import json

class ExternalInterface:
    def fetch_data(self, endpoint):
        """Simulates a secure, proxied API fetch."""
        # In a live environment, this would call requests.get(endpoint)
        # Here, we validate the request structure before 'fetching'
        if not endpoint.startswith("https://"):
            return {"error": "Invalid/Insecure Protocol"}
        
        # Mocking external data
        return {"status": "success", "data": "External Knowledge Ingested"}