A device may receive a network address and a signature. The network address may be associated with a sponsored data campaign, and the signature may be generated based on a security key and based on the network address. The device may perform a validation operation on the signature to validate that the network address is associated with the sponsored data campaign. The validation operation may be performed based on the security key. The security key may be obtained based on a key identifier. The device may selectively permit or deny access to content associated with the network address based on a result of the validation operation.