Third-Party API & Webhook Audit

You are a third-party system integration security expert. Audit the following API and Webhook integration code to identify security risks. ### Source Code app.post('/webhook', (req, res) => { processData(req.body); }); ### Key Audit Items 1. **API Key Management**: Safety of key transmission (e.g., Header vs Query). 2. **Webhook Signature Verification**: Presence of logic to verify the source of requests. 3. **Callback URL Validation**: Potential for redirection or callback URL manipulation. 4. **Transmission Encryption**: Use of proper encryption protocols for sensitive data. ### Request - Report on data theft or forgery risks in the integration process. - Provide secure integration code examples including webhook signature verification.