Cipher App | Encrypt Text File vs Keypo

The app helps you protect confidential information such as passwords, crypto keys, and recovery phrases using strong encryption while keeping everything accessible across your devices. Whether you store personal notes, mnemonic phrases, or sensitive text files, Cipher App ensures your data stays private and under your control. Why use Cipher App Protect sensitive data, sync it across all your devices, have fast access to decrypted data by password. Securely store private keys, mnemonic (seed) phrases, and access codes in encrypted form, protected by your own passwords. No one can access your files without your password. Passwords are never stored on the device or in the cloud Strong encryption for peace of mind Your data is encrypted using reliable AES-based encryption. Each file is protected individually, reducing risk and increasing control. Access from any device Cloud sync allows you to access encrypted content across devices using your Apple or Google account. Works offline Create, edit, and view encrypted content without an internet connection. Sync happens automatically when you’re back online. Key features - Encrypt notes, texts, passwords, crypto keys, and recovery phrases - Import text files for encryption - Search across encrypted items - Cloud Sync Cipher App is designed for people who value privacy and control over sensitive data. Keep your notes, crypto-related information, and confidential texts encrypted and protected.

The most secure way to backup your crypto seed phrase. This app stores one encrypted piece of your seed phrase as part of Keypo's 2-of-3 recovery system. Your share is protected by Face ID and the Secure Enclave—it never touches the cloud. Requires Keypo for Desktop to get started: keypo.io/macos WHAT IS KEYPO? Paper backups get lost. Password managers get hacked. Custodians can freeze your accounts. Keypo is a new way to recover your seed phrases that is self custody without a single point of failure. Keypo splits your seed phrase into pieces across devices you already own: your Mac, your iPhone, and your YubiKey (optional). Each piece is encrypted with the device's highest security features, the Secure Enclave, and can only be decrypted using Touch ID (on your Mac), Face ID (on your iPhone) and a PIN (on your Yubikey). Lose one device? Recover your full seed phrase with any two. Your seed phrase never touches the cloud, we never collect any personal information, and there's no single point of failure. HOW IT WORKS 1. Enter your seed phrase on your Mac using Keypo for Desktop 2. Keypo splits it into 3 pieces using Shamir's Secret Sharing 3. One piece is sent to this iPhone app, encrypted with Face ID. The other two pieces are encrypted by your Mac using Touch ID and your Yubikey using a PIN. 4. Recover anytime with any 2 of 3 devices No single piece reveals anything about your seed phrase. Even if one device is stolen, your seed phrase stays safe. WHAT THIS APP DOES • Receives and stores your encrypted share from the Keypo for Desktop app • Protects your share with Face ID authentication • Sends your share back to your Mac when you need to recover SECURITY YOU CAN TRUST • Secure Enclave encryption on Mac and iPhone • YubiKey hardware security key support • Touch ID and Face ID authentication • No cloud sync—your secrets never leave your devices • No master password to remember or lose • Shamir's Secret Sharing (2-of-3 threshold cryptography). Keypo uses Privy's Shamir secret sharing library, which is open-sourced, audited and has zero external library dependencies: https://github.com/privy-io/shamir-secret-sharing WORKS WITH ANY WALLET Keypo works with any BIP-39 seed phrase—Bitcoin, Ethereum, Solana, and thousands of other assets. If your wallet gave you 12, 18, or 24 words, Keypo can protect them. ALSO PROTECTS • Recovery codes (1Password, Authy, iCloud, etc.) • API keys and private keys • Any sensitive text up to 1,024 characters REQUIREMENTS • Mac with Touch ID running macOS 14.0 (Sonoma) or later • iPhone with Face ID running iOS 17.6 or later • Keypo iOS companion app (free): keypo.io/ios • YubiKey 5 Series (optional but recommended) SUPPORT Questions? Contact us at dave@keypo.io