A blockchain, or chain of blocks, is a technology for storing and transmitting information without a control organ. Technically, it is a distributed database whose information sent by the users and the internal links to the database are checked and grouped at regular time intervals in blocks, the whole being secured by cryptography, and thus forming chain.

The Blockchain's technology is currently very slow and very greedy in terms of electrical energy given the computing power required for * mining: blockchain block certification.

The "  green blockchain  " will differentiate itself from current blockchains by implementing a new certification technology that is much faster, scalable and non-energy efficient.

Each individual becomes the "minor" of his own transaction which is recorded in the blockchain.

The green blockchain will provide the following functions:

- trusted third party.

- financial intermediary.

- safe.

- consistency check.

- encryption.

- accounting register.

- archiving