Identity and Access Management (IAM) Security Guide
Zero Trust Identity Model: Never Trust, Always Verify
The zero trust identity model eliminates implicit trust — every access request is verified regardless of network location, device, or previous authentication. Core principles: verify explicitly (authenticate and authorize every request), use least-privilege access (minimal permissions, just-in-time elevation), assume breach (monitor continuously, limit blast radius). Implementation: strong MFA everywhere, device health verification, continuous session evaluation, micro-segmentation, and real-time risk assessment for every access decision.
Andreas Johansson · Chief Executive Officer
Senior IT management leader with 25 years of experience in Cloud, Security, and Datacenter infrastructure.
Beyond the Perimeter
Traditional security operates on a simple model: outside the network is untrusted, inside is trusted. Authenticate at the perimeter (VPN, firewall), and you're trusted for the duration of your session.
This model fails in modern environments:
- Cloud resources aren't inside the network perimeter
- Remote workers access resources from home networks, coffee shops, and airports
- SaaS applications are accessed directly from the internet
- Attackers who breach the perimeter move laterally with impunity because internal traffic is trusted
Zero trust replaces this model with a fundamental principle: never trust, always verify. Every access request — from any user, any device, any location, to any resource — is evaluated independently based on identity, context, and risk.
Core Principles
Verify Explicitly
Every access request must be authenticated and authorized based on all available data:
- Identity verification. Who is requesting access? Is their identity verified with strong authentication?
- Device verification. Is the device known, managed, and healthy? Is it patched, encrypted, and running endpoint protection?
- Location context. Is the request coming from an expected location? Does it represent impossible travel?
- Behavioral context. Is this request consistent with the user's normal patterns?
- Resource sensitivity. How sensitive is the requested resource? Does the risk justify the access?
Least-Privilege Access
Grant minimum necessary access, for the minimum necessary duration:
- Just-in-time (JIT) access. Privileges are granted when needed and automatically revoked after use
- Just-enough access (JEA). Permissions are scoped to the specific task, not broad administrative access
- Time-limited sessions. Access expires and must be re-authenticated
- Continuous evaluation. Access can be revoked mid-session if risk signals change
Assume Breach
Design as if attackers are already inside:
- Micro-segmentation. Even after authentication, users can only access the specific resources they're authorized for — not the entire network
- Continuous monitoring. Every access is logged and analyzed for anomalous patterns
- Blast radius limitation. If one identity is compromised, the damage is contained to that identity's limited permissions
- Encryption everywhere. Data is encrypted in transit and at rest, even within internal networks
Identity as the Control Plane
In zero trust, identity is the central control for all access decisions. The identity layer must:
- Provide strong authentication. Phishing-resistant MFA is required — not optional. FIDO2 hardware keys or passkeys ensure that compromised passwords don't grant access.
- Enable contextual authorization. Access decisions consider not just who the user is, but what device they're using, where they are, what they're accessing, and whether the request matches their normal behavior.
- Support continuous evaluation. Authentication isn't a one-time gate at session start. The identity system continuously evaluates risk throughout the session and can step up authentication requirements or terminate sessions based on changing risk signals.
- Integrate with all resources. Identity must be the access control for cloud infrastructure, SaaS applications, on-premises systems, APIs, and data — not just a subset.
Implementation Strategy
Phase 1: Foundation
- Deploy strong MFA on all user accounts (phishing-resistant for admins)
- Implement SSO to centralize authentication
- Establish device management and health assessment
- Create comprehensive identity inventory
Phase 2: Visibility
- Implement comprehensive logging of all authentication and authorization events
- Deploy identity threat detection (impossible travel, anomalous access, credential attacks)
- Map all access patterns to understand normal behavior
- Identify excessive permissions and standing privileges
Phase 3: Access Controls
- Implement least-privilege access across applications and infrastructure
- Deploy just-in-time access for privileged operations
- Implement conditional access policies (location, device, risk-based)
- Micro-segment access to sensitive resources
Phase 4: Continuous Verification
- Implement continuous session evaluation
- Deploy adaptive authentication that responds to real-time risk
- Automate access revocation based on risk signals
- Implement data-level access controls
Challenges
- Legacy systems. Older applications may not support modern authentication protocols. Plan for proxy-based or gateway-based integration.
- User experience. More verification can mean more friction. Adaptive authentication minimizes friction for low-risk access while enforcing strict verification for high-risk access.
- Complexity. Zero trust is a transformation, not a product purchase. It requires changes to architecture, processes, and culture.
- Completeness. Zero trust is only effective when applied comprehensively. A zero-trust cloud environment connected to a trusted-perimeter on-premises network still has trust boundaries that attackers can exploit.
How SeqOps fits
SeqOps connects read-only to your AWS, Azure and Google Cloud accounts and reports access risks alongside vulnerabilities and misconfigurations, each ranked from Critical to Informational. Your identity resources are part of its cloud inventory. It doesn't manage identities or monitor sign-ins.