DPCM representations. The representation values of the parts of the audiovisual unit to be stored in the blockchain are either generated during the recording and transmitted to the authenticity server. Or the representation values can also only be generated in the authenticity server by transforming or coding the recorded values into a format that is particularly suitable for authentication or storage. The representation values together represent a representation of the audiovisual unit that corresponds to it or that can be recovered from the representation values using suitable methods, preferably without loss, possibly also with a loss of quality that is considered permissible. In the case of an image, for example, a representation value can correspond directly to a PCM or DPCM value of a pixel, but also to a transformation coefficient of a frequency transformed of the image. A hash value, on the other hand, is not a representation value, because even if it uniquely identifies the audiovisual unit, it is not possible to recover the audiovisual unit from the hash value.

The storage is done by the blockchain management module adding the representation values of a blockchain. A blockchain is a continuously expandable list of chained blocks, i. H. Records. Each block contains a cryptographically secure hash value of the previous block as well as a time stamp and user data to be secured, known as transaction data.

It is not possible to generate a single hash value representing the audiovisual unit and instead of several representation value units to add only one unit with the one hash value of the audiovisual unit to the blockchain.

The system according to the invention provides that the blockchain management module does not add the representation values as a whole as a common unit in a single block of the blockchain, but in several representation value units, each of which contains at least one representation value. In this way it is ensured that each representation value unit of representation values of the audiovisual unit checked can be stored securely against unnoticed manipulation. If each representation value unit includes exactly one representation value, each representation value, for example each individual pixel of a recorded image, is secured with its own block of the blockchain. This ensures that even if the blockchain is changed in order to change even one pixel of the image, this can be recognized with pixel accuracy.

In addition, if, for example, an image to be authenticated on the basis of an authenticated image in the blockchain is compared with this authenticated image, the representation value units can be identified with absolute reliability that may not be authentic in the image to be authenticated. If the representation values correspond directly to pixels, the area can also be recognized visually. If each representation value stands for a pixel and a representation value unit contains exactly one representation value, i.e. if each pixel is secured by its own entry in the blockchain, the possibly inauthentic area can be determined with pixel accuracy.

In a preferred embodiment the audiovisual unit comprises an image. The system can thus be an important tool for strengthening the credibility of news and reports published in electronic information media, for example. In connection with images that are intended to illustrate facts or events, media consumers pay much more attention and assign credibility to them than without. B. on the Internet, however, sometimes also "fake news", i. H. False news with manipulated image content is distributed in order to influence the media consumer. In this way, manipulations of the image content are possible, which cannot be recognized by the viewer without knowledge of the original image, but which can change the meaning of the image at will. It is therefore important for serious news media to be able to verifiably ensure the authenticity of the images that journalists offer for use in reports that are to be published. The system according to the invention ensures that only authentic images are saved and, if necessary, in the case of a manipulated image, the representation value units in which the manipulation took place can also be recognized.

The same applies to a further embodiment in which the audiovisual unit comprises an image sequence, i. H. includes a video. For example, so-called “deepfake” manipulations can be detected and their spread prevented. “Deepfakes” are manipulations in which realistic-looking image sequences are generated using artificial intelligence techniques, the content of which has been modified or falsified.

In yet another embodiment, the audiovisual unit comprises an audio sequence. Audio sequences can also be manipulated and z. For example, using characteristic parameters of a person's voice, a deepfake audio sequence can be generated in which a person's words are manipulated. The one to be protected from manipulation An audiovisual unit can in particular also be an image sequence with an associated audio sequence.

In an exemplary embodiment in which the audiovisual unit comprises an image and / or an image sequence, the representation values represent image points or pixels of the audiovisual unit. In other words, a separate representation value, for example a PCM value or a DPCM value, is stored for each pixel, so that in particular lossless coding, e.g. B. a lossless JPEG coding of the image can be used. In addition, if each representation value is clearly related to an associated pixel, a change or deviation in an image compared with an authenticated image, the position of the changed area can be detected directly, possibly also directly visually by the viewer of the image or the image sequence.

