Passkeys vs Passwords: Can Hackers Still Steal Your Accounts?

Imagine logging into your Google account without typing a password.

No password to remember.

No password to accidentally enter on a fake website.

No password for hackers to steal from a phishing page.

Instead, you open the login screen, confirm your identity using your fingerprint or device PIN, and you’re signed in.

Sounds futuristic?

It’s already possible.

The technology is called passkeys, and it is changing how people authenticate themselves online.

For years, we’ve been told to use long passwords, avoid password reuse, enable two-factor authentication, and never click suspicious login links.

Those practices still matter. But passkeys introduce a different approach: instead of proving your identity by typing a secret, your device uses cryptographic keys to authenticate you.

So here’s the interesting question:

If you switch to passkeys, can hackers still steal your accounts?

Let’s understand how passkeys work, why they’re different from passwords, what attacks they prevent, and where their limitations are.

1. What Exactly Is a Passkey?

A passkey is a password replacement that allows you to sign in using a device you own.

Depending on your device and configuration, you may authenticate using:

• Fingerprint.
• Face recognition.
• Device PIN.
• Device password.
• A compatible hardware security key.

For example, when you sign in to a website that supports passkeys, your browser may display a prompt asking you to verify your identity.

You authenticate locally, and your device completes the cryptographic authentication process.

You don’t have to type a password into the website.

The important part is that your fingerprint or face scan isn’t simply sent to the website as your login credential. Biometric verification normally happens locally on your device.

A passkey is not your fingerprint. It’s a cryptographic credential protected by your device’s authentication mechanism.

2. How Do Passkeys Actually Work?

This is where things get interesting.

Traditional passwords rely on a shared secret.

You create a password, and the website stores a password verifier. When you log in, the website checks whether the password you entered matches.

Passkeys use public-key cryptography instead.

When you register a passkey with a website, your device creates a cryptographic key pair:

• Private key: Used by your device to prove your identity.
• Public key: Registered with the website.

The private key remains protected by your device or passkey provider. The website stores the public key.

When you try to sign in, the website sends a cryptographic challenge.

Your device uses the private key to sign that challenge after you authorize the operation.

The website verifies the signature using the public key.

If the verification succeeds, authentication is granted.

Here’s a simplified representation:

          YOU CREATE A PASSKEY
                  |
                  v
          Device generates
          a key pair
                  |
          +-------+-------+
          |               |
          v               v
      Private Key      Public Key
          |               |
          v               v
     Protected by       Stored by
     your device        the website
          |               |
          +-------+-------+
                  |
                  v
             LOGIN REQUEST
                  |
                  v
          Website sends a
          cryptographic challenge
                  |
                  v
          Device signs challenge
          using private key
                  |
                  v
          Website verifies
          using public key
                  |
                  v
             ACCESS GRANTED

The major security advantage is that the website doesn’t need to store your private authentication secret.

Even if a website’s password database is stolen, attackers cannot simply retrieve your passkey’s private key from the public key stored by that website.

3. Why Are Passkeys Harder to Phish?

Let’s compare two situations.

Scenario A: Traditional password phishing

You receive an email:

“Your Google account will be suspended. Verify your identity immediately.”

You click the link.

A fake Google login page opens.

It looks convincing.

You enter your email and password.

The attacker captures your credentials.

If you also enter an OTP, the attacker may attempt to use it before it expires.

Scenario B: Passkey authentication

You receive the same email.

You open the fake website.

It asks you to sign in using a passkey.

But your passkey is associated with the legitimate website’s identity.

Your browser and operating system check the website origin during authentication.

A passkey registered for the real website generally cannot be used to authenticate to an unrelated phishing domain.

This is called origin binding.

It is one of the biggest advantages of passkeys.

A fake website can copy a company’s logo, colors, and login page, but it cannot simply ask your device to use a passkey registered for a different domain.

This makes passkeys strongly resistant to traditional credential-harvesting phishing.

