OWASP Mobile Top 10 (2026 Edition)
The OWASP Mobile Top 10 is the industry-standard catalog of the most impactful mobile application security risks. Every production app — from a local Los Angeles restaurant ordering platform to a multinational fintech — should be assessed against it. The 2026 edition reorders priorities based on real-world breach data, with credential mishandling and supply chain attacks climbing the list.
At Frenchy Digital, every mobile app we ship — iOS, Android, React Native, or Flutter — is tested against the current OWASP Mobile Top 10 before App Store or Play Store submission. The table below summarizes each risk with a real-world example and the mitigation we apply in our engineering playbook.
| # | Risk | Example | Mitigation |
|---|---|---|---|
| M1 | Insecure Credential Storage | OAuth refresh tokens stored in UserDefaults / SharedPreferences in plaintext | Use iOS Keychain (kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly) and Android EncryptedSharedPreferences / Keystore |
| M2 | Inadequate Supply Chain Security | Compromised third-party analytics SDK exfiltrates device data | Pin SDK versions, audit transitive deps (npm audit, gradle dependencyCheck), use SBOM, review SDK code |
| M3 | Insecure Authentication/Authorization | API accepts stale JWT, no token rotation, missing MFA on admin actions | Short-lived access tokens (15 min), refresh rotation, OAuth 2.1/OIDC, MFA on sensitive flows |
| M4 | Insufficient Input/Output Validation | SQL injection via search field, XSS in WebView | Server-side validation, parameterized queries, CSP for WebViews, output encoding |
| M5 | Insecure Communication | Plain HTTP endpoint, TLS 1.0 fallback, accepts invalid certs | Enforce TLS 1.3, NSAppTransportSecurity strict, reject invalid certs, certificate pinning |
| M6 | Inadequate Privacy Controls | App collects IDFA without ATT prompt, shares PII with ad networks | App Tracking Transparency, Android privacy dashboard, data minimization, DPIA documented |
| M7 | Insufficient Binary Protections | Release APK ships with debug symbols, no obfuscation, easy to reverse engineer | R8/ProGuard, Swift symbol stripping, RASP, integrity checks, jailbreak/root detection |
| M8 | Security Misconfiguration | Debug logs enabled in production, allowBackup=true, exported activities | Separate release build flavors, disable logs, android:allowBackup=false, review manifests |
| M9 | Insecure Data Storage | PHI cached in SQLite without encryption, sensitive data in screenshots | SQLCipher/Realm encryption, FLAG_SECURE on sensitive screens, clear caches on logout |
| M10 | Insufficient Cryptography | ECB mode AES, hardcoded key in binary, custom cipher | AES-GCM with hardware-backed keys, never hardcode keys, no custom crypto — use platform APIs |
- 60% of mobile apps leak sensitive data through one or more Top 10 categories (Verizon MSI 2026)
- M1 (Credential Storage) and M3 (Authentication) account for ~55% of mobile-related breaches
- M2 (Supply Chain) is the fastest-growing risk — every added SDK is a potential backdoor
- M7 (Binary Protections) is often skipped for MVPs but becomes critical post-revenue
- M8 (Misconfiguration) is the cheapest class of bug to fix and the most often overlooked
The Mobile Top 10 is not a checklist you complete once — it is a continuous reference you revisit every release, every SDK upgrade, every feature that touches user data.
— OWASP Mobile Application Security Project, 2026
Authentication & Biometrics
Authentication is the single most attacked surface of any mobile application — 82% of breaches involve credential compromise according to the 2026 Verizon DBIR. Modern mobile authentication must balance strong cryptographic proof of identity with the usability expectations users have after a decade of Face ID and Touch ID.
Password-Based Authentication (Still the Default)
Passwords are not dead, but they must be paired with modern protocol design. Enforce minimum 12-character passwords with no arbitrary composition rules (per NIST SP 800-63B), block breached passwords using the HaveIBeenPwned k-anonymity API, use Argon2id or bcrypt (cost ≥ 12) server-side, and always require TLS 1.3 for transmission. Rate-limit login attempts and implement progressive delays to defeat credential stuffing.
