An eSealing dApp

At a glance

This tutorial introduces the eSealing dApp on Concordium, where files can be sealed and timestamped on the blockchain to prove possession and integrity. After reading this overview, you will understand the concept of file sealing and timestamping and be ready to explore the eSealing dApp.

In this tutorial, you are going to get familiar with the deployed eSealing smart contract on testnet and explore the associated website.

What is file sealing? What is timestamping?

Seals are used to protect items that should not be tampered with. You can prove an item’s origin and integrity after it has been timestamped on the blockchain. Timestamping is a blockchain-based verification and fraud protection process that assures the authenticity of a document. If you seal and timestamp a file, you can prove that it was in your possession at the sealing time and the file has not been changed since then.