Anti-Phishing Code in Mobile Crypto App

TRUETECH is engaged in the development, support and maintenance of iOS, Android, PWA mobile applications. We have extensive experience and expertise in publishing mobile applications in popular markets like Google Play, App Store, Amazon, AppGallery and others.
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Anti-Phishing Code in Mobile Crypto App
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Anti-Phishing Code Implementation in Mobile Crypto App

Anti-phishing code — personalized label user sets themselves, app shows on every sensitive operation screen. If code doesn't match what user expects — they know it's fake. Simple mechanics, but correctly implementing more complex than seems.

What Exactly It Protects

Attack scenario: attacker clones your app, uploads to unofficial store. Visually — identical. User installs, enters seed phrase — keys compromised. Anti-phishing code — unique string (usually 4–8 characters or emoji) user only knows and clone can't show correctly. User gets used to seeing, e.g., "🦊🌙" next to balance and immediately notices fake.

Implementation

Code entered on first launch and saved in Keychain / KeyStore — not UserDefaults / SharedPreferences. Shown on:

  • Main screen next to balance
  • Transaction confirmation screen
  • Seed phrase / private key display screen

Must display always, not just on first login. User must develop habit of checking it.

Code shouldn't transmit to server — local device secret. If app restored via iCloud Backup — code restores with Keychain. On manual recovery via seed phrase on new device — user sets new code.

Input code — secureTextEntry = false (not password, user must see what entering), maximum length 10–12 characters. Emoji support desirable — visually more distinct than letters.

Timeline — 1–3 days: input and display UI, protected storage, integration on needed screens, recovery handling.