Multi-Factor Authentication (MFA)
MFA should be mandatory for any account handling payments, PHI, or admin actions. Prefer TOTP (RFC 6238) over SMS — SMS is vulnerable to SIM-swap attacks. For the highest assurance, support FIDO2/WebAuthn with platform authenticators (Passkeys). Passkeys are now supported natively on iOS 17+ and Android 14+ and should be the default for new apps built in 2026.
Biometric Authentication (Face ID, Touch ID, BiometricPrompt)
Biometrics are a usability layer, not an identity factor on their own. The correct pattern: on first login with password/MFA, generate a per-device asymmetric key pair in the Secure Enclave (iOS) or StrongBox/Keystore (Android), send the public key to the server, and gate access to the private key behind a biometric prompt. Subsequent logins sign a server-issued challenge with the biometric-protected key — the server authenticates the device cryptographically, not by trusting the biometric result.
Session & Token Management
Use short-lived access tokens (15-minute JWTs) and longer-lived refresh tokens (7-30 days) with rotation on every use. Store refresh tokens in the Keychain/Keystore — never in UserDefaults, SharedPreferences, AsyncStorage (React Native), or SQLite without encryption. Invalidate sessions server-side on logout, password change, and suspicious activity. For high-risk apps, bind tokens to the device using DPoP (RFC 9449) or mTLS so stolen tokens are useless on other devices.
| Authentication Method | Security Level | UX Friction | Best For |
|---|---|---|---|
| Password only | Low | High | Legacy, low-risk internal tools |
| Password + SMS OTP | Medium | Medium | Not recommended — SIM swap risk |
| Password + TOTP | High | Medium | Financial, healthcare, enterprise |
| Password + Biometric unlock | High | Low | Consumer apps with sensitive data |
| Passkeys (FIDO2/WebAuthn) | Very High | Very Low | New apps — phishing resistant |
| mTLS / DPoP + Biometric | Maximum | Low | Banking, trading, PHI platforms |
For regulated industries, pair biometric unlock with step-up authentication on sensitive actions — for example, a telehealth app can unlock with Face ID but require a fresh password or TOTP before prescribing controlled substances. This matches the intent of HIPAA's "reasonable and appropriate safeguards" clause and NIST SP 800-63B AAL-2/AAL-3 guidance.
Data Encryption: In Transit and At Rest
Encryption is a commodity in 2026 — there is no excuse for plaintext data. The engineering challenge is choosing the right primitives, managing keys correctly, and avoiding the landmines of custom cryptography. The rule every engineer at Frenchy Digital follows: never roll your own crypto, always use platform APIs, and store keys in hardware-backed enclaves.
- Data in transit: TLS 1.3 with AEAD cipher suites (AES-GCM, ChaCha20-Poly1305)
- Data at rest: AES-256-GCM, keys in iOS Keychain or Android Keystore
- Passwords (server-side): Argon2id with 64MB memory, 3 iterations, or bcrypt cost ≥ 12
- Asymmetric: RSA-3072 minimum or ECDSA/ECDH with P-256 / P-384 curves
- Hashing: SHA-256 or SHA-3 — never MD5 or SHA-1 for new work
- Key exchange: ECDHE for forward secrecy, never static DH
Encryption in Transit (TLS 1.3)
All network traffic must use TLS 1.3 as a hard floor. On iOS, enforce this through NSAppTransportSecurity with NSExceptionMinimumTLSVersion set to TLSv1.3 and no arbitrary exception domains. On Android, use the network security config (network_security_config.xml) to block cleartext traffic (cleartextTrafficPermitted=false) and limit trust to system CAs. TLS 1.3 mandates AEAD cipher suites and forward secrecy, eliminating entire classes of attacks (BEAST, CRIME, POODLE, Lucky 13).
