TWI676385B - System of timestamp signature and method for using timestamp signature - Google Patents

Abstract

This case provides a time stamp signature system and a method for using the time stamp signature package. The method includes: calculating a file hash value of a file; generating a time stamp signature package including the file hash value and the file time stamp signature; and The time stamped packet is output to the blockchain system for consensus calculation, so that the time stamped packet is written into the blockchain. In addition, the method further comprises: reading the timestamp signature package from the blockchain; verifying the timestamp signature package; and when the verification result of the timestamp signature package is correct, generating a verification timestamp signature package containing the verification result; And the verification time stamp signature package is output to the blockchain system for consensus calculation, so that the verification time stamp signature package is written into the blockchain. This case uses blockchain technology to establish and verify a time stamp signature to improve the correctness of the document.

Description

Time stamp signature system and method for using time stamp signature package

This case is about the time stamp signature technology, in detail, it is about the system and method of time stamp signature creation and verification of documents using blockchain technology.

A time stamp can prove that a document already exists at a point in time and can be used to verify whether its content has been modified since it was stamped. Digital signature can link a document or transaction with the signatory. The uniqueness of the signature and document content and a valid certificate can ensure the non-repudiation of the electronic signature.

More and more laws and regulations require electronic information or documents to have time to prove. Therefore, time stamping has become an important part of public key infrastructure (PKI), which provides non-repudiation and ensures information for a long period of time in the future. Verification of correctness. In addition, the connection of time stamps and digital signatures can be used to verify the integrity of the information, and even if its signature certificate has expired, it can still ensure the correctness and validity of the document for a long time.

However, ordinary devices can hardly provide software for password calculation and PKI verification for time stamp verification, and the time stamp verification resource system needs to be confirmed by credibility, otherwise it is difficult to ensure the correctness of the verification system output verification results. have pursuasive power.

Therefore, how to propose a time-stamped visa verification technology is a subject that is currently in great need of solution.

In order to achieve the foregoing and other purposes, this case discloses a time stamp signature system and a method for using the time stamp signature.

The time stamp signature system of this case includes: a hash calculation module that calculates a file hash value of a file; a time stamp signature packet module that generates a time stamp signature package containing the hash value of the file and a time stamp signature of a file; And an output module, outputting the time stamped packet to a blockchain system for consensus calculation, so that the time stamped packet is written into a blockchain.

The time stamp signature system in this case further includes: a reading module that reads the time stamp signature package from the blockchain; and a verification module that verifies the time stamp signature package. The timestamp signature package module generates a verification timestamp signature package containing one of the verification results when the verification result of the timestamp signature package is correct, and the output module outputs the verification timestamp signature package to The blockchain system performs a consensus calculation so that the verification time stamp signature packet is written into the blockchain.

The verification module verifies the time stamped packet includes comparing a hash value of a file in the time stamped packet with a file hash value of the file, and when the comparison result matches, it indicates that the verification result is correct. In addition, the hash calculation module calculates a packet hash value of the time stamp signature packet, wherein the verification time stamp signature packet further includes the packet hash value and a packet time stamp signature.

The method of using the time stamp signature in this case includes: calculating a file hash value of one of the files; generating a time stamp including one of the file hash value and one file time stamp signature Stamp and seal the packet; and output the time stamped packet to a blockchain system for consensus calculation, so that the time stamped packet is written into a blockchain.

The method of using the time stamp signature in this case further includes: reading the time stamp signature package from the blockchain; verifying the time stamp signature package; and when the verification result of the time stamp signature package is correct, generating a package containing the time stamp signature One of the verification results is a verification time stamp signature packet; and outputting the verification time stamp signature packet to the blockchain system to perform a consensus calculation so that the verification time stamp signature packet is written into the blockchain. The verifying the timestamp signature packet includes comparing a hash value of a file in the timestamp signature packet with a hash value of the file, and when the comparison result matches, it indicates that the verification result is correct.