4. Passkeys vs Passwords: What’s the Difference?

Feature	Traditional passwords	Passkeys
User remembers a secret	Yes	No
Can be typed into a fake website	Yes	Not in normal passkey authentication
Resistant to phishing	No, not inherently	Yes, by design
Reuse across websites	Common risk	Each credential is tied to its service
Website stores a password verifier	Yes	Stores a public key
Credential stuffing risk	High when passwords are reused	Greatly reduced
Sign-in method	Type password	Device verification
Recovery	Password reset	Depends on device, provider and service recovery

Passkeys are generally a stronger authentication option, but they don’t eliminate every way an account can be compromised.

5. Can Hackers Still Hack You If You Use Passkeys?

Yes.

Passkeys protect against several important attacks, but they don’t make your entire digital life invulnerable.

An attacker may target other parts of your account security.

Here are some examples.

Attack 1: Stealing Your Unlocked Device

Imagine someone steals your phone while it’s unlocked.

They may have access to applications, active sessions, stored information, and potentially your passkeys, depending on the device’s security and authentication requirements.

A passkey normally requires user verification, but a stolen unlocked device can create additional opportunities for abuse.

Protection:

• Use a strong device PIN or password.
• Enable automatic screen locking.
• Avoid simple or predictable unlock codes.
• Enable remote device locking and tracking.
• Protect sensitive applications with additional authentication where available.

Attack 2: Compromising Your Passkey Provider Account

Many people use synced passkeys.

For example, passkeys may be managed through:

• Google Password Manager.
• Apple iCloud Keychain.
• Microsoft or Windows-supported credential managers.
• Compatible third-party password managers.

Synced passkeys can make it easier to use the same credentials across multiple devices.

However, this means the security of your passkey ecosystem also depends on protecting the account and recovery methods associated with your provider.

If an attacker compromises your provider account and successfully satisfies its recovery and security checks, your synced credentials may become a target.

Protection:

• Secure your Google or Apple account with strong authentication.
• Review trusted devices.
• Protect recovery methods.
• Enable available account security alerts.
• Don’t approve unexpected sign-in requests.

Attack 3: Social Engineering

Passkeys don’t stop someone from manipulating you.

An attacker might pretend to be:

• Your bank.
• A technical support employee.
• A company administrator.
• A delivery agent.
• A trusted colleague.

They may convince you to approve an account change, reveal a device PIN, hand over your unlocked phone, or change account recovery information.

The passkey itself may remain secure, but the surrounding account can still be exposed.

Protection: Never share your device PIN or approve unexpected security changes just because someone claims to be from technical support.

Attack 4: Account Recovery Abuse

This is an important limitation.

Imagine you have a very secure passkey protecting your email account.

But your recovery process still allows someone to regain access through a weak recovery method.

An attacker may focus on that recovery route rather than trying to break the passkey.

This is why account recovery matters just as much as everyday authentication.

Review your recovery email, phone number, backup codes, and trusted devices.

Attack 5: Malware and Session Theft

Passkeys protect the authentication process. They don’t automatically protect everything that happens after you log in.

For example, malware on a compromised device may attempt to steal browser session cookies or access information available to the current user.

If an attacker obtains a usable authenticated session, they may not need to steal your password or passkey.

Protection:

• Keep your operating system and browser updated.
• Avoid installing unknown applications.
• Review browser extensions.
• Use reputable endpoint protection.
• Sign out of unfamiliar sessions.

6. What Happens If You Lose Your Phone?

This is probably one of the first questions people ask about passkeys.

Imagine you create passkeys for:

• Google.
• Microsoft.
• Amazon.
• GitHub.
• Other important accounts.

Then your phone gets lost or damaged.

Can you still log in?

The answer depends on how your passkeys are stored.

Synced passkeys

Some passkeys are synchronized through a supported provider.

For example, if you use Google Password Manager or Apple iCloud Keychain, your passkeys may become available on other devices after you securely sign in to the same provider account.

This makes device replacement easier.

Device-bound passkeys

Some passkeys are tied to a particular device or hardware security key.

If that device is lost, you may need another registered authentication method or the service’s account recovery process.

The smart approach

Don’t rely on a single device for your most important accounts.

