The Hedera Hashgraph is an advanced blockchain infrastructure that enables the no-trust authenticity requirements for Hyperstack.A blockchain is a decentralized database for storing data or digital documents, while guaranteeing their inviolability and durability. The storage of Digital Credentials on a blockchain allows access to them anywhere and at any time, without any constraints.The holders of digital diplomas recorded on the blockchain can share their Digital Credentials with any entity using a simple URL link. These entities, whether universities, companies, state institutions or other bodies, have the assurance that submitted Digital Credentials are completely authentic, since nothing stored on a blockchain can be altered. With the use of blockchain technology, trust is guaranteed ! As long as the issuer of the Digital Credentials is recognized as reliable, the veracity of the documents stored on the blockchain cannot be questioned, nor can the word of the holder of the credentials.