A CISA is evaluating the effectiveness of a new data loss prevention (DLP) solution. The DLP solution is configured to monitor outbound email and web traffic for sensitive data. During testing, the CISA observes that while the DLP successfully blocks emails containing credit card numbers, it fails to detect sensitive data being exfiltrated via encrypted chat applications or personal cloud storage services. What is the MOST critical recommendation the CISA should make?
- AIncrease the sensitivity of existing DLP rules for email and web traffic.
- BConduct more frequent training for employees on data handling policies.
- CImplement a policy to prohibit the use of unapproved chat and cloud services.
- DIntegrate the DLP solution with endpoint agents and network proxies.
Show answer & explanationAnswer & explanation
Correct answer: D. Integrate the DLP solution with endpoint agents and network proxies.
The current DLP only covers email and web. To detect data exfiltration via encrypted chat or personal cloud, the DLP needs broader visibility. Integrating endpoint DLP agents (to monitor local file access and application activity) and network proxies (to decrypt and inspect all network traffic, including encrypted channels) is essential to extend coverage.
Why the other options are wrong
- A. Increasing sensitivity for *existing* email/web rules won't help detect data exfiltration through *other* channels like encrypted chat.
- B. Training is a good practice, but it doesn't solve the technical detection gap in the DLP solution itself.
- C. Prohibiting services is a policy control; the question is about the *effectiveness of the DLP solution* in detecting exfiltration.
DLP Coverage Expansion
Extending data loss prevention capabilities beyond basic network traffic to include endpoints, cloud applications, and encrypted communication channels for comprehensive data protection.
- Endpoint DLP monitors data on devices.
- Network DLP monitors data in transit.
- Cloud DLP monitors data in cloud services.
Memory trick: DLP is only watching the front door and windows, but data is sneaking out the back and through the clouds.