Where supported:

1. Register a passkey on your primary device.
2. Set up another trusted device or compatible security key.
3. Keep recovery methods current.
4. Store backup codes securely if the service provides them.
5. Understand how to recover your passkey provider account.

A secure login method is useful only if you can recover access when your device is lost.

7. Are Passkeys Safer Than Two-Factor Authentication?

This requires a little explanation.

Traditional two-factor authentication often combines:

• Something you know: password.
• Something you have: phone or security key.

For example, you enter a password and then receive an OTP.

But OTPs can be phished.

An attacker can create a fake login page and ask you for both your password and OTP.

If you enter both, they may attempt to use them immediately.

Passkeys are designed to provide phishing-resistant authentication.

They combine possession of the credential with local user verification, such as a PIN or biometric, when the service requests it.

In many implementations, a passkey can provide strong authentication without a separate OTP.

However, whether a passkey satisfies a particular organization’s MFA or regulatory requirement depends on its implementation and policy.

The important point is:

A properly implemented passkey is generally more resistant to phishing than a password followed by an ordinary SMS OTP.

8. How to Create a Passkey for Your Google Account

Google supports passkeys on compatible devices and browsers.

Here’s how to create one.

1. Open Google’s official passkey page: https://g.co/passkeys
2. Sign in to your Google Account.
3. Select the option to create a passkey.
4. Follow the on-screen instructions.
5. Verify your identity using your device’s screen lock or supported authentication method.

After setup, Google may offer the passkey as a sign-in option on supported devices.

You can also review your account’s security settings and registered passkeys.

Important: Creating a passkey doesn’t automatically remove your existing password or recovery options. Review your account’s sign-in and recovery settings separately.

9. How to Use Passkeys on Android

Android supports passkeys through compatible applications, browsers, and credential managers.

A typical setup looks like this:

1. Update Android and your browser.
2. Make sure your phone has a secure screen lock.
3. Use a supported passkey provider.
4. Open a website that supports passkeys.
5. Look for an option such as “Create a passkey.”
6. Follow the authentication prompt.

Depending on your device and configuration, your passkeys may be managed through Google Password Manager or another supported provider.

You may then be able to sign in using your fingerprint, face unlock, or device PIN.

10. How to Use Passkeys on iPhone

Apple supports passkeys through its password and credential-management features.

To get started:

1. Update your iPhone to a supported iOS version.
2. Enable a device passcode.
3. Configure iCloud Keychain if you want supported passkeys to sync.
4. Visit a website or application that supports passkeys.
5. Select the option to create a passkey.
6. Follow the Face ID, Touch ID, or passcode prompt.

Passkeys stored through Apple’s supported ecosystem can be available across compatible devices using the same Apple Account.

11. Can You Use Passkeys on Windows 11?

Yes.

Windows supports passkeys through compatible applications, browsers, and credential providers.

Depending on your configuration, you may be able to:

• Store passkeys through Windows-supported credential management.
• Use passkeys saved by compatible third-party providers.
• Authenticate using Windows Hello.
• Use a compatible external security key.
• Sign in using a passkey on another nearby device.

The exact options depend on the website, browser, Windows version, and passkey provider.

For a Windows 11 user, the basic requirement is to keep the system and browser updated and use a supported passkey provider.

12. What About Hardware Security Keys?

Hardware security keys are another important authentication option.

Devices such as FIDO2-compatible security keys can store credentials and authenticate users through supported services.

<PRIVATE_PERSON> Unlike a regular password, the private authentication material is protected by the security key.

Some hardware keys support passkeys directly.

They can be particularly useful for:

• Developers.
• Administrators.
• Business owners.
• People managing important cloud infrastructure.
• Users with high-value accounts.

For sensitive accounts, registering two compatible security keys can provide a backup if one is lost.

Keep the backup key in a secure location.

13. Should You Replace All Your Passwords With Passkeys?

Not immediately.

Passkey support is growing, but not every website, application, or service supports them.

Some accounts still require passwords.

Some services support passkeys only as an additional sign-in method.

Others may offer passkeys but retain password-based recovery.

A sensible transition strategy is:

First priority:

• Primary email account.
• Google or Apple account.
• Password manager.
• Microsoft account.
• Developer accounts.
• Financial services that support passkeys.

