1. Public and private keys are assigned to the account of the person entering the information, and the data is recorded to the blockchain after the signature of the person entering the information has been verified.
2. Furthermore, the data entered into the blockchain can be verified by PoE (proof of existence) to ensure that it has not been altered since the point of record.
The above two factors mean that the information recorded on the Tracified platform is highly credible.
Proof of Existence (PoE) Mechanism
PoE is the most basic of blockchain-based proofs. It compares the current data displayed with the blockchain data to see if they match. The existence of the currently displayed data from the time of the recorded timestamp can be confirmed and proved if a match is found. If they do not match, it can be assumed that the data has been altered at some point.
How to check PoE
The PoE can be easily checked on the screen displaying the information by following the steps below.
1. Displaying data recorded on the blockchain.
In the top right-hand corner of the screen, where the traceability is displayed, click the ‘Prove it’ button. Only data stored on the blockchain is highlighted by a bright glow.
2. Check Location (ID) on the Blockchain
A pop-up will appear if you click or touch the brightly highlighted area. The type of proof (Blockchain Proofs) and the name of the person who entered the data is displayed in the pop-up.
Touch the ‘PoE’ section of Blockchain Proofs or the Blockchain Proofs tab at the top to see the blockchain location where the data was recorded (indicated by a value called Transaction ID), and copy this value.
To proceed, tap ‘Visit Tillit Explorer.’
3. Learn more about Tillit Explorer.
Tillit Explorer is a blockchain browser that allows you to view the data stored in the blockchain. To access the Tillit Explorer page, touch ‘View Tillit Explorer.’
Copy the transaction ID and paste it into the search window. As a search result, the data for the relevant ID is displayed.
To view the content associated with the relevant transaction ID, touch ‘View Item. In addition, click the ‘PoE’ button under ‘Available Proofs.’
To learn more about PoE, click the ‘PoE’ button.
The data recorded in the blockchain (Hash value from Blockchain) is compared to the data displayed on the screen in this step (Hash value from Tracifed).
The values compared are matched if the words ‘HASHES MATCHED’ are displayed, and the data on the display screen can be proven to be data that has existed since the time of recording (PoE).
In practice, before being recorded on the blockchain, the input data is converted into a value known as a hash value, so the data is compared here with the hash value.
The data displayed on the traceability display screen is shown in the item ‘Transaction Data’ below the center of the screen. This data is used to calculating the ‘Hash value from Tracified.’
‘Hash value from Blockchain,’ on the other hand, displays the hash value that has been recorded in the blockchain (using the Stellar blockchain)
This page compares and displays the automatically calculated results, but if you want to validate the PoE yourself, try the method described in the ‘Get it validated by yourself’ section at the top right of the screen.
