---
title: Combining parameters to generate a signature for SKAdNetwork 1
framework: storekit
role: article
role_heading: Article
path: storekit/combining-parameters-to-generate-a-signature-for-skadnetwork-1
---

# Combining parameters to generate a signature for SKAdNetwork 1

Generate signatures for apps compiled with earlier SDKs.

## Overview

Overview Generate a signature using the parameters for version 1.0 if you compile your app with an iOS SDK version from 11.3 through 13.7. To generate the signature, first combine the values of Ad network install-validation keys for the version 1.0. The parameters required for a version 1.0 signature are: Combine the parameters for version 1.0 Create the UTF-8 string for version 1.0 if you compile your app with an SDK prior to iOS 14. important: You must use lowercase for the string representation of the nonce: SKStoreProductParameterAdNetworkNonce. Combine the values into a UTF-8 string with an invisible separator (‘\u2063’) between them, in the exact order shown: ad-network-id + '\u2063' + campaign-id + '\u2063' + itunes-item-id + '\u2063' + nonce + '\u2063' + timestamp

Next, follow the instructions to sign the combined string, encode the signature, and use the generated signature string as described in Generating the signature to validate StoreKit-rendered ads.

## See Also

### Signatures for SKAdNetwork 1, 2, and 2.2–3

- [Combining parameters to generate signatures for SKAdNetwork 2.2 and 3](storekit/combining-parameters-to-generate-signatures-for-skadnetwork-2-2-and-3.md)
- [Combining parameters to generate a signature for SKAdNetwork 2](storekit/combining-parameters-to-generate-a-signature-for-skadnetwork-2.md)