The Coding Sprite

But the more I’ve learned about cybersecurity, the more I’ve realised something important:

If you’re an iOS developer, the OWASP Mobile Top 10 isn’t just “security stuff”.

It’s your stuff. It’s the difference between building an app that’s fun and functional and building an app that’s safe, trustworthy, and genuinely protects your users. And the best part? You don’t need to be a security expert to understand it.

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So… what is the OWASP Mobile Top 10?

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OWASP (Open Worldwide Application Security Project) is a global community focused on improving software security. Every few years, they publish a list of the 10 most critical security risks in mobile apps.

Think of it as:

• a roadmap
• a checklist
• a “please don’t accidentally break your users’ trust” guide

It’s not about scaring you. It’s about helping you avoid the mistakes that everyone makes, especially when they’re moving fast or learning on the job.

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“But iOS is secure by default… right?”

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Yes…and no. iOS gives you a lot of security for free:

• sandboxing
• Keychain
• Secure Enclave
• strict permission controls
• encrypted storage
• hardened APIs

But here’s the catch. Apple can secure the platform, but they can’t secure your code.

You can still:

• store sensitive data in the wrong place
• leak information through logs
• misuse cryptography
• trust user input too much
• expose APIs
• accidentally weaken your own app

The OWASP Mobile Top 10 helps you avoid exactly that.

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Why iOS developers should care (even if you’re not “into” security)

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Because your users trust you with their data. When someone downloads your app, they’re handing you:

• their location
• their photos
• their habits
• their identity
• sometimes even their money

That trust is fragile. One mistake can break it and your reputation. OWASP helps you protect that trust and thus you as a iOS developer.

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Because security bugs are harder to fix later

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A security flaw isn’t like a UI bug. You can’t just patch it quietly and move on.

Security issues often require:

• architectural changes
• data migration
• rethinking how your app works
• sometimes public disclosure

Catching them early saves you time, stress, and embarrassment.

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Because the App Store does care

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Apple won’t tell you “you violated OWASP M1”, but they will reject apps that:

• store data insecurely
• misuse permissions
• expose sensitive information
• communicate over insecure channels

Understanding OWASP helps you avoid those rejections.

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Because it makes you a better developer

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Security isn’t a separate skill. It’s part of writing good software. When you understand the OWASP risks, you naturally start writing:

• cleaner code
• safer code
• more thoughtful code

It changes how you think, for the better.

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Because attackers don’t care that you’re “just an iOS dev”

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You don’t need to be a big company to be a target.

Sometimes attackers:

• automate scanning
• look for common mistakes
• exploit predictable patterns
• target small apps because they’re easier

OWASP helps you avoid the low‑hanging fruit.

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A quick breakdown of the OWASP Mobile Top 10 (iOS edition)

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Here’s the non‑scary version, the one I wish I’d had when I started.

1. Improper Credential Handling

Storing passwords or tokens in the wrong place. (Use Keychain. Always.)

2. Insecure Communication

Not validating certificates or using plain HTTP. (Use HTTPS + certificate pinning when needed.)

3. Insecure Authentication

Trusting the client too much. (Authentication belongs on the server& do not trust anyone, zero trust always.)

4. Insufficient Cryptography

Rolling your own crypto or using outdated algorithms. (Please don’t reinvent AES.)

5. Insecure Authorisation

Letting users access things they shouldn’t. (Always check permissions server‑side and keep access only to those who truly need it.)

6. Poor Platform Usage

Ignoring iOS security features. (Use Keychain, Secure Enclave, App Transport Security, etc.)

7. Insecure Data Storage

Saving sensitive data in UserDefaults or plain files. (Just… no, never do this!)

8. Code Tampering

Attackers modifying your app. (Use integrity checks and avoid exposing secrets.)

9. Reverse Engineering

Your code being decompiled. (Don’t put secrets in the app. Ever.)

10. Extraneous Functionality

Debug endpoints or leftover test code. (Delete them before shipping.)

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You don’t need to memorise the list — you just need to care

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The OWASP Mobile Top 10 isn’t a test. It’s not a certification. It’s not a gatekeeping tool. It’s a reminder.

A reminder that:

• security is part of development
• users trust you
• mistakes happen
• and you can prevent most of them with a little awareness

You don’t need to be perfect. You just need to be intentional.

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Final thought: Security isn’t a feature, it’s a responsibility

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If you care about your craft like me, and I know you do… then caring about security is just part of the journey.