The method of using the time stamp signature in this case further includes: calculating a packet hash value of the time stamp signature packet, wherein the verification time stamp signature packet further includes the packet hash value and a packet time stamp signature.

The method of using the time stamp signature in this case further includes: reading the verification time stamp signature package from the blockchain; re-verifying the verification time stamp signature package; and re-verifying the verification time stamp signature package at the verification time Time, a re-verification time stamp signature packet containing one of the re-verification results is generated; and the re-verification time stamp signature packet is output to the blockchain system for consensus calculation to enable the re-verification time stamp signature packet Write to the blockchain. The verifying the verification timestamp signature packet includes: comparing the hash value of the packet in the verification timestamp signature packet with the hash value of the timestamp signature packet, and when the comparison result matches, it represents the verification. The result is correct.

Therefore, this case applies blockchain technology to time stamps and signatures, that is, the use of the blockchain's multi-point distribution of data and the difficulty of tampering to effectively prevent gold Forgery of keys and signatures. In addition, the time stamp signature system in this case reads the time stamp signature package for verification, and then writes the verification result to the blockchain. Subsequent users can confirm the time stamp signature by referring to the verification results on the blockchain. The correctness of the document, thereby confirming the correctness of the document.

2‧‧‧time stamp signature system

3‧‧‧blockchain system

21‧‧‧ hash computing module

22‧‧‧Time stamp signature packet module

23‧‧‧Output Module

24‧‧‧Read Module

25‧‧‧Verification Module

101 ~ 107, 201 ~ 207, 301 ~ 308‧‧‧

S201 ~ S204, S301 ~ S305, S401 ~ S405‧‧‧steps

Figure 1 is a schematic diagram of the time stamp signature system in the case; Figure 2A is a schematic diagram of the process of establishing a time stamp signature method using the time stamp signature method in this case; and Figure 2B is a method of the time stamp signature method in this case. The steps of establishing a time stamp signature; Figure 3A is a schematic diagram of the process of verifying the time stamp signature using the method of using the time stamp signature in the case; and Figure 3B is the verification time stamp signature of the method using the time stamp signature in the case. Figure 4A shows the flow chart of the method of re-verifying the time stamp signature of the case using the time stamp signature method; and Figure 4B shows the step of re-verifying the time stamp signature method of the case using the time stamp signature method. .

The following describes the implementation of this case through specific examples. Those skilled in the art can easily understand other advantages and effects of this case from the content disclosed herein. The structures, proportions, and sizes shown in the drawings in this specification are only used to match the content disclosed in the specification for the understanding and reading of those skilled in the art, and are not intended to limit the restrictions that can be implemented in this case. Therefore, any modification, change, or adjustment shall still fall within the scope covered by the technical content disclosed in this case, without affecting the efficacy and purpose that can be achieved in this case.

Please refer to Figure 1, which is a schematic diagram of the time stamp signature system of this case. The time stamp signature system 2 in this case includes a hash computing module 21, a time stamp signature packet module 22, an output module 23, a reading module 24, and a verification module 25.

The hash calculation module 21 calculates a file hash value of one file. The document may be a document or a certificate, and the hash value of the document represents the correctness of the document. The timestamp signature package module 22 can provide the document with the hash value of the timestamp signature, that is, the document timestamp signature, thereby generating a timestamp signature that includes the document hash value and the document timestamp signature. Packet. The output module 23 may output the time stamped packet to the blockchain system 3 to perform or accept a consensus calculation, so that the time stamped packet is written into a blockchain.

In blockchain system 3, the consensus mechanism of multiple nodes may include Proof of Work (PoW), Proof of Stack (PoS), or Delegated Proof-of-Stake; DPos). For example, proof of work can be performed to allow each node in the blockchain to participate to achieve fairness, and multiple Hash functions and Merkle Tree can be used, which not only saves storage space, but also saves the previous one by The hash value of the block is added to the new block, so that each block is interlocked to achieve the characteristics that cannot be tampered with. Based on this, the time stamped packet enters the blockchain system 3 and each node performs a consensus calculation. According to the algorithms of each consensus mechanism, it is determined which node has the right to write the time stamp signature packet on the blockchain as a new block.

