SIGNALBALL AUTH SDK
Passwordless. Device-Bound. Phishing-Resistant.
The Signalball Auth SDK replaces passwords, TPINs, OTP dependency and insecure approval flows with cryptographic authentication: passkeys, biometric approval, device binding and strong transaction authorization. Engineered for banking, digital wallets, fintech and enterprise applications — where identity is the perimeter.
Diagram: the customer approves a transfer with biometrics on their own device, the signature is verified by Signalball against the registered public key, and the bank executes the transaction. An attacker with a stolen password or intercepted OTP is blocked: no registered device means no signature.
In plain terms
Security your customers never have to think about
Passwords, OTP codes and TPINs are the weakest link in every digital service: they can be phished, intercepted, guessed or reused. The Auth SDK removes them entirely. Your customers sign in and approve operations with their fingerprint or face, and every approval is cryptographically tied to their personal device — so a criminal with a stolen password or an intercepted SMS code has nothing to work with.
For your business this means dramatically fewer account takeovers, lower fraud losses, no more SMS OTP costs, and a faster login experience customers actually enjoy — while meeting the strictest regulatory requirements for customer authentication.
A complete SDK surface for modern identity
Passwordless Login
Authenticate users without passwords, TPINs or repeated OTP challenges — cryptographic challenge-response replaces every shared secret.
Passkey-Based Authentication
FIDO2 / WebAuthn authentication built on public-private key cryptography, across customer and workforce journeys.
Device Binding
User identity is bound to a trusted device through secure cryptographic registration — private keys held in the Secure Enclave or TEE.
Biometric Approval
Face ID, Touch ID, fingerprint or secure device unlock — approval happens on the trusted device, never in the network.
Transaction Signing
Transaction-specific challenges signed for transfers, payments, beneficiary additions and sensitive profile changes.
Anti-Cloning Protection
Detects copied app data, modified device state, runtime tampering, emulators and abnormal integrity signals.
Risk-Based Controls
Extra verification driven by device, session, geography, behavior, transaction value and institutional policy.
Fallback Orchestration
Controlled fallback journeys when the trusted device or biometric approval is unavailable — without reopening OTP holes.
Audit Logs & Reporting
Complete logs for registration, authentication, approvals, failures, device changes and administrative actions.
Challenge-response in five steps
The private key never leaves the device.
Step 01
Challenge
The backend generates a unique challenge for every login or transaction.
Step 02
User Approval
The user confirms through biometric or secure device authentication.
Step 03
Private-Key Signature
The SDK signs the challenge directly on the trusted device.
Step 04
Server Verification
The backend validates the signature against the registered public key.
Step 05
Policy Decision
The action is approved, rejected or escalated based on risk.
One SDK, every channel your customers use
Native Mobile SDKs
Android and iOS device binding, biometric approval, local integrity checks and challenge signing.
Web
Browser-based passkey and WebAuthn authentication for customer and workforce journeys.
React Native & Flutter
Cross-platform integrations for faster mobile delivery without weakening the trust model.
Backend APIs
Registration, challenges, signature verification, device registry, policy and audit events.
Admin Console
Manage users, devices, policies, logs, risk events and operational monitoring.
Kill Switch
Disable compromised devices, risky sessions or selected authentication flows instantly.
Where the Auth SDK delivers value
The same cryptographic layer adapts to every industry where accounts, money or digital assets are at stake.
Banking
Stop account takeover in retail and corporate banking. Customers sign in with biometrics and every wire transfer is individually signed on their own device — phishing kits and OTP-interception attacks simply stop working.
Fintech & Wallets
Onboard users with passkeys in seconds, protect stored balances and cards, and sign every payment instantly — without paying for SMS OTPs or losing users on friction-heavy login screens.
Gaming & iGaming
Player accounts hold real value: balances, items, winnings. Device-bound login blocks credential stuffing and account resale, while frictionless biometric access keeps players in the game.
Brokers & Trading
Protect trading accounts where seconds matter. Orders, withdrawals and portfolio changes are approved biometrically on the owner's device — preventing unauthorized trades from compromised accounts.
Telecom
Secure self-care apps and eSIM operations, and retire SMS OTP as an insecure, costly channel. Device binding neutralizes SIM-swap fraud at the exact point where it starts.