Encryption at Rest (AES-256)
Use AES-256-GCM for any sensitive data persisted on device — authentication tokens, PII, PHI, payment info, business secrets. On iOS, CryptoKit's AES.GCM.SealedBox is the idiomatic API; on Android, use javax.crypto.Cipher with AES/GCM/NoPadding and a randomly generated 12-byte IV per encryption. Never reuse IVs with the same key — GCM catastrophically fails under nonce reuse. For databases, use SQLCipher or Realm's built-in encryption, both AES-256 with HMAC integrity.
| Use Case | Algorithm | Key Size | Mode / Parameters | Where Keys Live |
|---|---|---|---|---|
| TLS in transit | AES-GCM / ChaCha20-Poly1305 | 256-bit | TLS 1.3 AEAD, ECDHE key exchange | Session — ephemeral |
| Data at rest (files, cache) | AES | 256-bit | GCM with random 96-bit IV | Keychain / Keystore (hardware-backed) |
| Database (SQLite/Realm) | AES (SQLCipher) | 256-bit | CBC + HMAC-SHA256 or GCM | Derived from user-entered key via PBKDF2-SHA512 (256K iterations) |
| Passwords (server-side) | Argon2id | n/a | 64MB memory, 3 iterations, 4 parallelism | Salt stored with hash in DB |
| Asymmetric signing | ECDSA | P-256 / P-384 | SHA-256/384 | Secure Enclave / StrongBox |
| Asymmetric encryption | RSA-OAEP or ECIES | RSA-3072 / P-256 | SHA-256 | Keychain / Keystore |
| Deprecated — do NOT use | MD5, SHA-1, DES, 3DES, RC4, TLS < 1.2, AES-ECB | — | — | — |
Key Management (The Hard Part)
Encryption is only as strong as your key management. Never hardcode keys in source code or plist/resources — attackers extract them trivially with strings or class-dump. Generate keys on first launch, store them in the iOS Keychain with kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly or the Android Keystore with setUserAuthenticationRequired(true). For server-managed keys, use AWS KMS, Google Cloud KMS, or Azure Key Vault with envelope encryption — never ship the master key to the device.
The weakest link in any cryptographic system is almost never the algorithm — it is how keys are generated, stored, rotated, and destroyed. Design for key management first; pick algorithms second.
— NIST SP 800-175B — Guideline for Using Cryptographic Standards
Certificate Pinning
Certificate pinning — restricting trust to a specific server certificate or public key — defeats active man-in-the-middle attacks that plain HTTPS cannot. Attackers who install a rogue root CA on a device (via malware, corporate MDM, or a compromised public Wi-Fi) can silently intercept TLS traffic; certificate pinning breaks that attack by rejecting any certificate not matching the pinned fingerprint.
Pinning is strongly recommended for banking, healthcare, fintech, and enterprise apps. For lower-risk consumer apps, the operational overhead may outweigh the benefit — the worst mobile security incident of 2024 was a major bank bricking their own app when their pinned certificate expired without a rotation plan.
- Pin the public key (SPKI), not the full certificate — survives leaf cert rotation
- Always ship at least one backup pin for the next-generation certificate
- Set pins to expire in-app before the server certificate expires (safety margin)
- Implement a remote kill-switch to disable pinning if something goes wrong
- Log pin failures to backend telemetry — never crash the app on failure alone
- Rotate pins on a published schedule that matches your PKI rotation cadence
iOS Implementation
On iOS, implement certificate pinning via the URLSessionDelegate urlSession(_:didReceive:completionHandler:) method — compare the server's SPKI hash against your pinned hashes. Alternatively, use TrustKit, which handles report-only mode, backup pins, and expiration for you. Never disable App Transport Security globally to make pinning work.
Android Implementation
On Android 7.0+, use the declarative network_security_config.xml with <pin-set> — no code required. For more control, use OkHttp's CertificatePinner with a rotation window or the HttpsURLConnection with a custom X509TrustManager. Always include an expiration date in the pin set so an emergency unpinning is possible without a forced app update.
React Native / Flutter Implementation
For React Native, use react-native-ssl-pinning or platform-native modules — JavaScript-only libraries cannot pin reliably. For Flutter, use the http package with a custom SecurityContext, or rely on the dio_certificate_pinning plugin. In both cases, ensure iOS and Android get platform-native enforcement; bridge-level pinning is bypassable.
Certificate pinning is the only mobile security control with a non-trivial chance of bricking your app in production. Treat pin rotation as a first-class release-engineering concern — not an afterthought.
