Building the Identity Pillar of a Zero Trust Program

Zero Trust identity means no user or system is trusted automatically, inside or outside the network, and every access decision runs through identity controls. In my opinion, identity is the most important pillar of a Zero Trust program, and given how common attacks have become, I don’t think a strong Zero Trust strategy is optional anymore.

Saying nothing is trusted by default is the easy part. Putting it into practice takes a coordinated set of systems that give you real control over identity and access. Here are the four technology components I see at the core of a Zero Trust program:

• Privileged Access Management (PAM)
• Identity & Access Enforcement (IAE)
• Identity Governance & Administration (IGA)
• Identity Threat Detection & Response (ITDR)

Why Zero Trust identity comes first

Frameworks like NIST SP 800-207 and CISA’s Zero Trust Maturity Model describe several pillars: identity, devices, networks, applications and data. Identity sits underneath the rest. A device posture check, a microsegmented network or a data access policy all eventually ask the same question: who (or what) is making this request, and should they be allowed? If you can’t answer that reliably, the other pillars are making decisions on bad information.

It’s also where attackers spend their time. Stolen credentials, session hijacking, MFA fatigue and abuse of over-privileged accounts show up in incident after incident. Attackers log in far more often than they break in.

Privileged Access Management (PAM)

Attackers go after privileged accounts because they offer the most access to your network. A properly deployed PAM system, such as BeyondTrust, CyberArk, or Delinea, makes sure privileged credentials are managed, monitored, and recorded.

PAM lets administrators enforce policies like just-in-time (JIT) access, which activates privileged accounts only for designated tasks, and require multi-factor authentication (MFA). Locking down privileged accounts shrinks the attack surface and, most importantly, prevents lateral movement if a breach does happen.

The long-term goal is zero standing privileges: nobody holds admin rights by default, and elevated access is granted for a task and removed when it’s done. That’s about as literal an expression of Zero Trust as you’ll find.

Identity & Access Enforcement (IAE)

IAE platforms like Okta and Ping Identity guard the front door, letting only authenticated and authorized users reach network resources. They centralize identity management and provide single sign-on (SSO), MFA, and adaptive access policies that adjust to real-time risk signals like unusual login locations or device types.

The goal is reliable access to the resources people need, with less room for anyone to get in who shouldn’t. Done well, you get better efficiency and better security at the same time.

This is also where phishing-resistant MFA belongs. Passkeys and FIDO2 security keys close off the push-bombing and adversary-in-the-middle attacks that defeat SMS codes and simple push approvals.

Identity Governance & Administration (IGA)

A Zero Trust program isn’t sustainable unless identity governance is automated and can scale. Tools like Saviynt and SailPoint let you define and enforce access policies, streamline provisioning and deprovisioning, and review access rights on a regular basis.

They also help you meet regulatory requirements and cut the risk from excessive or outdated permissions, which attackers can exploit or, worse, which can lead to insider threats.

IGA is what keeps least privilege from decaying. Without it, people change roles, collect access along the way and keep all of it. Every enforcement decision downstream is only as good as the entitlements IGA says someone should have.

Identity Threat Detection & Response (ITDR)

Even the best prevention won’t stop everything. ITDR systems such as CrowdStrike and Microsoft ITDR monitor user behavior and access patterns to spot anomalies that might point to a compromised account or an insider threat.

They use machine learning and behavioral analytics to catch suspicious activity, like unusual login times or access attempts from unknown devices. The point is to surface something actionable early enough to deal with it before it becomes a real problem on your network.

ITDR also watches the identity infrastructure itself: Active Directory, Entra ID and your identity provider. Misconfigurations and attacks against those systems undermine every other control, so they deserve their own monitoring.

How the Zero Trust identity pillar fits together

Each of these systems helps on its own. Zero Trust really pays off when they work together. Aligning PAM, IAE, IGA, and ITDR gives you visibility and control across every part of identity and access.

A simple example: if it’s planned and configured properly, an IGA system can feed real-time data to your IAE tools so they can enforce dynamic access policies. Meanwhile, what ITDR sees can shape your PAM strategy so you get ahead of risk instead of reacting to it.

The connections worth building first:

• IGA to IAE: joiner, mover and leaver events drive account creation and, more importantly, fast removal in the identity provider and connected apps.
• IGA to PAM: who is entitled to request privileged access is a governed decision, reviewed like any other entitlement.
• IAE to PAM: privileged sessions start with the same strong, phishing-resistant authentication as everything else.
• ITDR to IAE and PAM: a high-risk signal can force step-up authentication, revoke sessions, or rotate a privileged credential automatically.
• Everything to the SIEM: one place to correlate identity events with endpoint and network activity.

Where to start: a maturity sequence

Nobody builds all four components at once, and trying usually means none of them get finished. A sequence I find works for most organizations:

1. Get the identity foundation in order. One authoritative source for who works here, a consolidated identity provider, and MFA everywhere it can reasonably go.
2. Lock down privileged access. Vault and rotate the most powerful accounts, record admin sessions and start moving toward JIT. This is often the best first major investment, because privileged accounts are where a breach turns into a disaster.
3. Automate lifecycle and reviews. Connect HR to IGA, automate provisioning and deprovisioning for the main systems, and run access reviews that people actually read.
4. Add detection and response. Deploy ITDR once you have enough control to act on what it finds.
5. Move to adaptive, continuous decisions. Risk-based policies, short-lived access and automated responses tying the pieces together.

My advice: If you’re unsure where to start, start with privileged access. It’s the smallest population of accounts with the largest blast radius, and progress there shows up quickly in both risk reduction and audit results.

Common mistakes

• Treating Zero Trust as a product. No single vendor sells you Zero Trust. They sell components of it.
• Forgetting non-human identities. Service accounts, API keys and workloads often outnumber people and frequently hold more privilege.
• MFA with gaps. MFA on the VPN but not on admin consoles, or exceptions for executives, leaves the door open where it matters most.
• Buying ahead of process. An IGA tool can’t automate a joiner-mover-leaver process nobody has defined.
• Detection without response. ITDR alerts that nobody owns are just expensive logs.

Where it tends to go wrong: A program buys all four categories in the same budget cycle, deploys each to a pilot group, and two years later has four partially integrated tools and the same standing admin accounts it started with. Finishing one component properly beats starting four.

How to measure progress

Pick a handful of metrics that reflect actual risk, track them every quarter and report them in plain language:

• Percentage of privileged accounts vaulted and rotated.
• Number of accounts with standing admin rights, trending down.
• Percentage of users and admins on phishing-resistant MFA.
• Time to remove access after someone leaves.
• Percentage of applications connected to SSO and to IGA.
• Access review completion rate, and how much access is actually revoked as a result.
• Mean time to detect and contain identity-based incidents.

The last two are the honest ones. A review where nothing ever gets revoked is a rubber stamp, and a detection tool you’ve never tested hasn’t been proven.

Making it a program

None of this works on technology alone. It takes ongoing improvement and real teamwork across groups. That’s why identity has to be run as a program, an interconnected set of projects driving toward a strategic goal, and not as a single project with a start and an end date. Whether you’re protecting sensitive customer data or critical infrastructure, a well-designed identity strategy is your first line of defense.