In another embodiment, the representation values represent transformation coefficients from a frequency transformation of the audiovisual unit. This can be any frequency transformation, for example a discrete cosine transformation, Fourier transformation or any other frequency transformation of sample values of an audio sequence or pixel blocks of an image. For example, an image can be subjected to lossy JPEG encoding. This has the advantage that the amount of data to be stored in the blockchain is significantly reduced. If the transformation is already being carried out by the recording device, the data rate to be transmitted to the authenticity server is also reduced. The possibility of direct pixel-precise localization of possibly manipulated image areas is dispensed with.

In a preferred embodiment, the representation value units of the plurality of representation value units each include exactly one representation value. This means that for each of the representation values, the blockchain management module of the authenticity server generates a separate block with the respective representation value as transaction data and adds it to the blockchain. In this way, the authenticity of each individual representational value is verifiably guaranteed. If, in a particularly preferred embodiment, a representation value represents a pixel, each individual pixel is authenticated and, if necessary, manipulation can be localized with pixel accuracy.

In a further embodiment, the plurality of representation value units each comprises a plurality of adjacent representation values. This makes it possible to reduce the number of blockchain entries for each audiovisual unit while still allowing a desired degree of assignability to areas of the audiovisual unit, for example to lines or pixel blocks of a desired size in the case of an image.

In one embodiment, the blockchain is uniquely assigned to a user of the system and the blockchain management module is set up to add representation values to the blockchain only when the data transmission device for transmitting the audiovisual unit via the cloud computing service transmits an authentication of this user. That is, the blockchain is private and the blockchain management module only adds blocks of the authenticated user to the blockchain. Depending on the embodiment, the authentication can take place, for example, by means of an identifier, access data and / or a personal key with which the data of the recorded audiovisual unit is encrypted during the transmission. In this way, for. B. In addition to the authenticity of the representational values of the audiovisual units stored in the blockchain, their authorship can also be secured.

In a further embodiment, the blockchain management module is also set up to add metadata assigned to the audiovisual unit checked to the blockchain. Metadata can e.g. B. additionally taken into account for authentication of the audiovisual unit, for example the geographical position information of the location of the recording, a local time stamp that was generated by the recording device, but also information on a coding used, etc.

In a preferred embodiment, the metadata also relate at least to rights to the audiovisual unit. For example, the metadata can include an identification of the user of the recording device as proof of the authorship of the audiovisual unit. In particular, the metadata can also include information on the author's agreements on the rights to the audiovisual unit and their evaluation or use, for example about the employer or client for whom the audiovisual unit was recorded. B. the publisher, news broadcaster, etc. These metadata remain permanently connected to the audiovisual unit, even if the user, d. H. the originator of the audiovisual unit later adds further audiovisual units to his blockchain for other clients.

In a preferred embodiment, the metadata also identify at least one or more other users of the system and the authenticity server is set up to make copies to send, i.e. transmit, updates of the blockchain to the one or more other users. A separate authenticity server with a respective different blockchain management module can be provided for each user, which manages a blockchain assigned to the respective user. In addition, the other blockchain management module stores copies of sent blockchains. In order to verify a blockchain, information contained in the blockchain as metadata can therefore be used to determine which other users have received copies of the blockchain, on the basis of which the integrity of the blockchain can also be verified later. For example, the cloud computing service can only be open to a certain selection of users for storing their recorded audiovisual units in their assigned blockchains. B. Employees of a certain company or a selection of journalists classified as trustworthy by publishers or similar. Depending on the embodiment, from this trustworthy group of other users, a random selection or a selection made by the client or also a selection made by the author of the audiovisual unit is permanently linked to the unit secured in the blockchain. Instead of several authenticity servers, which in one embodiment also belong to the system, a single authenticity server can also be provided, which manages the blockchains of several users separately.

In one embodiment, the authenticity server is set up to generate a uniform resource indicator (URL) for the audiovisual element, the call of which prompts the authenticity server to read out the representation values for the audiovisual element from the blockchain. The uniform resource indicator can be, for example, a link with the aid of which the associated authenticated audiovisual element can be queried via a website or app.

