Long-term cloud-based blockchain certificate device

Abstract

We provide a blockchain registration and verification support device that allows even ordinary users to easily perform long-term storage of digital information and prove its authenticity simultaneously. [Solution] The blockchain registration and verification support device comprises a user terminal, a cloud, and a blockchain. Digital information, including images, audio, video, and text data, may be difficult to store long-term or verify its authenticity due to user terminal failure, loss, physical damage, or termination of cloud services. In this invention, the main data of the digital information acquired from the user terminal is stored in a dedicated cloud, and only the hash value of the main data is registered on the blockchain. This allows the blockchain to be used as an external verification base to verify the existence of the data and whether or not it has been tampered with at the time of registration.

Description

Technical Field

[0001] The present invention relates to the proof and long-term storage of digital data. In particular, the hash value of digital data obtained from a user terminal is recorded on a blockchain and maintained in a state where tampering and deletion are substantially difficult, and the main body of the digital data is stored in a dedicated cloud, thereby achieving both provability and long-term reproducibility. The present invention relates to a long-term cloud storage type blockchain proof device.

Background Art

[0002] In recent years, digital data such as images, voices, videos, texts, PDFs, etc. generated and obtained by smartphones, tablet terminals, and personal computers has been rapidly increasing. On the other hand, these digital data may easily disappear due to terminal failures, incorrect operations, cloud service failures, external attacks, account losses, etc. Also, when relying on storage on an external PC or the like, there is a problem that it is difficult to avoid data loss due to terminal breakage or loss. In addition, conventional proof methods that rely on third-party institutions such as electronic signatures and time stamps are not sufficient from the viewpoints of tamper resistance, persistence, and reliability. In recent years, data proof methods using blockchain technology with high tamper resistance have attracted attention.

[0003] In this field, for example, the technology described in Patent Document 1 (Utility Model Registration No. 3253775) is known, and means for ensuring the provability of digital data have been proposed. However, in the technology of Patent Document 1, it cannot be said that sufficient consideration has been given to the long-term storage of digital data and the restorability in the event of a failure. In particular, while separating the storage means of the data main body and the proof means that is difficult to tamper with, a configuration that ensures both in cooperation with each other including long-term reproducibility has not been achieved. Furthermore, while blockchain has high tamper resistance, it is not practical to directly store the data main body due to constraints such as capacity, speed, and cost, and a technology that simultaneously enables the proof and long-term storage of digital data has been demanded. [Prior art documents]

[0004] [Patent Document 1] Utility Model Registration No. 3253775 [Overview of the project] [Problems that the invention aims to solve]

[0005] Traditional digital data storage methods have faced the problem of data being easily lost due to terminal failures, user errors, external cloud service failures / account loss, and damage to external PCs. Furthermore, conventional proof methods have limitations in terms of tamper resistance and permanence. In addition, storing data on a blockchain has constraints in terms of capacity, speed, and cost. Therefore, there was no mechanism that could simultaneously achieve "proof that data is tamper-proof" and "long-term retrievable storage" for digital data. [Means for solving the problem]

[0006] This invention provides a configuration in which digital data such as images, audio, video, text, and PDFs acquired on a user terminal are stored in a dedicated cloud via bidirectional communication, and only the hash value generated from the data is registered and stored on a blockchain. This adopts a two-system structure that separates the data used for verification and the data used for storage. This ensures both the detection of tampering using hash values ​​and the recovery of the main data in the dedicated cloud, even in the event of terminal failure, external cloud failure, or damage to an external PC. [Effects of the Invention]

[0007] According to this invention, by employing a two-system structure in which the main data of digital information is stored in a dedicated cloud and the hash value generated from that data is registered and stored on a blockchain, even if a failure occurs in the user terminal, external cloud, or external PC, the hash value as proof information will continue to be stored on the blockchain, and the main data will be restored from the dedicated cloud. As a result, digital information is preserved in a state where it is virtually impossible to tamper with or delete it after the fact, and long-term reproducibility and proof reliability can be stably ensured. [Brief explanation of the drawing]

[0008] [Figure 1] This is a block diagram illustrating the outline of the digital information storage and certification structure according to the present invention, showing the bidirectional communication relationship between the user terminal, dedicated cloud, blockchain, external cloud, and external PC. [Modes for carrying out the invention]

[0009] The blockchain registration and certification support device of this invention comprises a user terminal, a dedicated cloud, and a blockchain. The user terminal has the function of acquiring digital information such as images, audio, video, text, and PDFs, and sending and receiving the data to the dedicated cloud via bidirectional communication. Furthermore, the user terminal generates a hash value from the device data, communicates bidirectionally with the blockchain, and enables registration, reference, and verification of the hash value. The dedicated cloud has a storage area for long-term retention of the device data and enables restoration by returning the data upon request from the user terminal. [Examples]

[0010] In Example 1, digital data such as photos, videos, audio, text, and PDFs are acquired on the user's terminal, and this data is transmitted to a dedicated cloud for long-term storage. The user's terminal generates a hash value from the data and registers it on the blockchain, thereby ensuring that the existence information of the data is difficult to tamper with and virtually impossible to delete afterward. Even if data on the device is lost due to device failure or other reasons, users can restore the data from a dedicated cloud service, and the authenticity of the restored data is verified by comparing it with the hash value stored on the blockchain. This invention is not limited to images, but can be similarly applied to various types of digital information such as audio, text, and PDFs, enabling long-term storage, restoration, and authenticity verification regardless of the data type.

Claims

[Claim 1] A long-term cloud-based blockchain certificate device characterized by having a configuration that records hash values ​​generated from digital data on a blockchain, maintains them in a state where subsequent tampering and deletion are substantially difficult, and stores the actual digital data in a dedicated cloud, and that a user terminal can send and receive the hash values ​​and the actual data bidirectionally between the blockchain and the dedicated cloud.

Images