What kind of technology
are we using?


A blockchain – originally block chain – is a continuously growing list of records, called blocks, which are linked and secured using cryptography. Each block contains typically a hash pointer as a link to a previous block, a timestamp and transaction data.

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By design, blockchains are inherently resistant to modification of the data. Functionally, a blockchain can serve as “an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way. For use as a distributed ledger a blockchain is typically managed by a peer-to-peer network collectively adhering to a protocol for validating new blocks.


Once recorded, the data in any given block cannot be altered retroactively without the alteration of all subsequent blocks and a collusion of the network majority.

Blockchains are secure by design and are an example of a distributed computing system with high Byzantine fault tolerance. Decentralized consensus has therefore been achieved with a blockchain. This makes blockchains potentially suitable for the recording of events, medical records, and other records management activities, such as identity management, transaction processing, documenting provenance, or food traceability.


The first distributed blockchain was conceptualized by Satoshi Nakamoto in 2008 and implemented the following year as a core component of the digital currency bitcoin, where it serves as the public ledger for all transactions. The invention of the blockchain for bitcoin made it the first digital currency to solve the double spending problem, without the use of a trusted authority or central server. The bitcoin design has been the inspiration for other applications.

The Ledger Leopard

The ledger leopard platform is an API’s based solution based on Ethereum, which makes it easy for developers and companies to work with the added values of Blockchain technology without having to start from scratch.

– The chain.

The ledger leopard chain consists of a network of distributed nodes. You can also run our nodes in your own private network.

– Authorization / authentication.

The ledger leopard authorization/authentication is designed to connect and create to your own user management.

– Mining.

For mining, we use the concept of Proof of Authority as an algorithm which delivers instant transactions and seamless consensus over a truly distributed network.

– API layer.

We created an API layer with different rest API’s to integrate the different Blockchain functions in your application.