— Frenchy Digital Mobile Security Playbook
Code Obfuscation & Anti-Tamper Controls
Binary protections — code obfuscation, runtime application self-protection (RASP), jailbreak/root detection, anti-debugging — raise the cost of reverse engineering and runtime tampering. They do not make an app unbreakable; they slow sophisticated attackers and eliminate the long tail of opportunistic ones. For high-value apps (payments, DRM, competitive IP, anti-cheat), they are table stakes.
| Control | What It Does | When to Use | Tools |
|---|---|---|---|
| Symbol stripping | Removes method/class names from binary | Every release build | Xcode Build Settings (iOS), R8 (Android) |
| Code obfuscation | Renames identifiers, inserts dead code, flattens control flow | Every release build | R8/ProGuard (Android), Obfuscator-LLVM (iOS) |
| String encryption | Encrypts hardcoded strings (API endpoints, keys) | High-value apps | Custom pre-build step, DexGuard (Android) |
| Jailbreak/root detection | Detects compromised devices, blocks or warns | Banking, healthcare, DRM | Stock checks + commercial RASP SDKs |
| Anti-debugging | Blocks gdb/lldb/frida attachment | Payment, auth-critical flows | ptrace checks, Frida detection libs |
| Integrity checking | Verifies binary hasn't been modified | Every release | iOS code signing + runtime hash check; Google Play Integrity API |
| RASP (commercial) | Full binary protection platform | Enterprise, financial apps | Guardsquare, Appdome, Promon Shield |
Android: R8 / ProGuard
Enable R8 (the modern replacement for ProGuard) on every release build via minifyEnabled true and shrinkResources true in build.gradle. R8 renames classes/methods to short identifiers, removes dead code, and shrinks resources. For high-value apps, upgrade to DexGuard, which adds string encryption, class encryption, and advanced RASP. Ship ProGuard rules that explicitly keep only what reflection requires — never use catch-all rules that defeat the point.
iOS: Symbol Stripping & Swift Obfuscation
Set Strip Debug Symbols During Copy to YES, Strip Linked Product to YES, and Deployment Postprocessing to YES in release builds. Swift has less idiomatic obfuscation tooling than Kotlin, but projects like SwiftShield rename non-public symbols. For serious protection, use iXGuard or Obfuscator-LLVM forks maintained for modern Xcode.
Jailbreak & Root Detection
Check for the presence of known jailbreak/root artifacts — /private/var/lib/apt, Cydia URL schemes, su binaries, root-only paths — but expect bypass tools (like Frida, Liberty Lite, Magisk Hide) to defeat naive checks. Layer multiple detection vectors, verify results server-side (Play Integrity API on Android, DeviceCheck or App Attest on iOS), and choose your response carefully: blocking jailbroken users reduces attack surface but also support costs.
- Obfuscation buys time — not security. Use it to slow attackers, not as your only defense.
- Never rely on client-side jailbreak detection alone. Validate device integrity server-side.
- All critical authorization decisions must happen server-side. If the app is compromised, the server still enforces policy.
- Commercial RASP platforms (Guardsquare, Appdome) pay off for payment/DRM/banking apps; for most apps, R8 + good architecture is enough.
- Release builds must differ from debug builds — no logs, no test endpoints, no dev menus, no <code>debuggable=true</code>.
API Security: The Real Attack Surface
The mobile app binary is rarely the target — the backend API is. An attacker with any copy of the app can enumerate every endpoint, extract tokens, and hit the API directly with tools like Burp Suite, mitmproxy, or Postman. Everything important must be enforced server-side. This is why our engineering playbook at Frenchy Digital treats API security as inseparable from app security, and why we wrote a dedicated guide on API development best practices for 2026.
Authentication & Authorization at the API Layer
Use OAuth 2.1 + OIDC with short-lived JWT access tokens (15 minutes) and refresh token rotation. Validate every request: verify signature, check expiration, validate audience (aud) and issuer (iss), and check scopes against the endpoint's required permissions. For high-value APIs, bind tokens to the device with DPoP (RFC 9449) or mTLS — a stolen token then becomes useless on any other device.
Input Validation & Output Encoding
Validate every input server-side — never trust the client. Use schema validators (Zod, Joi, Pydantic, JSON Schema) at the API boundary. For SQL, always use parameterized queries or an ORM with prepared statements; string concatenation for SQL is an immediate CVE. For output, encode contextually (HTML for web, JSON escape for APIs). Reject rather than sanitize — silent "sanitization" hides attacks.
