> For the complete documentation index, see [llms.txt](https://help.mywallet.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.mywallet.io/intro/introduction-to-crypto-and-my-wallet/what-is-the-blockchain.md).

# What is the blockchain?

A **blockchain** is a shared database where transactions are grouped into **blocks** and linked into a **chain**. Instead of a central operator (like a bank), the network uses cryptography and consensus rules to validate and record transactions.\
Key characteristics of blockchain technology:

* **Decentralization**: No single entity controls the network
* **Transparency**: All transactions are publicly visible
* **Immutability**: Once recorded, transactions cannot be altered
* **Security**: Protected by advanced cryptographic methods
* **Consensus**: Network participants validate transactions

Thanks to blockchain technology, transaction data remains unchangeable and always available for verification. This makes blockchain particularly suitable for:

* Financial transactions
* Digital asset management
* Smart contracts
* Supply chain tracking
* Identity verification

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The TON blockchain, which **My Wallet** uses, is designed for high performance and scalability while maintaining security and decentralization.
{% endhint %}