According to a second aspect of the invention, a method for authenticating audio-visual units with a system according to the first aspect of the invention comprises connecting a data transmission device of a recording device to a cloud computing service, recording an audio-visual unit with a recording sensor device of the recording device, and transmitting the audiovisual unit when recording by the recording sensor device via the cloud computing service to an authenticity server provided via the cloud computing service, checking the transmitted audiovisual unit for at least one authenticity criterion with an authentication module of the authenticity server, and if the checking of the authenticity of the audiovisual unit confirmed, addition of representation values of portions of the audited audiovisual unit to a blockchain by a blockchain management module of the authenticity server, wherein the representation values of the audiovisual unit checked are added to the blockchain as transaction data from own blocks in a plurality of representation value units each comprising at least one of the representation values. In this way, the advantages and special features of the system according to the invention for authenticating audiovisual units are also implemented within the framework of a suitable method. The method can be an at least partially computer-implemented method.

In one embodiment, the method also includes adding metadata associated with the audiovisual unit being checked to the blockchain by the blockchain management module.

In an exemplary embodiment of the method, the metadata also identify at least one or more other users of the system, the method then also comprising sending copies of updates to the blockchain to the one or more other users. In this way, a group of other users is defined and connected to the stored audiovisual unit, so that the blockchain entries of the audiovisual unit can also be verified later at any time using the copies stored there.

In a preferred embodiment, the method comprises subjectively authenticating the audiovisual element checked by the one or more other users of the system and adding a respective subjective authentication result to the blockchains assigned to the one or more other users. In the blockchain to which the representation values of the audiovisual unit have been added, it is stated which other users should also subjectively authenticate them, and it can be checked in the respective blockchains of the selected other users whether they actually carried out a subjective authentication.

According to a third aspect of the invention, a computer program product comprises code portions for executing steps of a method for authenticating audiovisual units according to the second aspect of the invention when they are executed on a programmable device of a system for authenticating audiovisual units according to the first aspect of the invention. The advantages and special features of the method according to the invention for authenticating audiovisual units are thus also implemented in the context of a suitable computer program product.

Programmable devices of the system for authenticating audiovisual units according to the first aspect of the invention include in particular the recording device and data processing infrastructure devices that execute the cloud computing service via which the authenticity server is provided. The code components for providing the functionality of the authenticity server and for setting up the recording device can be provided in one or more computer program products.

• 1 eine schematische Darstellung eines erfindungsgemäßen Systems zum Authentifizieren von audiovisuellen Einheiten in einer beispielhaften Ausgestaltung; und
• 2 eine schematische Darstellung eines erfindungsgemäßen Verfahrens zum Authentifizieren von audiovisuellen Einheiten in einer beispielhaften Ausgestaltung.

Further advantages of the present invention can be seen from the detailed description and the figures. The invention is explained in more detail below in connection with the following description of exemplary embodiments with reference to the accompanying figures. Show it:

• 1 a schematic representation of a system according to the invention for authenticating audiovisual units in an exemplary embodiment; and
• 2 a schematic representation of a method according to the invention for authenticating audiovisual units in an exemplary embodiment.

It goes without saying that other embodiments can be used and structural or logical changes can be made without departing from the scope of protection of the present invention. It goes without saying that the features of the various exemplary embodiments described above and below can be combined with one another, unless specifically stated otherwise. The description is therefore not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.

In 1 is a schematic representation of a system according to the invention 100 for authenticating audiovisual units shown in an exemplary embodiment. The system 100 comprises a receiving device 101 that have a recording sensor device 102 for recording an audiovisual unit and one with a cloud computing service 103 connectable data transmission device 104 having.

The system 100 also includes an authenticity server 105 . This has an authentication module 106 and a blockchain management module 107 on. The authenticity server 105 will be through the cloud computing service 103 provided, the information technology data processing infrastructure means via a data network 108 makes available. When the audiovisual unit, e.g. B. a photo, ie an image, with the recording sensor device 102 the receiving device 101 , for example the camera function of a mobile terminal, e.g. B. a smartphone or another camera with data transmission device, is recorded, the audio-visual unit of the data transmission device 104 when recording by the recording sensor device 102 via the cloud computing service 103 to the authenticity server 105 transfer. The authenticity server 105 receives the transmitted audiovisual unit and with the authentication module 106 of the authenticity server 105 the transmitted audiovisual unit is checked for at least one authenticity criterion. In the embodiment shown, it is provided, for example, to transmit photos and at least check whether the transmitted photo is a photo of a real three-dimensional environment or a photo of a two-dimensional image. For this purpose, the authentication module carries out a suitable analysis, which typically includes image transformation and analysis in the frequency domain.

