[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Type](https://evolu.dev/docs/api-reference/common/Type) › Mnemonic

```ts
type Mnemonic = string &
  Brand<"Trimmed"> &
  Brand<"MinLength1"> &
  Brand<"Mnemonic">;
```

Defined in: [packages/common/src/Type.ts:1469](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/Type.ts#L1469)

The mnemonic, also known as a "seed phrase," is a set of 12 words in a
specific order chosen from a predefined list (BIP39). It provides a
human-readable way to store a private key securely. The mnemonic is generated
safely on the user's device using cryptographically secure random number
generation, ensuring it remains private and unique.