Ressl Auth

Ressl Auth is a privacy-first authenticator for your two-factor (2FA) codes — built around zero-knowledge, end-to-end encryption. Your TOTP secrets are encrypted on your device with a key only you hold, so they stay private even from the server that syncs them. WHY RESSL AUTH • Zero-knowledge by design — your vault is encrypted on-device with AES-256; the server stores only ciphertext and can never read your codes. • Strong key derivation — your passphrase is stretched with Argon2id before it ever protects your data. • You stay in control — connect to the Ressl Auth service or host the open backend yourself. FEATURES • Generate time-based one-time passwords (TOTP) for all your accounts • Add entries by scanning a QR code or entering a key manually • Organize accounts into groups and find them instantly with search • Face ID / Touch ID lock for your vault • Sign in with a passkey • Universal Clipboard — copy a code on iPhone, paste on your Mac; codes auto-expire after use • Optional service icons, fetched only when you choose PRIVACY FIRST We can't see your codes, your secrets, or your account names — everything sensitive is encrypted before it leaves your device. No tracking. No ads. Ressl Auth is designed for iOS 26 with a clean, modern interface.