The reading module 24 can read the time stamp from the blockchain of the blockchain system 3. Signed packets. The verification module 25 verifies the time stamped packet, and the verification method is: comparing the hash value of the file in the time stamped packet with the file hash value of the file calculated originally. When the comparison result matches, it represents The verification result is correct. When the verification result of the timestamp signature package is correct, the timestamp signature package module 22 can generate a verification timestamp signature package that includes one of the verification results, and the output module 23 then encapsulates the verification timestamp signature package. Output to the blockchain system 3 to perform or accept consensus calculations, causing the verification time stamp signature packet to be written into the blockchain.

In addition, the hash calculation module 21 can further calculate a packet hash value of the time stamp signature packet, for example, calculate the packet hash value according to the file time stamp signature and the file hash value in the time stamp signature packet. The time stamp signature packet module 22 can also provide the time stamp signature of the packet hash value for the time stamp signature packet, that is, the time stamp signature of the packet, thereby generating the packet hash value and the time stamp signature of the packet. The verification seal stamps the packet. Subsequently, the reading module 24 can read the verification timestamp signature packet again, and the verification module 25 can verify the verification timestamp signature packet, which is compared with the hash value of the packet in the verification timestamp signature packet. The packet hash value of the time stamp signature packet that was originally calculated. When the comparison results match, it means that the re-verification result is correct. The time stamp signature packet module 22 can generate a re-verification time stamp including the re-verification result. Signed packets.

Therefore, the time stamp signature system in this case allows the certificate file to be added to the time stamp signature mechanism without the need to apply for a certificate. In addition to maintaining the security verification procedure, the certificate issuer will also provide the verification result to the blockchain for verification. You can refer to the verification results of the blockchain without having to recalculate the verification process, simplifying the complexity of using time stamp signatures.

In addition, the method of using time stamp signature in this case can be roughly divided into three procedures: (1) establishment of time stamp signature, (2) time stamp signature verification, and (3) time stamp signature verification again.

(1) Time stamp signature establishment:

This case calculates the hash value of the certificate file through hash calculation, and generates a timestamp signature package. The timestamp signature package contains the timestamp signature and hash value. Multiple nodes in the blockchain system perform mining to check based on the hash value. The signature is correct. If the blockchain check is correct, the node will write the time stamp signature packet into the blockchain.

(2) Time stamp signature verification:

In this case, the time stamp signature package of the blockchain can be read to verify the correctness of the signature, and the time stamp signature package, verification results, and signature verification system information can be verified by the blockchain mining system and then written into the area. Block chain.

(3) Blockchain time stamp signature verification again:

Read the block information of the certificate file of the blockchain (system information such as time stamp signature package, verification result, signature verification, etc.). After the hash comparison is correct, you can sign the certificate and add the certificate file. The number of verifications, the more verification signatures accumulate, the more certification is obtained; the time stamp signature system then seals the time stamp signature package, verification results, and signature verification system information, and then verifies the information through the blockchain mining system. Write to the blockchain.

Next, the method of using the time stamp signature in this case to illustrate the establishment of the time stamp signature, the verification time stamp signature, and the re-authentication will be illustrated in Figures 2A and 2B, Figures 3A and 3B, and Figures 4A and 4B. Stamp and seal.

