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A guide to Zero Trust for your mobile apps

Written by Alexander Tabalipa | May 27, 2025 1:00:42 PM

Over the past decade, organizations have redefined their security strategies around a single principle: never trust, always verify. The Zero Trust model has become the gold standard for securing users, networks, and systems, with a projected growth from $36.5 billion in 2024 to $78.7 billion by 2029.

But there's a critical blind spot:

Despite the rise of Zero Trust, most enterprises overlook one of today’s most exploited threat vectors: consumer-facing mobile applications.

Mobile apps are now central to business operations—powering transactions, customer interactions, and access to sensitive data. Yet, unlike traditional endpoints, they operate in uncontrolled, often untrusted environments. That makes them prime targets for sophisticated attacks.

 

In 2024 alone, over 33 million mobile cyberattacks were recorded globally, highlighting the scale and urgency of the threat. And these aren’t just technical issues—they’re business risks that directly impact customer trust, compliance, and revenue.

This isn’t just a technical problem. It’s a business liability.

Mobile apps are directly tied to customer trust, regulatory compliance, and revenue performance. Without applying Zero Trust principles at the app layer—especially during runtime—organizations leave themselves exposed.

This white paper presents a strategic roadmap for closing the mobile security gap by extending Zero Trust into the app runtime layer. It covers:

  • Why mobile is the weakest link in today’s Zero Trust architecture
  • A boardroom-ready narrative to justify runtime protection investments
  • A strategic framework for extending Zero Trust to mobile apps
  • How organizations can extend Zero Trust into mobile apps using frameworks like NIST 800-207, OWASP MASVS, CISA Zero Trust Maturity Model and the MITRE ATT&CK Mobile Matrix
  • Actionable next steps to align mobile security with enterprise priorities

If mobile is where your customers are, it must also be where your Zero Trust strategy leads. The time to act is now—before your most critical channel becomes your weakest link.

"According to the State of Zero Trust Security Report 2023, 80% of organizations increased their Zero Trust budgets over the past year—despite ongoing economic pressures—highlighting the growing strategic importance of Zero Trust initiatives."

The boardroom view: Making the case for mobile

Today, mobile is not just a channel—it’s the business. Over 70% of digital interactions now occur via mobile applications, and they directly impact brand experience, customer trust, and revenue streams.

Yet, despite the strategic role mobile apps play, most enterprises still approach their security with outdated assumptions, focusing only on pre-deployment checks while leaving the runtime environment exposed.

The consequence? In 2023, Kaspersky recorded over 33.3 million cyberattacks targeting mobile devices, including sophisticated runtime manipulations and post-install threats. Apps that appear clean during app store reviews can evolve into malicious tools via silent updates, leveraging dynamic code loading, privilege escalation, and reverse engineering techniques that evade static defenses.

For the board, this isn’t a theoretical issue—it’s a material risk. According to Experian’s 2024 Global Identity and Fraud Report, fraud driven by advanced social engineering, AI misuse, and mobile compromise is rising globally, with direct impact on revenue, compliance posture, and customer loyalty.

When mobile becomes the entry point for fraud or data exfiltration, the brand—not just the breach—is under attack. One breach through a manipulated mobile session can result in:

  • Millions in fraud losses (IBM reports the average breach cost at $4.45M)
  • Damaged customer trust and retention
  • Regulatory penalties from GDPR, CCPA, and others

CISOs who frame mobile runtime protection as a strategic trust asset—not a compliance checkbox—are gaining faster executive alignment. 

In short: If your mobile apps are not protected at runtime, you’re not protecting your business. Embedding Zero Trust principles into the mobile runtime is becoming a strategic imperative.

Read more: Making the business case for mobile app security ROI: A guide for IT leaders

Translating Zero Trust to mobile apps

Zero Trust comes down to one core principle: never assume trust—always verify it. Yet in many organizations, mobile apps remain dangerously under-verified.

While networks and users are subject to rigorous authentication and monitoring, mobile applications often operate with implicit trust. Once installed, they’re assumed to behave as expected—despite being exposed to rooting, reverse engineering, malicious updates, and insecure API access.

This gap creates a major exposure point at the edge of digital engagement.

Why runtime is the new trust boundary

Traditional defenses focus on what an app looks like when it's downloaded. But today’s attackers play a longer game. They manipulate apps after installation, when it’s too late for static analysis to help.

Modern threats include:

  • Silent escalation: apps that pass initial review but evolve into malicious behavior through updates
  • Runtime tampering: real-time manipulation of app behavior to bypass security or steal data
  • Reverse engineering: repackaged apps with embedded malware that mimic legitimate experiences

Runtime manipulation and post-installation attacks are rising sharply, with a 50% increase in mobile Trojan detections and widespread use of dynamic code loading to bypass static defences.

Think of a mobile app like a secure airport terminal. Checking a passport at entry isn’t enough—you need ongoing surveillance, restricted access zones, and behavior monitoring to maintain security throughout the traveller’s journey.

A runtime-centric Zero Trust framework

To bring Zero Trust into the mobile app layer, organizations must implement controls that continuously:

  • Monitor: detect tampering, emulators, root/jailbreak status, and code manipulation.
  • Verify: ensure the app instance is legitimate and hasn’t been altered post-install.
  • Protect: safeguard API access, encrypt secrets in memory, and prevent data leakage—even on compromised devices.

"Without these controls, mobile apps become the weakest link—exposed to fraud, malware, and unauthorized data access."

By embedding Zero Trust at the mobile runtime level, organizations can close this critical blind spot—turning mobile apps from untrusted gateways into defensible, verifiable assets.