If the authentication is successful, the transmitted audiovisual unit is stored in a storage device 109 in a blockchain 110 secured. In the embodiment shown, the blockchain management module 107 To do this, when a photo is received, the photo is first encoded or transformed into a DPCM representation, e.g. B. by lossless, ie lossless JPEG coding with a suitable encoder, so that the pixels of the photo are represented by DPCM values. In another embodiment, the lossless JPEG encoding is already done by the recording device 101 performed before the transfer.

The blockchain management module 107 of the authenticity server 105 is designed to transfer representation values of parts of the audiovisual unit checked to the blockchain 110 to add. The blockchain 110 is one of the blockchain management module 107 continuously expandable list of interlinked blocks 111 , ie records. Every block 111 contains, in addition to a cryptographically secure hash value of the previous block and a time stamp, transaction data to be secured, which here contain the representation value units.

In the example described, the proportions of the audiovisual unit correspond to the pixels of the Photos and the representative values z. B. DPCM values as coefficients of a lossless JPEG coding. The blockchain management module 107 is set up to store the representation values in a plurality of representation value units each comprising at least one of the representation values as transaction data from own blocks 111 to the blockchain 110 to add. It is preferably provided that a representation value unit comprises exactly one representation value, ie it is provided that a representation value exists for each pixel and each individual one of these representation values is in a separate block 111 the blockchain 110 will be added.

In the in 1 The embodiment shown is provided that the blockchain 110 a user of the system who is the user of the recording device 101 is uniquely assigned. The blockchain management module is set up to only provide representation values for the blockchain 110 add if the data transmission facility 104 for transmitting the audiovisual unit via the cloud computing service 103 transmits an authentication of this user. In the example shown is the cloud computing service 103 restricted access. The user of the recording device 101 is a registered user of the cloud computing service 103 registered and a transmission of the recorded audiovisual unit from the data transmission device 104 the receiving device 101 is only possible if there is an access management unit 112 of the cloud computing service 103 from the data transmission device 104 verified user credentials.

The blockchain management module 107 is also set up in the embodiment shown, to the blockchain 110 also to add blocks that contain metadata assigned to the audiovisual unit checked, in particular also metadata that includes at least one or more other users of the system 100 identify. Every other user has their own different recording device 113 , each with an associated other recording sensor device 114 and other data transmission equipment 115 has, and the other audiovisual units recorded therewith are sent to a different authenticity server assigned in each case 116 transferred to a different authentication module 117 and other blockchain management module 118 has the other blocks 119 to another blockchain 120 of the other user who is in a different storage device 121 is stored. In other exemplary embodiments, it can be provided, for example, that only one common authenticity server or one common blockchain management module is used, which manages the various blockchains.

In the exemplary embodiment shown, the authenticity server is 105 set up copies of updates to the blockchain 110 to the one or more other users. This means that the copies are sent to the respective other blockchain management module 118 transferred and from this in the other storage device 121 are stored, which is therefore a verification of the blockchain 110 available copy of the blockchain 110 ' contains. Likewise, the storage device 109 a copy of the other blockchain 120 ' contain.

In order to be able to access the stored audiovisual units and check their authenticity, one is using the cloud computing service 103 over the data network 108 connectable user interface device 122 provided and the authenticity server 105 is set up for in the blockchain 110 Generate stored audiovisual elements uniform resource indicators, when the authenticity server is called 105 the representation values for the respective audiovisual elements from the blockchain 110 read out. The uniform resource indicators are z. B. Links provided by the user interface device 122 can be integrated into a webpage display, with photos, for example, being displayed directly. It can e.g. For example, it can be provided that checking the authenticity of one of the photos displayed can be triggered by pressing a switch provided, clicking on a faded in logo or the like, whereupon the integrity of the blockchain containing the photo to be checked is checked and, if necessary, deviations are displayed.

In 2 is a schematic representation of a method according to the invention 200 for authenticating audiovisual units shown in an exemplary embodiment. The method begins in a starting state 201 . Then a connection takes place first 202 a data transmission device of a recording device with a cloud computing service.

Then there is a recording 203 an audiovisual unit with a recording sensor device of the recording device and a transmission 204 the audiovisual unit when recording 203 by the recording sensor device via the cloud computing service to an authenticity server provided via the cloud computing service.

