[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [local‑first/LocalAuth](https://evolu.dev/docs/api-reference/common/local-first/LocalAuth) › StorageBackend

```ts
type StorageBackend =
  | "keychain"
  | "androidKeystore"
  | "encryptedSharedPreferences";
```

Defined in: [packages/common/src/local-first/LocalAuth.ts:449](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/local-first/LocalAuth.ts#L449)

Enumerates the native storage backend used to persist sensitive data.