EASM vs CAASM vs DRPS: the guide to stop confusing attack surface management acronyms
Only 17% of organizations identify more than 95% of their assets. This figure, from a 2024 Gartner study, highlights an alarming reality. The visibility of your attack surface remains a major challenge. Yet, your company’s security directly depends on it. You must understand the tools at your disposal to master this complexity.
EASM: the attacker’s view
External Attack Surface Management (EASM) puts you in the attacker’s shoes. It continuously scans your external perimeter. It detects digital assets exposed on the Internet. This includes your domains, IP addresses, SSL certificates, and even forgotten shadow IT. An unpatched pre-production server, accessible from the web, is an easy target. EASM reveals it before a cybercriminal exploits it. It is a proactive approach, essential for prevention.
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CAASM: the unified inventory
Cyber Asset Attack Surface Management (CAASM) focuses on your internal inventory. It aggregates data from your existing security tools. EDR, cloud solutions, Active Directory, CMDB: all these sources are consolidated. CAASM identifies, for example, 200 machines without an active EDR agent. These machines are nonetheless present in your Active Directory. It solves the problem of internal blind spots. You get a complete view of your assets, their configuration, and their security posture. It is the foundation of good cyber hygiene.
DRPS: beyond the infrastructure
Digital Risk Protection Services (DRPS) go beyond your infrastructure. They monitor the web, including the dark web. Their goal is to protect your brand, reputation, and sensitive data. A concrete example: the sale of customer databases on a specialized forum. Or the detection of identity theft of your CEO on social networks. DRPS alert you to these external threats. They allow you to act before a major impact. Gartner predicts that DRPS adoption will grow from 1% to 10% of companies by 2025.
Comparing the approaches
| Characteristic | EASM | CAASM | DRPS |
|---|---|---|---|
| Perimeter | External assets, Internet | Internal, hybrid assets | Brand, data, reputation |
| Objective | Discovery, vulnerabilities | Visibility, hygiene | Leaks, impersonations, threats |
| Method | External scans, OSINT | API aggregation, correlation | Web monitoring, dark web |
| Example | Forgotten web server | Machine without EDR | Customer data on the dark web |
| Nature | Proactive, technical | Proactive, inventory | Reactive, intelligence |
Prioritize your projects
You must choose the right approach according to your maturity. Start with EASM. Master your external attack surface. It is often the entry point for attackers. Acquiring companies frequently discover critical flaws in a target’s external perimeter only after the deal closes. This highlights the importance of this first step. Next, consolidate your inventory with CAASM. Finally, protect your image with DRPS. The Autodit.io platform can help you orchestrate these different layers of protection. Investments in proactive security will grow twice as fast as reactive security by 2028 (Gartner, 2024).
FAQ
What is shadow IT?
Shadow IT refers to systems, software, or services used without IT department approval. It evades control, creating security risks. EASM helps detect it.
Does CAASM replace my CMDB?
No, CAASM complements your CMDB. It enriches inventory data with security information. It offers a dynamic view of your assets’ posture.
Do DRPS protect against all data leaks?
DRPS detect data leaks that are made public. They do not directly protect against internal exfiltration. They alert you to the confirmed compromise of your information.