There is a check 205 of the transmitted audiovisual unit to at least one Authenticity criterion with an authentication module of the authenticity server. When checking 205 does not confirm the authenticity of the audiovisual unit (in 2 marked by a "-"), the process ends in a final state 211 because audiovisual units that are unsuccessful in authentication cannot be saved.

When checking 205 confirms the authenticity of the audiovisual unit (in 2 marked with a "+"), an addition takes place 206 of representation values of parts of the audiovisual unit checked to a blockchain by a blockchain management module of the authenticity server. The addition 206 can include, first of all, if necessary, generating representation values suitable for storage from the portions of the transmitted audiovisual unit by coding or transformation. The representation values of the audiovisual unit checked are added to the blockchain as transaction data from their own blocks in a plurality of representation value units each comprising at least one of the representation values.

In the exemplary embodiment shown, it is additionally provided that the method 200 also an add 207 comprises metadata assigned by the audiovisual unit checked to the blockchain by the blockchain management module, the metadata also identifying at least one or more other users of the system, and that the method 200 also a sending 208 of copies of updates to the blockchain to the one or more other users.

In the in 2 The embodiment shown is also a further step, a subjective authentication 209 of the audited audiovisual element by the one or more other users of the system and adding 210 of a respective subjective authentication result for each of the blockchains assigned to one or more other users.

This ensures that only audiovisual units authenticated by the authentication module are stored in the blockchain. B. by visual assessment of a photo or video, the result of which is also stored in the blockchain. In addition, the authenticity of the stored audiovisual element is then checked on the basis of a check of the integrity, i. E. H. the unchanged, the stored blockchain possible. If each representation value has been added to the blockchain in its own block, if there is a change or manipulation it can be recognized exactly which representation values have been changed.

The method ends in a final state 211 .

The figures are not necessarily true to detail and true to scale and can be enlarged or reduced in order to provide a better overview. The functional details disclosed here are therefore not to be understood as restrictive, but merely as an illustrative basis which offers the person skilled in the art in this field of technology guidance in order to use the present invention in a wide variety of ways.

Unless otherwise stated, terms such as “other” or the like were only used (for example user / other user, receiving device / other receiving device, etc.) in order to distinguish between the respective elements. The use of the terms therefore does not imply any qualitative or other prioritization of one or the other element.

It goes without saying that method steps, although described in accordance with a certain ordered sequence, could in part be carried out in a different sequence than that described here. It will also be understood that certain steps could be performed simultaneously, that other steps could be added, or that certain steps described herein could be omitted. In other words, the descriptions herein are provided for the purpose of illustrating particular embodiments and should not be construed as limiting the subject matter disclosed.

The term "and / or" as used herein, when used in a series of two or more items, means that any of the listed items can be used alone, or any combination of two or more of the listed items can be used. For example, if a composition is described that it contains components A, B and / or C, the composition A alone; B alone; C alone; A and B in combination; A and C in combination; B and C in combination; or A, B, and C in combination.

Although the invention has been illustrated and described in more detail by the preferred exemplary embodiments, the invention is not restricted by the disclosed examples and other variations can be derived therefrom by the person skilled in the art without departing from the scope of protection of the invention. The invention is therefore not intended to apply to individual Embodiments are limited only by the appended claims.

List of reference symbols

100

System for authenticating audiovisual units

101

Cradle

102

Pick-up sensor device

103

Cloud computing service

104

Data transmission device

105

Authenticity server

106

Authentication module

107

Blockchain management module

108

Data network

109

Storage facility

110

Blockchain

110 '

Copy of the blockchain

111

block

112

Access management unit

113

other receiving device

114

other pick-up sensor device

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other data transmission facility

116

other authenticity server

117

another authentication module

118

another blockchain management module

119

other block

120

other blockchain

120 '

Copy of the other blockchain

121

Storage facility

122

User interface device

200

Method for authenticating audiovisual units

201

Starting state

202

Connect to cloud computing service

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Record an audiovisual unit

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Transferred to authenticity server

205

Check for authenticity criterion

206

Adding to a blockchain

207

Adding metadata to the blockchain

208

Sending copies of updates to the blockchain

209

subjective authentication

210

Adding a subjective authentication result

211

Final state

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• US 10095877 B2 [0003]
• US 10361866 B1 [0003]

