Mobile and application security: iOS and Android threat models, iOS Secure Enclave and Android Keystore / StrongBox, biometric APIs, platform attestation, RASP and anti-tamper, certificate pinning, and hands-on mobile reverse engineering (Frida, objection, MobSF)
Applied cryptography at review-level depth: BIP-32 / BIP-39 / BIP-44, ECDSA over secp256k1, AES...
