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Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →To use SSH keys from an Android phone or iPhone, create or import a key pair in a mobile SSH app, add the matching public key to your server account, and connect with the corresponding private key kept on your phone. The exact menus, supported key types, and storage protections vary by app.
What you need before setting up SSH keys
Have the server hostname or IP address, SSH port, username, and a way to add a key to that account. SSH key authentication uses a matched pair: the server account authorizes the public key, while the client uses the private key to prove it has the matching identity. The private key is not the key to upload or share.
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Choose a mobile SSH client that supports your phone and the key type your server accepts. For example, Blink documents key creation on iOS; Mobile SSH documents Android and iOS workflows; and Termius advertises key generation and import. Those are examples, not interchangeable instructions for every app.
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How to set up SSH keys on Android or iPhone
- Choose how to get a key pair. Generate a new pair inside your SSH app, or import an existing private key. In Blink’s iOS guide, the path is
config>Keys>+>Generate New; its guide also describes naming and managing multiple keys. Mobile SSH supports pasting a private key or importing one with the system file picker. Other apps use different menus. - Check algorithm compatibility. The app and server must both support the key type. Mobile SSH lists Ed25519, ECDSA, and RSA on Android, and Ed25519 and ECDSA on iOS; it does not support DSA. Blink’s standard iOS key guide lists Ed25519, ECDSA, and RSA. These are product-specific support lists, not a universal mobile-app matrix.
- Add the public key to your server account. Use the server provider’s documented method to authorize the public key for your username. Blink documents
ssh-copy-id identity_file user@hostin its environment. Where that command is not available, use the provider’s supported process for adding the public key to the account’s authorized keys. Never upload the private key in place of the public one. - Protect the private key. Keep it on the phone or in a trusted encrypted backup, and set a passphrase when appropriate. If importing an encrypted key in Mobile SSH, enter its passphrase in the password/passphrase field. If import fails, check the key format and the app’s algorithm support before generating a replacement or changing server security settings.
- Set up the server connection and select the identity. Enter the hostname or IP address, port, and username. Select the imported or generated identity if the app does not choose it automatically. Key-based login will not work until the corresponding public key is authorized for that server account.
- Verify the server host key on first connection. When the app shows an unknown host key, compare its fingerprint with one obtained through a trusted channel, such as your administrator or provider, before accepting. Do not blindly accept a changed host key: a change can be legitimate, but it can also indicate that the connection is reaching a different server.
Android setup notes
Mobile SSH documents pasting a private key or importing one through Android’s system file picker. Its Android support list includes Ed25519, ECDSA, and RSA. Other Android SSH apps can have different import flows and algorithm support, so check the chosen app’s documentation rather than assuming those details apply across the platform.
#1 Best Overall
- POWERFUL SECURITY KEY: The Security Key C NFC is the essential physical passkey for protecting your digital life from phishing attacks. It ensures only you can access your accounts.
- WORKS WITH 1000+ ACCOUNTS: Compatible with Google, Microsoft, and Apple. A single Security Key C NFC secures 100 of your favorite accounts, including email, password managers, and more.
- FAST & CONVENIENT LOGIN: Plug in your Security Key C NFC via USB-C and tap it, or tap it against your phone (NFC) to authenticate. No batteries, no internet connection, and no extra fees required.
- TRUSTED PASSKEY TECHNOLOGY: Uses the latest passkey standards (FIDO2/WebAuthn & FIDO U2F) but does not support One-Time Passwords. For complex needs, check out the YubiKey 5 Series.
- BUILT TO LAST: Made from tough, waterproof, and crush-resistant materials. Manufactured in Sweden and programmed in the USA with the highest security standards.
Termius documents Android biometric-protected, device-bound key features. That is a vendor-specific option; check the app’s own documentation for its current behavior and availability.
iPhone setup notes
Mobile SSH documents Ed25519 and ECDSA support on iOS and says iOS secrets are kept in the system Keychain. Blink’s iOS guide describes ordinary SSH keys and a separate Secure Enclave option. Blink says its regular iOS keys are held in iOS Keychain with Secure Enclave encryption, while Secure Enclave keys are non-extractable. These descriptions apply to those clients and should not be read as a guarantee about every iPhone SSH app.