Rate Limiting & Abuse Prevention
Every public API endpoint needs rate limiting. Use a multi-layered approach: global limits at the WAF/CDN (CloudFlare, AWS WAF, Fastly), per-user limits in application middleware, and per-operation limits for expensive operations (password reset, OTP send, file upload). For authentication endpoints, implement progressive delays and account lockouts to defeat credential stuffing. Monitor for anomalies — a single user suddenly making 10,000 requests is almost certainly compromised.
API-Specific OWASP Top 10 (2023 Edition)
The OWASP API Security Top 10 is the mobile backend's companion to the Mobile Top 10. Key risks: BOLA (Broken Object Level Authorization — user A accessing user B's data by changing an ID), broken authentication, excessive data exposure, unrestricted resource consumption, mass assignment, and security misconfiguration. BOLA alone causes the majority of headline mobile breaches every year.
| Control | Implementation | Example |
|---|---|---|
| TLS 1.3 everywhere | HTTPS enforced at load balancer, HSTS headers, HTTP redirects to HTTPS | AWS ALB with ACM cert + HSTS max-age=31536000 |
| OAuth 2.1 / OIDC | Short access tokens, refresh rotation, PKCE on mobile clients | Auth0, Okta, Supabase Auth, AWS Cognito |
| Object-level authorization (BOLA) | Verify the authenticated user owns the resource on every request | WHERE user_id = auth.uid() in Supabase RLS |
| Rate limiting | Per-IP, per-user, per-endpoint | CloudFlare WAF + Redis token bucket |
| Input validation | Schema validation at API boundary, parameterized queries | Zod + Prisma on Node, Pydantic + SQLAlchemy on Python |
| Logging & monitoring | Structured logs, anomaly detection, alert on 4xx/5xx spikes | Datadog, Sentry, CloudWatch, Supabase logs |
| API gateway + WAF | Centralized policy enforcement, DDoS protection | AWS API Gateway + WAF, CloudFlare, Kong |
| Secrets management | Never hardcode, rotate quarterly, least-privilege | AWS Secrets Manager, HashiCorp Vault |
Design as if every API request came from a hostile Burp Suite user. That is the only safe mental model — because in production, some of them will.
— Frenchy Digital API Engineering Playbook
Penetration Testing & MASVS
Shipping a mobile app without a penetration test is like shipping a building without a structural inspection — it may look fine, but you will not know what is broken until something collapses. A mature mobile security program combines continuous automated testing with periodic third-party penetration tests, all anchored to an industry methodology like OWASP MASVS.
OWASP MASVS (Mobile Application Security Verification Standard)
MASVS defines three verification levels: L1 (minimum baseline, suitable for most consumer apps), L2 (defense-in-depth for apps handling sensitive data), and R (resilience against reverse engineering, for apps where IP or DRM matters). Each level specifies controls across storage, cryptography, authentication, network, platform interaction, code quality, and resilience. Ask your pentest vendor to report against MASVS — it produces an apples-to-apples comparison across years and vendors.
OWASP MASTG (Mobile Application Security Testing Guide)
MASTG is MASVS's operational companion — it catalogs specific test cases, tools, and techniques for iOS and Android. Every test in your pentest scope should map back to a MASTG test case; this makes findings reproducible and remediation verifiable.