As shown in Figure 2A, the user applies to the time stamp signature system of this case for construction Time stamp and signature of the supporting document (block 101). In block 102, the certification document calculates a hash value through the time stamp signature system of this case (block 103), that is, the document hash value, which can represent the correctness of the transmission certification document. The timestamp signature packet module 22 generates a timestamp signature packet (block 105), which contains the hash value of the document and the timestamp signature of the hash value of the document, that is, the timestamp signature of the document. Stamp and chorus values are indicated. In block 106, multiple nodes in the blockchain system will execute consensus algorithms, such as using PoW, which can be considered as a mining system under the blockchain system. In block 107, after multiple nodes in the blockchain system perform a consensus calculation, one of the multiple nodes will have the right to write the time stamped packet to the blockchain in the blockchain system as the A new block on the blockchain.

The block flow of Figure 2A can be simplified and shown in Figure 2B. In step S201, the file hash value of the file is calculated. In step S202, a time stamp signature packet including a file hash value and a file time stamp signature is generated. In step S203, the time stamp signature packet is output to the blockchain system to perform or accept a consensus calculation. In step S204, the time stamp signature packet is written into the blockchain.

As shown in Figure 3A, the time stamp signature system in this case reads the time stamp signature package from the blockchain of the blockchain system (block 201), and the verification module 25 compares the hash of the files in the time stamp signature package. The value is the hash value of the document that was originally calculated. In block 204, a verification result is generated. The timestamp signature packet module 22 generates a timestamp signature packet (block 205), which verifies the timestamp signature packet, which contains the hash value of the packet calculated based on the hash value of the document and the timestamp signature of the document, and The time stamp signature of the hash value of the packet, that is, the time stamp signature of the packet, is shown in FIG. 3A only by the time stamp signature and the jumble value. Yu Fang In block 206, multiple nodes in the blockchain system will execute consensus algorithms, such as using PoW, which can be considered as a mining system under the blockchain system. In block 207, after multiple nodes in the blockchain system perform a consensus calculation, one of the multiple nodes will have the right to write the verification time stamp signature packet to the blockchain in the blockchain system as the A new block on the blockchain.

The block flow of Figure 3A can be simplified and shown in Figure 3B. In step S301, the time stamp signature packet is read from the blockchain. In step S302, verifying the timestamp signature packet includes comparing the hash value of the document in the timestamp signature packet to the hash value of the certification document. In step S303, a verification time stamp signature packet including a verification result is generated, which further includes a packet hash value and a packet time stamp signature calculated based on the document hash value and the document time stamp signature. In step S304, the verification time stamp signature packet is output to the blockchain system to perform or accept a consensus calculation. In step S305, the verification time stamp signature packet is written into the blockchain.

Figure 4A shows the time stamped package (including the hash value of the file and the time stamp of the file) generated by the document, which is written into the blockchain system through the consensus calculation of the mining system under the blockchain system. After the block chain, a schematic description of the verification using the time stamp signature system in this case. The timestamp signature system reads the timestamp signature package (block 301) from the blockchain for verification, and then generates a verification timestamp signature package containing the verification result (block 302 is represented by the timestamp signature package), then In block 303, multiple nodes in the blockchain system will execute a consensus algorithm, which can be regarded as a mining system under the blockchain system. In block 304, after multiple nodes in the blockchain system perform consensus calculations, one of the multiple nodes will have the right to write the verification time stamp signature packet to the area The block chain in the block chain system serves as a new block on the block chain. Thereafter, the time stamp signature system reads out the verification time stamp signature packet (block 304) from the blockchain for verification, and then produces a re-authentication time stamp signature packet containing the re-verification result (block 306 is time stamped and signed) (Packet representation), then in block 307, multiple nodes in the blockchain system will execute consensus algorithms, which can be considered as a mining system under the blockchain system. In block 308, after multiple nodes in the blockchain system perform a consensus calculation, one of the multiple nodes will have the right to write the re-verification time stamp signature packet to the blockchain in the blockchain system. As a new block on the blockchain.

