Most Kotlin apps look clean and safe — but the truth is:
Clean Kotlin code ≠ Secure Kotlin code
Null-safety won’t protect you from:
- 🔐 Token & credential theft
- 🌐 MITM network attacks
- 🕵 Reverse engineering & logic bypass
- 📦 Supply-chain dependency issues
- ⚠ Runtime tampering (root/emulator/debugger)
Common mistakes Kotlin developers still make
- Storing sensitive data in plain
SharedPreferences - No certificate pinning or weak TLS configuration
- Hardcoded keys & tokens inside code
- Blind trust in deep links and backend responses
- Minimal or no obfuscation & anti-tamper mechanisms
A stronger baseline for 2025
- Use EncryptedSharedPreferences + Keystore
- Enforce TLS 1.3 + certificate pinning
- Add Play Integrity API & tamper protection
- Enable R8 obfuscation + runtime detection
- Validate all external input, every time
Read the full article here 👇
What’s the most ignored security practice you’ve seen in Kotlin/Android teams?
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