Passwords have been the standard way to sign in to online accounts for decades. Unfortunately, passwords have also become one of the weakest links in cybersecurity.

Every year, millions of passwords are stolen through phishing attacks, malware infections, data breaches, and password reuse.

Passkeys are designed to change that.

Passkeys provide a simpler, faster, and more secure way to sign in without relying on traditional passwords. Microsoft describes passkeys as phishing-resistant credentials that use public-key cryptography and can serve as a strong authentication method when combined with a PIN or biometrics.

What Is a Passkey?

A passkey is a digital credential stored on a device such as:

• A smartphone
• A laptop
• A tablet
• A hardware security key

Instead of typing a password, you simply verify your identity using:

• Fingerprint recognition
• Facial recognition
• Device PIN
• Biometric authentication

Your device then securely proves your identity to the website or application.

How Passkeys Work

Passkeys use something called public-key cryptography.

When you create a passkey:

1. Your device creates two keys.
2. A private key stays securely on your device.
3. A public key is stored by the website or application.
4. During sign-in, your device proves ownership of the private key without ever sending it across the internet.

Because the private key never leaves your device, attackers cannot steal it in the same way they steal passwords.

Why Are Passkeys More Secure Than Passwords?

Traditional passwords have several weaknesses:

• They can be guessed
• They can be reused
• They can be leaked in breaches
• They can be stolen through phishing emails
• They can be captured by malicious websites

Passkeys were specifically designed to address these problems.

Microsoft notes that passkeys help prevent remote phishing attacks by replacing phishable methods such as passwords, SMS codes, and email verification codes. They are also tied to the specific website where they were created, which helps prevent credential theft through fake login pages.

Why Passkeys Are Phishing Resistant

One of the biggest advantages of passkeys is that they are tied to a specific website or application.

For example:

If an attacker creates a fake website that looks identical to Microsoft’s login page, your passkey will not work there.

Your device recognizes the difference.

Microsoft explains that passkeys are associated with a specific domain and cannot be presented to a malicious website pretending to be the real service.

Are Passkeys Considered Multi-Factor Authentication?

Yes.

Microsoft considers passkeys a form of multi-factor authentication because they require:

Something You Have

Your device that stores the passkey.

Something You Are or Know

• Fingerprint
• Face recognition
• Device PIN

Together these factors provide stronger protection than passwords alone.

Where Can Passkeys Be Used?

Passkey support is growing rapidly.

Many major platforms now support passkeys, including:

• Microsoft accounts
• Microsoft Entra ID
• Microsoft 365
• Google accounts
• Apple accounts
• Banking applications
• Business SaaS platforms

Microsoft supports passkeys for Microsoft Entra ID and Windows sign-in scenarios through FIDO2-based authentication.

Can Passkeys Work Across Multiple Devices?

Yes.

Most modern passkey systems support synchronization between trusted devices.

Examples include:

• Lastpass Password Manager
• Apple iCloud Keychain
• Google Password Manager
• Microsoft Password Manager
• Yubikeys

Microsoft also supports cross-device authentication, allowing a passkey stored on one device to authenticate another nearby device using QR code-based workflows.

Why Businesses Should Care About Passkeys

Business email compromise, phishing attacks, and account takeovers continue to be major cybersecurity threats.

Many of these attacks succeed because:

• Employees reuse passwords
• Weak passwords are used
• Passwords are stolen through phishing

Passkeys dramatically reduce those risks.

Benefits include:

• Better protection against phishing
• Improved Microsoft 365 security
• Reduced password reset requests
• Faster sign-in experience
• Stronger user authentication
• Lower risk of account compromise

Microsoft’s Shift Toward Passwordless Authentication

Microsoft is increasingly encouraging organizations to move toward phishing-resistant authentication methods.

Microsoft has announced that passkeys are becoming the default authentication experience in Microsoft Entra ID as part of a broader move away from older, more vulnerable authentication methods such as SMS and voice-based verification.

This reflects a growing industry trend toward passwordless authentication.

Are Passkeys Perfect?

No security technology is perfect.

Like any technology, passkeys must still be implemented properly and protected by secure devices.

Recently published security research demonstrated attack scenarios involving compromised devices and authentication materials, while noting that these attacks did not break the cryptography underlying passkeys themselves. [thehackernews.com]

For most organizations, however, passkeys provide significantly stronger protection than passwords alone.

The Bottom Line

Passkeys represent one of the biggest improvements in authentication security in years.

Instead of relying on passwords that can be stolen, guessed, or reused, passkeys use cryptographic credentials that are tied to your device and the website you are accessing.

The result is:

✅ Stronger security
✅ Better protection from phishing
✅ Faster sign-ins
✅ Fewer passwords to manage
✅ Improved Microsoft 365 account protection

For businesses looking to strengthen cybersecurity and reduce account compromise risks, passkeys are quickly becoming the new standard.

Need Help Implementing Passkeys?

ComputersDOTCalm helps businesses throughout Southwestern Ontario:

• Deploy Microsoft 365 securely
• Enable passkeys and passwordless authentication
• Configure Microsoft Entra ID security
• Implement Multi-Factor Authentication
• Reduce phishing and account takeover risk
• Improve overall cybersecurity posture

Contact us to learn how passwordless authentication can improve your organization’s security.

admin

See Full Bio