| Test Type | When to Run | Tools | What It Catches |
|---|---|---|---|
| SAST (Static Analysis) | Every CI build | Semgrep, CodeQL, MobSF, SonarQube | Hardcoded secrets, insecure API calls, obvious OWASP issues |
| SCA (Software Composition Analysis) | Every CI build | Snyk, GitHub Dependabot, OWASP Dependency-Check | Vulnerable third-party SDKs and libraries (CVEs) |
| DAST (Dynamic Analysis) | Nightly against staging | Burp Suite, OWASP ZAP, MobSF dynamic | API vulnerabilities, authentication flaws, runtime issues |
| IAST (Interactive) | During QA cycles | Contrast, Checkmarx IAST | Combined static + runtime, lower false positives |
| Manual pentest | Every major release, annually minimum | Third-party firm, MASTG methodology | Business logic flaws, chained vulnerabilities, novel issues |
| Bug bounty | Continuous (post-launch) | HackerOne, Bugcrowd, Intigriti | Long-tail issues from diverse researcher perspectives |
| Red team / adversary simulation | Annually for high-value apps | Internal red team or specialized firm | End-to-end attack chains, assume-breach scenarios |
- Pentest scope: mobile binary + backend APIs + auth flows + business logic — not just the app
- MASVS L1 is the minimum; L2 for anything handling PII/PHI/payments; R for high-IP or DRM apps
- Critical findings must be remediated before launch; high findings within 30 days; medium within 90
- Retest after remediation — a 'fixed' finding that still exists is the worst audit outcome
- Keep a remediation ledger per release for regulatory (HIPAA, PCI DSS) audits
CI/CD Security Integration
Shift security left by integrating scans into CI/CD. Every pull request should run SAST and SCA gates that block merges on critical findings. Every nightly build should run DAST against staging. Every release candidate should be submitted for manual penetration testing. Automate what you can; reserve humans for what they do best — finding business logic flaws and chained vulnerabilities that scanners miss.
Compliance: HIPAA, PCI DSS, CCPA, GDPR
In 2026, compliance is no longer optional overhead — it is a product requirement and a material business risk. Fines under GDPR and CCPA/CPRA have eclipsed the average cost of a breach itself. Regulated industries — healthcare, finance, payments, children's services — have hard legal obligations that must be designed into the app from day one, not bolted on before launch.
| Regulation | Applies To | Key Mobile Requirements | Max Penalty |
|---|---|---|---|
| HIPAA / HITECH | Healthcare apps (US) handling PHI | Encryption at rest & in transit, access controls, audit logs, BAAs with vendors, breach notification | $2.1M per violation category per year + criminal liability |
| PCI DSS 4.0 | Apps processing, storing, or transmitting cardholder data | Scope minimization (tokenization), SAQ/ROC assessment, annual pentest, secure SDLC | $5K–$100K/month from card networks + acquiring bank termination |
| CCPA / CPRA | Businesses serving California residents | Privacy notice, right to know/delete/correct, opt-out of sale/sharing, GPC signal support | $2,500/violation, $7,500/intentional or minor violation |
| GDPR | Any app reaching EU residents | Lawful basis, DPIA, DPO (sometimes), 72h breach notification, data subject rights, DPAs | €20M or 4% of global annual revenue, whichever is higher |
| COPPA | Apps directed to children under 13 (US) | Verifiable parental consent, minimized data collection, limited third-party sharing | $51,744 per violation (2024 tier) |
| SOC 2 Type II | B2B SaaS mobile apps (contractual, not legal) | Annual audit, documented controls across Security/Availability/Confidentiality | Loss of enterprise contracts |
| FTC Act Section 5 | All US consumer apps | Deceptive practices enforcement — promise what you do and do what you promise | Unlimited — varies by case |
HIPAA (US Healthcare)
If your mobile app handles Protected Health Information — patient names linked to diagnoses, medications, appointments, biometric data — HIPAA applies. Required controls include encryption at rest and in transit (the "addressable" standard is effectively mandatory post-2013 HITECH), unique user identification, emergency access procedures, automatic logoff, audit logs retained for 6 years, and Business Associate Agreements (BAAs) with every vendor touching PHI (cloud providers, analytics, SMS gateways). Frenchy Digital has delivered HIPAA-compliant telemedicine apps — see our healthcare app development guide.
PCI DSS 4.0 (Payment Cards)
If your mobile app handles raw cardholder data, PCI DSS 4.0 applies — and it is painful. The practical path for 99% of mobile apps is scope minimization: use Stripe, Adyen, Braintree, or Apple Pay / Google Pay and never touch a PAN (Primary Account Number) yourself. Payment SDKs handle the PCI-regulated surface inside their own compliance boundary. Your app only sees a tokenized reference. This reduces your PCI scope from a full ROC to the minimal SAQ-A questionnaire. See our fintech app development guide for the architecture patterns.