Claims (18)

A system (100) for authenticating audiovisual units, comprising - a recording device (101) which has a recording sensor device (102) for recording an audiovisual unit and a data transmission device (104) that can be connected to a cloud computing service (103), and - An authenticity server (105) which has an authentication module (106) and a blockchain management module (107) and is provided via the cloud computing service (103), wherein - the data transmission device (104) is designed to transmit the audiovisual unit when recording by the recording sensor device (102) via the cloud computing service (103) to the authenticity server (105), - The authentication module (106) of the authenticity server (105) is designed to check the transmitted audiovisual unit for at least one authenticity criterion and - The blockchain management module (107) of the authenticity server (105) is designed to add representation values of parts of the audiovisual unit checked to a blockchain (110), the blockchain management module (107) being set up to add the representation values of the audiovisual unit checked in a plurality of representation value units each comprising at least one of the representation values as transaction data from own blocks (111) to the blockchain (110). System according to Claim 1 wherein the audiovisual unit comprises an image. System according to Claim 1 or Claim 2 wherein the audiovisual unit comprises a sequence of images. A system according to any one of the preceding claims, wherein the audiovisual unit comprises an audio sequence. System according to one of the Claims 1 until 3 , the representation values representing pixels of the audiovisual unit. System according to one of the Claims 1 until 4th , wherein the representation values represent transformation coefficients from a frequency transformation of the audiovisual unit. System according to one of the preceding claims, wherein the plurality of representation value units each comprise exactly one representation value. System according to one of the Claims 1 until 6th wherein the plurality of representation value units each comprises a plurality of adjacent representation values. System according to one of the preceding claims, wherein the blockchain (110) is uniquely assigned to a user of the system (100) and the blockchain management module (107) is set up to only add representation values to the blockchain (110) if the data transmission device ( 104) for transmitting the audiovisual unit via the cloud computing service (103) transmits an authentication of this user. System according to one of the preceding claims, wherein the blockchain management module (107) is also set up to add metadata assigned to the audiovisual unit checked to the blockchain (110). System according to Claim 10 , whereby the metadata at least also relate to rights to the audiovisual unit. System according to Claim 10 or Claim 11 , wherein the metadata also identify at least one or more other users of the system (100) and the authenticity server (105) is set up to send copies of updates to the blockchain (110) to the one or more other users. System according to one of the preceding claims, wherein the authenticity server (105) is set up to generate a uniform resource indicator for the audiovisual element, with the call of which the authenticity server (105) is caused to extract the representation values for the audiovisual element from the blockchain (110). read out. Method (200) for authenticating audiovisual units with a system according to one of the Claims 1 until 13th comprising - connecting (202) a data transmission device of a recording device to a cloud computing service; - Recording (203) of an audiovisual unit with a recording sensor device of the recording device; - Transmission (204) of the audiovisual unit during recording (203) by the recording sensor device via the cloud computing service to an authenticity server provided via the cloud computing service; - Checking (205) the transmitted audiovisual unit for at least one authenticity criterion with an authentication module of the Authenticity server; and if the checking (205) confirms the authenticity of the audiovisual unit, adding (206) representation values of portions of the audiovisual unit checked to a blockchain by a blockchain management module of the authenticity server, the representation values of the audiovisual unit checked in a plurality of each at least one of the representation value units comprising representation values are added to the blockchain as transaction data from own blocks. Procedure according to Claim 14 , also comprising - adding (207) metadata associated with the audited audiovisual unit to the blockchain by the blockchain management module. Procedure according to Claim 15 wherein the metadata also at least identify one or more other users of the system, the method further comprising sending (208) copies of updates to the blockchain to the one or more other users. Procedure according to Claim 16 , also comprising - subjectively authenticating (209) the audiovisual element checked by the one or more other users of the system and - adding (210) a respective subjective authentication result to the respective blockchains assigned to the one or more other users. Computer program product, the code portions for carrying out steps of a method (200) for authenticating audiovisual units according to one of the Claims 14 until 17th comprises, when on a programmable device, a system (100) for authenticating audiovisual units according to one of the Claims 1 until 13th are executed.

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