> For the complete documentation index, see [llms.txt](https://support.backpack.exchange/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.backpack.exchange/exchange/security/passkey.md).

# Passkey

### What is a passkey?

A Passkey is a modern, passwordless sign-in method that uses your device to verify your identity. It replaces passwords with cryptographic keys and device authentication.

### How does a Passkey work?

When you create a Passkey:

* Your device generates a **public key** and a **private key**
* The **public key** is saved by the exchange
* The **private key** stays securely on your device or Passkey manager

When you sign in, your device proves ownership of the private key without revealing it.

### Is using Passkey safe?

Yes. Passkeys use industry-standard cryptography and are designed to be more secure than passwords while being easier to use.

### Frequently Asked Questions About Passkey

<details>

<summary><strong>How do passkeys compare to passwords?</strong></summary>

Passkeys work differently than traditional passwords:

* They are unique to each account and bound to your device.
* They use biometric or PIN verification on your device instead of something you type.
* Because of this, they are less vulnerable to phishing and credential reuse.

</details>

<details>

<summary><strong>Which devices and browsers support passkeys?</strong></summary>

Passkeys are supported on most modern devices and browsers, including iOS, Android, Windows, macOS, and browsers such as Chrome, Safari, and Edge. Support may vary depending on your device and operating system version.

</details>

<details>

<summary><strong>Can I use passkeys across multiple devices? / What if I login from a new device?</strong></summary>

* If your Passkey is synced with a cloud service (such as iCloud or 1Password), you can use it on all your synced devices.
* If cloud sync is not enabled, you can add Passkeys separately on each device. Each device will have its own Passkey for secure login.

</details>

<details>

<summary><strong>Do passkeys replace Two-Factor Authentication (2FA)?</strong></summary>

Passkeys can serve as a strong alternative to passwords and may reduce the need for 2FA in some cases. However, on certain high-security actions (e.g., withdrawals), additional 2FA may still be required.

</details>

<details>

<summary><strong>Where are my passkeys stored?</strong></summary>

Passkeys are stored securely on your device and may be synced via trusted services such as iCloud Keychain (Apple) or Google Password Manager. They are never stored on the exchange’s servers.

</details>

<details>

<summary><strong>What if my device is lost or stolen?</strong></summary>

If your device is lost, you can still log in using your backup login method (password + 2FA) and remove the lost device’s passkey from your account settings. For maximum security, update your account credentials immediately.

</details>

<details>

<summary><strong>Can someone steal my passkey?</strong></summary>

Passkeys cannot be phished or copied like traditional passwords. Even if a someone has your account email, they cannot access your account without your registered device and biometric/PIN verification.

</details>

<details>

<summary><strong>Can I turn off passleys after enabling them?</strong></summary>

Yes. You can disable Passkey at any time in your account security settings and revert to using your password + 2FA login method.

</details>

<details>

<summary><strong>Are passkeys required for withdrawals?</strong></summary>

By default, Passkeys are used for login authentication. For withdrawals and other sensitive actions, additional verification (such as 2FA) may still be required for enhanced security.

</details>


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