Second priority:

• Social media.
• Shopping accounts.
• Cloud storage.
• Gaming accounts.
• Other frequently used services.

For accounts without passkey support, continue using unique, strong passwords and MFA.

Don’t disable your existing recovery methods until you understand the service’s recovery process.

14. The Biggest Mistakes People Make With Passkeys

Even with a strong authentication method, poor security habits can create problems.

Avoid these mistakes:

Mistake 1: Creating passkeys on shared devices

Don’t create a passkey on a public or shared computer that other people can access.

Mistake 2: Ignoring provider account security

Your passkey manager and its recovery methods need strong protection.

Mistake 3: Keeping only one recovery option

A lost device should not mean permanent loss of access.

Mistake 4: Assuming passkeys prevent every attack

They reduce authentication risks, especially phishing, but don’t eliminate malware, account recovery abuse, social engineering, or session theft.

Mistake 5: Approving unexpected authentication requests

If you didn’t initiate the sign-in, don’t approve it.

Mistake 6: Ignoring old devices

Review devices and passkeys registered to your important accounts. Remove entries you no longer recognize or use.

15. Passkeys: What They Protect Against and What They Don’t

Threat	How passkeys help
Fake login pages	Strong protection through origin binding
Password guessing	Removes the need for a traditional password during passkey authentication
Credential stuffing	Greatly reduces risk from reused passwords
Password database leaks	Website’s public key does not reveal the private key
Traditional OTP phishing	Reduces reliance on phishable OTP-based login
Stolen unlocked device	Does not eliminate risk
Malware on your device	Does not automatically prevent malware or session theft
Social engineering	Does not stop someone manipulating you
Weak account recovery	Does not fix insecure recovery processes
Compromised passkey provider	Provider security and recovery remain important

Frequently Asked Questions

Are passkeys completely unhackable?

No authentication system is completely immune to compromise. Passkeys are designed to resist phishing and credential theft, but attackers may target devices, recovery processes, malware, or account sessions.

Can hackers steal my passkey?

A passkey’s private key is protected by the device or passkey provider. It is not normally exposed to websites during authentication. However, device compromise, provider-account compromise, or other security failures can create risks.

Can someone use my fingerprint to log in remotely?

No. Your biometric data is normally processed locally by your device. The website receives the result of the authentication process, not a copy of your fingerprint.

Are passkeys better than passwords?

For supported services, passkeys generally provide stronger protection against phishing and credential stuffing. Passwords are still needed for services that don’t support passkeys.

Do passkeys work without the internet?

The device can perform local authentication, but signing in to an online service normally requires an internet connection to communicate with that service.

Can I use one passkey on multiple devices?

Yes, if you use a provider that supports syncing. Some passkeys are device-bound and do not synchronize.

What happens if I lose my phone?

You may be able to recover synced passkeys through your provider on another trusted device. Device-bound credentials may require a backup key or the service’s recovery process.

Do passkeys replace two-factor authentication?

A properly implemented passkey can provide phishing-resistant authentication and may satisfy multiple authentication-factor requirements. The exact behavior depends on the service and its configuration.

Should I delete my password after creating a passkey?

Not automatically. Some services retain passwords and recovery options even after passkey registration. Understand the available recovery process before changing or removing existing sign-in methods.

Final Thoughts

Passwords have been part of the internet for decades.

We’ve been told to make them longer, more complicated, unique, and difficult to guess.

But passwords have a fundamental problem: people can type them into fake websites, reuse them across services, or accidentally expose them in a data breach.

Passkeys approach authentication differently.

Instead of asking you to remember and type a secret, they use cryptographic credentials protected by your device.

They are not magic, and they won’t stop every cyberattack. But they remove several major weaknesses associated with traditional passwords.

If your important accounts support passkeys, consider setting them up.

Start with your primary email and identity accounts. Secure your passkey provider, review recovery options, and keep a backup authentication method.

The future of account security isn’t just about creating a stronger password. It’s about reducing the number of secrets attackers can steal in the first place.

Think Like a Hacker. Defend Like a Pro.