Rank #2
- POWERFUL SECURITY KEY: The YubiKey 5C NFC is the most versatile physical passkey, protecting your digital life from phishing attacks. It ensures only you can access your accounts
- WORKS WITH 1000+ ACCOUNTS: Compatible with popular accounts like Google, Microsoft, and Apple. A single YubiKey 5C NFC secures 100+ of your favorite accounts, including email, password managers, and more
- FAST & CONVENIENT LOGIN: Plug in your YubiKey 5C NFC via USB and tap it, or tap it against your phone (NFC), to authenticate. No batteries, no internet connection, and no extra fees required
- MOST SECURE PASSKEY: Supports FIDO2/WebAuthn, FIDO U2F, Yubico OTP, OATH-TOTP/HOTP, Smart card (PIV), and OpenPGP. That means it’s versatile, working almost anywhere you need it
- PRIMARY & SPARE KEYS: Just like having a spare house key, we recommend buying two YubiKeys - one for daily use and one as a spare. That way you’ll never get locked out of your accounts
Optional: WebAuthn passkeys and external security keys on iPhone
Conventional SSH keys are sufficient for ordinary public-key login; passkeys and external security keys are optional alternatives. Blink documents creating an iOS passkey through config > Keys > + > Passkeys, then adding its public key to the server. This is not a standard OpenSSH private-key file: Blink says the private key cannot be read, and the server uses a WebAuthn-compatible SSH key type.
Blink’s documentation says its server needs OpenSSH newer than 8.2 for WebAuthn keys and notes that the OpenSSH version shipped with macOS may not include the required support. Blink also documents external security keys, including NFC models on iPhone and USB-C models on iPad. Before relying on this route, verify compatibility across the client, operating system, server build, and exact security-key model. A YubiKey is not required for a conventional SSH-key setup.
Rank #3
- FIDO2 & Passkey Ready: Business-ready and FIDO2 L1 certified. This key is supported by major management suites and is ideal for both individual and enterprise deployment. Works seamlessly with Gmail, Facebook, GitHub, Dropbox, Coinbase, and more.
- Dedicated Manager App: Use the Thetis Manager App for the initial hardware PIN setup. Setting the PIN on the device first ensures a smooth registration process. Once the PIN is configured, you can begin registering the key across your favorite FIDO2-compatible online services.
- USB TYPE C Connectivity & DONGLE Design: Designed for PCs, Macs, laptops, iPhones, and Android devices that utilize a USB-C port. Plug and stay, or carry it on a keychain. (Item Size: 0.73 x 0.60 x 0.30 inches)
- Enhanced MFA (FIDO2 & TOTP/HOTP): Strengthen your security with flexible options. Use the Manager App to access TOTP/HOTP features for accounts that do not yet support FIDO2.
- Check FIDO2 compatibility before purchase - Known limitations: ID Austria is not supported (requires FIDO2 Level 2). Windows Hello login only works with Windows Enterprise editions that support Entra ID. NFC functionality is not supported.
How to choose a mobile SSH client
Compare the capabilities that affect your setup rather than assuming that all mobile clients handle keys alike:
- Can it generate a key pair, import a private key, or both?
- Which key algorithms does it support on your specific operating system?
- Where does it store private keys, and does it synchronize them to other devices?
- Does it offer biometric or hardware-backed keys, and what are the limits of those features?
- How does it handle first-time host verification and a host key that later changes?
- Is it currently available for your device and operating-system version?
For example, Termius describes a separate cross-device vault that encrypts private keys client-side with a master password before synchronization. That is distinct from local-only storage descriptions from other vendors. The documentation cited here establishes selected product capabilities, not independent security testing or a complete current comparison of app plans and prices.
Rank #4
- POWERFUL SECURITY KEY: The YubiKey 5C Nano is the most versatile physical passkey, protecting your digital life from phishing attacks. It ensures only you can access your accounts
- WORKS WITH 1000+ ACCOUNTS: Compatible with popular accounts like Google, Microsoft, and Apple. A single YubiKey 5C Nano secures 100+ of your favorite accounts, including email, password managers, and more
- FAST & CONVENIENT LOGIN: The YubiKey 5C Nano is designed to stay plugged into your device via USB-C. Simply tap it to authenticate. No batteries, no internet connection, and no extra fees required
- MOST SECURE PASSKEY: Supports FIDO2/WebAuthn, FIDO U2F, Yubico OTP, OATH-TOTP/HOTP, Smart card (PIV), and OpenPGP. That means it’s versatile, working almost anywhere you need it
- PRIMARY & SPARE KEYS: Just like having a spare house key, we recommend buying two YubiKeys - one for daily use and one as a spare. That way you’ll never get locked out of your accounts
Sources and platform requirements
Product behavior and requirements can change. Mobile SSH’s getting-started documentation states Android 8.0+ and iOS 16+ and describes test or beta distribution; check its current distribution and requirements before installing. Consult each vendor’s documentation for the exact workflow and supported options:
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