Knowledge base | Ledger

General Ledger Nano S FAQ

What is the Ledger Nano S?

Ledger Nano S is a secure Bitcoin and Ethereum hardware wallet. It connects to any computer through USB and embeds a built-in OLED display to double-check and confirm each transaction with a single tap on its side buttons.

What crypto currencies are supported by the Nano S?

Crypto currencies are regularly added to the Nano S, so the list is always evolving. To add a new released coin, you need to install the app from the Ledger Manager (which manages firmware upgrade and app install/uninstall).

The current list of supported cryptos is:

  • Bitcoin
  • Ethereum / Ethereum Classic
  • Ripple
  • Litecoin
  • Dogecoin
  • Zcash (z-addresses are not supported)
  • Dash
  • Stratis
The following cryptos are in our roadmap but not implemented yet:
  • Monero
All cryptos (except Ethereum) must be used with the Ledger Wallet Bitcoin Chrome application. Just launch it, select the crypto app on your device (by pressing both buttons) and the Chrome app will adapt to the currency you chose.
 

What are the differences with the Nano?

Nano S is the latest generation hardware wallet available from Ledger. There are many differences in the security architecture, the firmware and the available features. Nano S has a screen and two buttons. Everything is done directly on device: PIN entry, seed configuration, transaction validation. There is no need for an additional security card like for the Nano or HW.1. Furthermore Nano S can manage multiple applications such as Bitcoin, Ethereum or FIDO U2F (strong authentication).

How to confirm a transaction?

All transactions are confirmed directly on the device's screen. It will show the amount, the destination address and the fee. A confirmation button press is required by the user to proceed to the signature of the transaction.

When and how can I disconnect safely my Nano S?

Your need to have your Nano S connected only when you wish to browse your accounts or sign a transactions. Once a payment has been signed and sent, you can disconnect your Nano S. It is not necessary to have your Nano S online when waiting for a payment or waiting for a transaction's confirmation.

To disconnect the Nano S, just unplug it anytime. There is no ejection procedure.

How to reset the device and wipe the seed?

Enter three wrong PIN codes in a row. The device will then reset and wipe its seed. You'll have to recover your seed through your 24 words backup (or generate a new seed). If you wish to wipe your device on purpose, make sure that you either have the recovery sheet with you, or that you have moved all your crypto assets on another place.

Does Nano S support a passphrase on a seed?

Yes, see the dedicated FAQ entry at https://ledger.groovehq.com/knowledge_base/topics/how-to-setup-a-passphrase-and-an-alternate-pin

Is Nano S based on a Secure Element?

Yes. Nano S is architected around two microprocessors. One secure chip (ST31 family) and one generic MCU (STM32 family). All private key management and critical code execution is done inside the Secure Element.

Why isn't it any anti-tampering sticker on the Nano S box?

Ledger is using cryptographic attestation to make sure that the devices you receive are genuine; A cryptographic procedure checks the integrity of the hardware wallet's internal software each time it is powered on. The Secure Element chip prevents any interception or physical replacement attemps.

Anti-tampering stickers are security theater: any attacker capable of reproducing a device can print new shiny stickers. Ledger's products are engineered to be natively tamper-proof and cannot be counterfeited.

Can I have my Nano S on a keychain?

Yes. Nano S has a foldable swivel cover which protects the device when attached to a keychain. You'll find everything you need in the box to securely attach your device.

What is "browser support" in the settings of crypto apps?

Browser support must be enabled if you wish to use a direct browser integration such as MyEtherWallet.com

To use your Nano S with the Chrome app, Electrum or Mycelium, browser support must be disabled.

Can Nano S manage Bitcoin and Ethereum?

Yes. Just select which app (Bitcoin/Ethereum) you whish to activate on the device, and launch the corresponding Chrome Wallet application on your computer.

Does Nano S support both Ethereum chains (ETH/ETC)?

Yes. Nano S supports all chains, and the Ledger Wallet Ethereum Chrome application will have a switch to select on which chain you want to operate. However, be careful of replay attack and make sure to split your accounts.

ETH account derivation path is 44’/60’/0'/0

ETC account derivation path is 44’/60’/160720'/0'/0

Can Nano S manage any other crypto-currency?

From a technical point of view, it's possible. However it would require to load a specific coin app on device, and therefore that this app would be developed by a third party. Ledger provides will a SDK so anyone can build an app and flash it on Nano S.

Is it possible to have multipled crypto-currencies holdings in the same time on the same Nano S?

Yes. You can have balances in BTC/ETH/DOGE/LTC/etc in the same time with your Nano S. Generally speaking, you can have as much balances than it exist coins, there is no limit on what it can supports.

All crypto private keys are derived from your master seed (24 words recovery sheet) so adding new coins or using multiple coins doesn't require to change or update your backup. Recovering your seed on another Nano S (or Blue) will recover all your crypto-currencies in the same time.

What is the FIDO U2F app?

Nano S is FIDO U2F certified. This means that you can use this device as a strong authenticator (second factor) for compatible services such as Google, Dropbox or Github. Just select the U2F app on device and pair it with your service.

Is there a battery in Nano S?

No. To be powered, Nano S must be plugged to a USB port through a cable (included in the box, but any compatible one can be used).

Are the onboarded apps Open Source? What about the firmware?

All apps are Open Source. Everything is available on our Github.

Regarding the firmware, the source code will be available for all the non secure (STM32) part and some of the secure (ST31) part. Ultimately it'll be available for most of the ST31 with a minimal binary blob implementing the chip functionalities only available under NDA. It'll also not be possible to reverse engineer this binary blob, but it'll be possible to check that it's not performing any other functions than those which are documented.

We have elaborated on our vision for Open Source development on Secure Elements on a blog post.

Is Nano S waterproof?

It has not been designed for being waterproof certified but it can for sure resist rain and accidental immersion. We have a video demonstrating full immersion success, but this is not a feature that we can generally guarantee.

What is the latest firmware version?

The latest firmware version is 1.3.1 and you can read a short guide of its features. To update your firmware and apps, follow this step by step guide.

How can I update the firmware if the device is not initialized yet?

Keep the the right button pressed when you power on the device, and you'll activate recovery mode. You can then launch the Ledger Manager and start the update procedure. Note that if you have a seed set, the update will wipe the seed. 

Why has my Ethereum wallet suddenly stopped working, while Bitcoin and other alts still do?

It is probable that you have enabled "Browser Support" in your Nano S' Ethereum settings, either inadvertently or in order to use compatible Web applications, like MyEtherWallet.com

Putting the device in "Browser Support" changes it's behavior as a USB device. You need to disable Browser Support whithin the Nano S internal Ethereum application's settings in order to switch the device back to regular USB mode, therefore allowing the PC application to communicate with it.

Can I use my Nano S with an Android device?

Yes. You need to make sure that your Android smartphone or tablet supports USB OTG, and get an OTG adapter.
You will also need a compatible client application running on your Android device, like Mycelium

Can I use my Nano S with an iOS device (iPhone/iPad)?

Unfortunately no. We don't have access to Apple's mobile devices' USB port and therefore cannot offer an iOS Nano S client application. The Ledger Blue will connect to iOS through its Bluetooth radio in a future update.