---
title: SKStoreProductParameterAdNetworkAttributionSignature
framework: storekit
role: symbol
role_heading: Global Variable
path: storekit/skstoreproductparameteradnetworkattributionsignature
---

# SKStoreProductParameterAdNetworkAttributionSignature

The key that represents the advertising network’s cryptographic signature to use for install validation.

## Declaration

```swift
let SKStoreProductParameterAdNetworkAttributionSignature: String
```

## Mentioned in

Generating the signature to validate StoreKit-rendered ads Signing and providing ads

## Discussion

Discussion The value for this key is an NSString. The ad network creates the cryptographic signature, used to sign ads. For instructions on generating this value, see Generating the signature to validate StoreKit-rendered ads.

## See Also

### Required keys

- [SKStoreProductParameterAdNetworkIdentifier](storekit/skstoreproductparameteradnetworkidentifier.md)
- [SKStoreProductParameterAdNetworkCampaignIdentifier](storekit/skstoreproductparameteradnetworkcampaignidentifier.md)
- [SKStoreProductParameterAdNetworkTimestamp](storekit/skstoreproductparameteradnetworktimestamp.md)
- [SKStoreProductParameterAdNetworkNonce](storekit/skstoreproductparameteradnetworknonce.md)