Code Quality and Tampering

Mobile applications distributed through app stores can be reverse-engineered, modified, and redistributed. Poor code quality and lack of anti-tampering measures make applications vulnerable to various attacks.

Code-Related Vulnerabilities:

Hardcoded secrets and API keys
Debug code left in production
Verbose error messages revealing system information
Unobfuscated code exposing business logic
Missing integrity checks
Disabled platform security features

Anti-Tampering Implementation:

// Android - Basic integrity check
fun verifyAppIntegrity(context: Context): Boolean {
    try {
        val packageInfo = context.packageManager.getPackageInfo(
            context.packageName, 
            PackageManager.GET_SIGNATURES
        )
        
        val signatures = packageInfo.signatures
        val expectedSignature = "YOUR_APP_SIGNATURE_HERE"
        
        for (signature in signatures) {
            val signatureHash = MessageDigest.getInstance("SHA-256")
                .digest(signature.toByteArray())
                .toHexString()
            
            if (signatureHash != expectedSignature) {
                return false
            }
        }
        return true
    } catch (e: Exception) {
        return false
    }
}