Rethinking Zero Trust frameworks for mobile

Enterprise leaders are increasingly turning to trusted cybersecurity frameworks to guide Zero Trust adoption. While these models are not mobile-specific, their principles are highly adaptable to mobile applications—especially at runtime, where real-world threats often surface. Aligning with these frameworks ensures consistency, regulatory compliance, and a strong security baseline.

NIST SP 800-207: Continuous Verification for Mobile

NIST’s Zero Trust Architecture publication provides foundational principles for access decisions based on real-time context. While not tailored to mobile, its architecture-agnostic model translates well to app environments:

  • Evaluate device trust and session context continuously
  • Make risk-informed decisions based on user behaviour and runtime signals
  • Enforce policy controls at the app layer, not just the network

CISA Zero Trust Maturity Model: Applying the pillars

While the Cybersecurity and Infrastructure Security Agency's (CISA) model doesn’t explicitly focus on mobile, its five pillars—Identity, Devices, Networks, Applications & Workloads, and Data—map logically to the mobile threat surface:

  • Devices: assess device posture (e.g., rooted, emulated) before allowing access
  • Applications & workloads: detect runtime tampering, enforce integrity, and ensure the app itself validates trust
  • Data: secure mobile-resident and in-transit data, and detect abnormal access patterns
  • Cross-cutting capabilities: integrate mobile runtime telemetry with centralized detection and response

OWASP MASVS: Development and runtime safeguards

OWASP’s Mobile App Security Verification Standard (MASVS) offers both design-time and runtime guidance. Alignment with MASVS means:

  • Building apps using secure-by-design principles
  • Embedding defenses against runtime threats such as repackaging, memory injection, and unauthorized debugging

Read more: What is the OWASP MASVS?

OWASP MASVS Zero Trust Overlay

To help security teams operationalize these concepts, MASVS categories can be mapped directly to Zero Trust functions:

  • V1: Architecture and threat modeling: defines trust zones.
  • V2: Data storage: minimizes and encrypts data.
  • V3: Cryptography: protects secrets.
  • V4: Authentication: aligns with session-based trust.
  • V5: Network: secures API traffic with TLS and pinning.
  • V6: Platform interaction: limits exposure.
  • V7: Code quality: reduces supply chain risk.
  • V8: Resilience: enables runtime protections.

These controls embed Zero Trust directly into the mobile runtime—where traditional perimeter defences fall short.

Organizations looking to implement threat-informed defence for mobile can also reference the MITRE ATT&CK Mobile Matrix, which documents real-world attack behaviours—complementing prescriptive frameworks like OWASP MASVS. The MITRE ATT&CK helps:

  • Shape runtime detection strategies based on real-world attacker behavior
  • Align app monitoring capabilities with specific adversarial tactics

Operationalizing the frameworks in mobile

The thread across these frameworks is clear: continuous evaluation, dynamic enforcement, and architectural resilience. Yet many mobile apps today remain static and blind to runtime threats.

To bring Zero Trust to mobile:

  • Treat the mobile runtime as a living attack surface
  • Make trust decisions inside the app, not just around it
  • Validate integrity and behaviour continuously
  • Feed app-level insights into enterprise SOC and response workflows

These frameworks aren’t just reference material. They provide the strategic scaffolding for protecting mobile apps that actively defend themselves—in line with Zero Trust principles that prioritize verification over assumption.

Example in action: Enabling Zero Trust in the mobile runtime

Several organizations in finance, healthcare, and digital services have adopted mobile runtime protection platforms to extend Zero Trust into their mobile applications.

Rather than rely solely on perimeter defences or pre-deployment scans, these leaders are shifting security decisions into the application layer.

By implementing runtime protection strategies, they:

  • Reduce breach risks by shrinking the mobile attack surface and detecting tampering in real time.
  • Streamline compliance with PSD2, GDPR, HIPAA, and other evolving regulations through stronger identity, access, and data protections.
  • Accelerate secure product delivery by integrating app-layer security early in development, reducing remediation cycles and release delays.
  • Build user trust and loyalty, especially in mobile-first markets, where secure app experiences directly influence retention and brand equity.

These organizations are moving from reactive security to proactive enforcement, aligning mobile risk mitigation with business goals like regulatory compliance, fraud reduction, and user experience continuity.

They’ve recognized that securing mobile runtime environments requires deep, specialized capabilities—beyond what traditional tools or internal teams alone can deliver. To do it effectively, they’ve engaged with partners who understand how to operationalize Zero Trust principles within the mobile app itself. As a result, they are not just adopting frameworks—they're operationalizing them at runtime, on the user’s device. These efforts are already paying dividends: leaders report stronger compliance readiness, and accelerated time-to-market for secure app releases—demonstrating measurable ROI from their Zero Trust investments in mobile apps.

"In 2024, the average cost of a data breach rose to $4.88M. Financial firms were especially impacted, averaging $5.90M per breach. With millions of mobile devices compromised annually and mobile apps now at the center of digital engagement, the ROI of proactive protection is no longer theoretical—it’s imperative."

Strategic next steps

Zero Trust can’t stop at the network. It must extend all the way to the mobile runtime—where users interact, data flows, and critical business value is created.

As mobile threats grow more advanced, and app experiences become the primary channel for customer and partner engagement, traditional assumptions about trust boundaries no longer apply. Treating mobile as a second-class citizen in your Zero Trust strategy leaves your most exposed surfaces—apps running in untrusted environments—vulnerable to fraud, tampering, and compliance risk.