Blockchain is a technology that allows for the secure storage and transfer of information. It consists of blocks of data linked together chronologically. Each block contains information about the transactions made since the previous block. Blockchain is a transparent and immutable technology, making it particularly interesting for financial applications and digital contracts.
What principle does blockchain rely on?
Blockchain relies on a consensus principle. For a transaction to be validated, it must be approved by the majority of the nodes in the network. Once a transaction is validated, it is recorded in a data block and linked to the previous blocks, making the chain of blocks immutable.
Why is blockchain secure?
Blockchain is secure due to its distributed architecture. In fact, the blockchain is stored on multiple nodes in the network, making it impossible for a single person to alter it. Additionally, blockchain is transparent, allowing for easy verification of transaction validity.
What is the difference between blockchain and cryptography?
Blockchain is a technology for storing and transferring information. Cryptography is a technique for encrypting data. Blockchain uses cryptography to secure transactions and make them immutable.