Ad Platform Security: 5 Steps to EAS Compliance in 2026

When you’re dealing with EAS compliance and data protection rules, strong ad platform security is non-negotiable. Your ad platforms are swimming in sensitive user data, campaign financials, and your company’s proprietary strategies, making them a huge target for cyberattacks. If you ignore the vulnerabilities, you’re asking for a massive data breach, huge regulatory fines, and the kind of brand damage you can’t just fix with a PR campaign. You have to assume an incident is coming, so the only real question is whether your defenses are built to handle the hit and get you back online fast.

1. Implement Strong Multi-Factor Authentication (MFA) Across All User Accounts

Your first line of defense is always access control. Multi-Factor Authentication (MFA) is the foundation of that defense, adding a security layer that a simple password can’t match. Google Ads, for example, pushes MFA hard for all accounts, especially any with admin rights. With MFA enabled, even an attacker with a stolen password can’t get in because they’re stopped by the second verification step, which usually requires a code from a mobile app or a physical hardware key.

You can set this up by going to the security settings in each platform. In Microsoft Advertising, it’s under “Profile & Preferences” and then “Security Settings.” For Meta Business Suite, you’ll find it in “Business Settings” and then “Security Center,” which lets you force two-factor authentication on every single user in the business account. Make it a mandatory policy for everyone. No exceptions. From the intern running a small campaign to the CFO checking the budget, everyone gets MFA. There’s a reason for this: a 2023 Statista report showed that MFA blocks over 90% of automated account takeover attacks.

Pro Tip: Don’t just use SMS for MFA. It’s better than nothing, but SIM-swapping is a real and growing threat. You should push for authenticator apps like Google Authenticator or (even better) physical security keys like a YubiKey to get the best protection. Make sure every new hire sets up their MFA during their initial onboarding before they get any access.

Common Mistake: The biggest mistake I see is only turning on MFA for admins. Any user is a potential entry point, and even a low-level account getting compromised can lead to data theft or serious ad fraud.

2. Regularly Audit and Restrict User Permissions Based on the Principle of Least Privilege

With MFA locked in, your next job is figuring out who has access to what inside your ad platforms. You need to live by the principle of least privilege, which just means people should only have the bare minimum permissions to do their jobs, dramatically shrinking your attack surface. Any EAS compliance framework will flag excessive permissions as a huge vulnerability.

You need to run a full audit of all user roles and permissions across Google Ads, Meta Business Suite, LinkedIn Campaign Manager, etc., at least once a quarter. In LinkedIn Campaign Manager, for instance, a media buyer likely only needs “Campaign Manager” permissions, not “Account Admin.” A reporting analyst probably just needs “Viewer” access. When someone changes roles or leaves, their access should be reviewed and adjusted immediately, not at the end of the month.

I’ve personally seen a situation where a former employee’s access wasn’t pulled fast enough. They logged back in and started wrecking campaigns and stealing targeting data. This is a very real risk that has nothing to do with trust and everything to do with having a tight, repeatable offboarding process.

Pro Tip: Build out some standardized role-based access control (RBAC) templates for your common job functions (media buyer, analyst, finance, etc.). It makes provisioning new users much faster, ensures consistency, and forces you to document exactly what permissions each role actually requires.

Common Mistake: Stop giving everyone “admin” access just because it’s easy. It’s a total security nightmare that blows the principle of least privilege out of the water and creates countless ways for things to go wrong, whether from a malicious outsider or an internal mistake.

3. Encrypt All Sensitive Data, Both In Transit and At Rest

Data protection is the whole point of EAS compliance, and that means you have to encrypt sensitive information from beginning to end. Whether data is moving between your computer and an ad platform (in transit) or just sitting on a server (at rest), it has to be locked down. The big ad platforms all use HTTPS/TLS 1.2 or better for data in transit, which is good, but you still need to verify it and make sure your own systems are doing the same when you’re pushing data around.

For data at rest, think about any PII (Personally Identifiable Information) or campaign data you’re storing on your own servers or in the cloud. That data needs to be encrypted with something strong like AES-256. If you’re using a Customer Data Platform (CDP) to process first-party data before sending it to an ad platform, you need to check that your CDP provider has strong encryption. Segment, for instance, details its data security practices and its focus on encryption at rest and in transit.

Pro Tip: If you’re plugging third-party tools or APIs into your ad platforms, you have to dig into their data encryption policies. Ask for their SOC 2 Type II reports to see if they’re actually following industry standards, because one weak vendor can bring your whole security setup down.

Common Mistake: The mistake is assuming everything is automatically encrypted properly. The major platforms have good defaults, but you are in the end responsible for the end-to-end encryption, especially if you have custom integrations or are storing data locally.

4. Establish a Complete Incident Response Plan for Security Breaches

Things go wrong. Even with great defenses, breaches happen. A resilient company isn’t one that never has an incident. It’s one that can respond quickly and effectively when one happens. An incident response plan is your playbook for identifying, containing, and recovering from a security problem. For any serious security strategy, especially under EAS compliance, having one is non-negotiable.

The plan must be specific: who gets called, how do you shut down the affected systems (like pausing a rogue ad campaign or yanking API tokens), how do you figure out what happened, and what’s the process for getting back to normal? You have to test it, too. Run a fire drill at least once a year. What’s the plan if an unauthorized ad campaign starts draining your budget? Who does what?

NIST Special Publication 800-61 Revision 2 is an excellent, if dense, guide for computer security incident handling that you can adapt for your ad platform security needs. It gives you a solid framework for preparation, detection, containment, and post-incident review.

Pro Tip: Make sure your response plan includes a communications strategy. Figuring out who says what to whom (and when) is just as important as the technical fix, especially if you have to talk to regulators or customers about what happened.

Common Mistake: The classic mistake is having a plan that just collects dust. An untested plan is a useless plan. You have to run drills to make sure people can actually execute it under pressure.

5. Conduct Regular Security Audits and Penetration Testing

To find new vulnerabilities and make sure you’re actually following security standards, you need to be doing regular security audits and penetration tests. An audit checks your policies and logs against the rules, like those for EAS compliance. A pen test is more aggressive, where you hire someone to act like a real attacker and find holes in your setup before the bad guys do.

You should hire a reputable third-party firm to do this annually, or more often if you’re making big changes to your tech stack. They’ll have an objective view and will find the blind spots your internal team is guaranteed to miss, like an old API key for a tool you stopped using years ago that still has admin access. A recent IAB report confirms that ad tech security is getting more complex which is why you need that external validation. This is about proactive risk management in a field where the threats change every day.

Pro Tip: Don’t just focus on the tech. Your people are a huge part of your security. Regular security awareness training on phishing, social engineering, and password hygiene is a massive complement to any technical fix.

Common Mistake: Don’t treat security audits like a box-ticking exercise you do once a year for compliance. Security requires constant effort and attention. Regular assessments are how you maintain a real defense.

Securing your ad platforms isn’t a one-and-done project. It’s a constant, proactive effort. If you systematically put in strong MFA, audit permissions, encrypt your data, plan for incidents, and run regular security checks, you’ll build a real defense against cyberattacks. This kind of commitment protects your data and money, and it’s how you build real trust with your clients and the regulators watching over your shoulder.