The block flow of Figure 4A can be simplified and shown in Figure 4B. In step S401, the verification time stamp signature packet is read from the blockchain. In step S402, verifying the verification timestamp signature packet again includes comparing the hash value of the packet in the verification timestamp signature packet with the hash value of the timestamp signature packet. In step S403, a re-authentication time stamp signature packet containing a verification result is generated, which further includes a verification packet hash value and a verification packet time stamp signature calculated based on the packet hash value and the packet time stamp signature. In step S404, the re-verification time stamp signature packet is output to the blockchain system to perform or accept a consensus calculation. In step S405, verify that the time stamp signature packet is written into the blockchain.

In summary, this case makes use of the decentralized node characteristics of the blockchain to spread the time stamp signatures on the nodes of the multi-point device in a point-to-point manner to ensure that the time stamp signatures can be traced back and preserved for security. In addition, the verification result of the timestamp signature is written on the blockchain. The verifier only needs to query the blockchain to know the correctness of the timestamp signature. It is not necessary to re-sign and perform the verification and signature procedure to save the system. System resources and simplified operating procedures. In addition, you can trace the file modification time or have multiple timestamp signatures. Through the blockchain record, you can easily understand the sequence of file modification time.

The above-mentioned embodiments only exemplify the effectiveness of this case, and are not intended to limit this case. Anyone familiar with this technique can modify and change the above implementations without departing from the spirit and scope of this case. Therefore, the scope of protection of the rights in this case should be as listed in the scope of patent application mentioned later.

Claims (8)

A method for using a time stamp signature, including: calculating a file hash value of a file; generating a time stamp signature packet containing the file hash value and a file time stamp signature; and outputting the time stamp signature packet to a region The blockchain system performs consensus calculations so that the timestamp signature package is written into a blockchain; reads the timestamp signature package from the blockchain; verifies the timestamp signature package; When the verification result of the chapter packet is correct, a verification time stamp signature packet containing one of the verification results is generated; and the verification time stamp signature packet is output to the blockchain system for consensus calculation to make the verification time stamp signature Chapter packets are written into the blockchain. The method according to item 1 of the scope of patent application, wherein verifying the timestamp signature package includes: comparing the hash value of the file in the timestamp signature package with the hash value of the file, and when the comparison result When they match, the verification result is correct. The method described in item 1 of the scope of the patent application further comprises calculating a packet hash value of the time stamp signature packet, wherein the verification time stamp signature packet further includes the packet hash value and a packet time stamp signature. The method according to item 3 of the scope of patent application, further comprising: reading the verification timestamp signature package from the blockchain; verifying the verification timestamp signature package again; and verifying the verification timestamp signature package again When the verification result is correct, a re-verification time stamp signature packet containing one of the re-verification results is generated; and the re-verification time stamp signature packet is output to the blockchain system for consensus calculation to make the re-verification time stamp The signature packet is written into the blockchain. The method according to item 4 of the scope of patent application, wherein verifying the verification timestamp signature packet includes: comparing a hash value of the packet in the verification timestamp signature packet with a packet hash value of the timestamp signature packet, Among them, when the comparison results match, it means that the verification result is correct. A time stamp signature system includes: a hash calculation module that calculates a file hash value of a file; a time stamp signature packet module that generates a time stamp signature package that includes the file hash value and a file time stamp signature; The output module outputs the time stamped packet to a blockchain system for consensus calculation, so that the time stamped packet is written into a blockchain; the reading module reads from the blockchain The timestamp signature package; and a verification module to verify the timestamp signature package, wherein the timestamp signature package module generates one of the verification results when the verification result of the timestamp signature package is correct The verification time stamp signature packet is output by the output module to the blockchain system for consensus calculation, so that the verification time stamp signature packet is written into the blockchain. The time stamp signature system described in item 6 of the scope of patent application, wherein the verification module verifies that the time stamp signature packet contains a hash value of the file in the time stamp signature packet and the file hash value of the file. , Where when the results match, it means that the verification result is correct. The time stamp signature system described in item 6 of the scope of patent application, wherein the hash calculation module calculates a packet hash value of the time stamp signature packet, wherein the verification time stamp signature packet further includes the packet hash value. And a package time stamped.