> For the complete documentation index, see [llms.txt](https://wiki.4thtech.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.4thtech.io/sdk/ethereum/encryptor/computesharedsecretkey.md).

# computeSharedSecretKey

Computes a shared secret key with the provided public key.

### Usage

```ts
const userPublicKey = '0x...';
const sharedSecretKey = await encryptor.computeSharedSecretKey(userPublicKey);
```

### Returns

`Promise<string | undefined>`

A promise that resolves to the computed shared secret key or undefined if the computation failed.

### Parameters

#### publicKey

* **Type** `string`

The public key with which the shared secret key is computed.


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