> For the complete documentation index, see [llms.txt](/llms.txt).

This module explains how users interact with blockchains through cryptographic key pairs and wallet software.

## Public/Private Keys

:::info
For a more detailed guide on this topic, see [Private Keys and Public Keys](/developers/blockchain-essentials/browser/#private-keys-and-public-keys).
:::

Every user interacts with a blockchain through a cryptographic key pair:

- **Private Key:** A secret number used to sign transactions.
- **Public Key:** Derived from the private key.
- **Address:** A shortened, user-friendly representation of the public key.

Transactions are "signed" using the private key, proving ownership without revealing the key itself.

### How Keys Work Together

```text
Private Key (secret)
      ↓
Public Key (derived)
      ↓
Address (shortened for use)
```

:::warning[Keep Your Private Key Safe]
Anyone with access to your private key can control your funds. Never share it or store it in plaintext.
:::

## Wallets

A wallet is a tool (software or hardware) that:

- Stores your private key
- Signs transactions
- Generates addresses

### Types of Wallets

| Wallet Type       | Description                      | Examples             |
| ----------------- | -------------------------------- | -------------------- |
| Browser Extension | Runs in your browser             | MetaMask, Rabby      |
| Hardware Wallet   | Physical device for cold storage | Ledger, Trezor       |
| Mobile Wallet     | App on your phone                | Trust Wallet         |
| Web Wallet        | Accessed via browser             | Rootstock Web Wallet |

### Recommended Wallets for Rootstock

For a list of recommended wallets and setup guides, see the [Wallets](/dev-tools/wallets/) section.

## Summary

Before moving forward, ensure you understand:

- The relationship between private keys, public keys, and addresses
- How transaction signing works
- Different wallet types and their trade-offs

**Next:** [Understanding Gas and Transactions](/developers/blockchain-essentials/new-to-blockchain/gas-transactions/)