CCPA / CPRA (California)
CCPA and its successor CPRA apply to any business serving California residents that meets revenue or data volume thresholds. Requirements: clear privacy notice at collection, the right to know/delete/correct, the right to opt out of sale or sharing of personal information, support for the Global Privacy Control (GPC) signal, and non-discrimination. In mobile apps, this typically means an in-app privacy settings screen, a "Do Not Sell or Share My Personal Information" link, and engineering support for data export and deletion.
GDPR (European Union)
GDPR applies the moment your app is available in the EU — no EU office required. You must establish a lawful basis (usually consent or legitimate interest) for every processing activity, document a Data Protection Impact Assessment (DPIA) for high-risk processing, offer data subject rights (access, rectification, erasure, portability, objection), notify breaches within 72 hours, sign Data Processing Agreements with all processors, and handle international data transfers under Standard Contractual Clauses or adequacy decisions. Max penalty: €20M or 4% of global annual revenue. For cross-border products, GDPR sets the global floor.
- Map every compliance requirement to a specific technical control and document the evidence
- For HIPAA: encrypted at rest, encrypted in transit, audit logs, BAAs with all PHI-touching vendors
- For PCI DSS: tokenize via Stripe/Adyen/Apple Pay — stay out of the PAN scope entirely if possible
- For CCPA/CPRA: in-app opt-out, GPC signal support, data export and deletion workflows
- For GDPR: lawful basis documented per processing, DPIA on high-risk features, 72h breach notification plan
- Appoint internal owners — privacy, security, compliance — and run tabletop exercises quarterly
- Keep a SOC 2 / ISO 27001 program if you sell to enterprise — it accelerates sales cycles materially
Organizations with comprehensive security AI and automation saved an average of $2.2M per breach compared to those without. Compliance is not a cost center — in 2026, it is a cost-avoidance multiplier.
— IBM Cost of a Data Breach Report 2026
How Frenchy Digital Secures Mobile Apps
Security is not a feature we add at the end — it is a default we build in from discovery. At Frenchy Digital, every mobile app engagement includes threat modeling in the discovery phase, secure-by-default architectural choices, automated scanning in CI/CD, pre-launch third-party penetration testing, and post-launch monitoring. Our engineering team includes alumni of Google, Meta, YouTube, and Snapchat — each of whom has shipped production security controls at consumer scale.
Threat Modeling First
Before we write a line of code, we run a STRIDE-based threat modeling session with product and engineering. We map the attack surface (binary, APIs, third-party SDKs, admin tooling), identify assets worth defending (user data, payment flows, business secrets, IP), enumerate threats, and prioritize mitigations. The output is a living threat model that every later design decision is checked against.
Secure-by-Default Architecture
All our apps ship with TLS 1.3, hardware-backed key storage, short-lived JWTs with refresh rotation, OAuth 2.1 / OIDC via Auth0 or Supabase Auth, WAF-fronted APIs, and OWASP MASVS L1 baseline (L2 for regulated apps). React Native / Flutter projects use platform-native security modules — we never trust JavaScript-only security libraries for authentication or cryptography.
Continuous Security in CI/CD
Every pull request runs SAST (Semgrep, CodeQL), SCA (Snyk, Dependabot), secret scanning (gitleaks, TruffleHog), and linting gates. Nightly DAST scans hit staging. Before every major release, we submit to a third-party pentest firm that reports against OWASP MASVS. Findings feed a remediation ledger with SLAs: critical before release, high within 30 days, medium within 90.
Post-Launch Monitoring
Launch day is where the clock starts, not stops. We instrument apps with Sentry for crash and error tracking, Datadog for API monitoring, and custom security telemetry for authentication anomalies, token abuse, and pin validation failures. Incident response runbooks are pre-written; on-call engineers can revoke tokens, rotate secrets, and push emergency config changes within minutes. For regulated clients, we maintain a compliance evidence vault (audit logs, DPIAs, pentest reports) that is ready for any auditor.
Whether you are building a HIPAA-compliant healthcare app, a fintech or payment platform, or a consumer mobile app, our approach is the same: assume breach, defend in depth, measure everything. And because every app is ultimately an interface to an API, we pair this guide with our API development best practices — the two disciplines are inseparable in 2026.
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