Passwords have been failing us for decades, and everyone involved knows it. People reuse them because remembering a unique one for every account is impossible, attackers steal them in bulk because they are stored as reusable secrets, and phishing works because a password can simply be typed into the wrong website. Passkeys, the technology now rolling out across major platforms, are the industry’s most serious attempt to retire the password altogether, and security teams are pushing them hard.
This explainer, part of the technology and security reporting at Techwrote, covers how passkeys work under the surface, why they resist the attacks that defeat passwords, and what users should expect as the transition gathers pace.
How a passkey actually works
A passkey is a pair of cryptographic keys. One key is private and never leaves your device; the other is public and is stored by the website or service. When you sign in, the service sends your device a challenge, your device proves it holds the private key by signing that challenge, and you confirm the action with the unlock you already use, a fingerprint, face scan or device PIN. No shared secret crosses the internet, and there is nothing for you to remember or type.
The standards behind this come from the FIDO Alliance, whose passkey specifications build on the WebAuthn standard supported by browsers and operating systems. In practice, passkeys created on a phone or computer are usually synced through your platform account, so a new device can recover them, while the private keys themselves are protected by the device’s own security hardware.
Why security teams prefer them
The advantages map neatly onto the ways passwords fail. Because a passkey is bound to the real website’s identity, it cannot be phished: a lookalike site simply will not receive a valid response, since the credential will not even be offered there. Because the service stores only a public key, a breach of its database yields nothing an attacker can replay. Because there is nothing to remember, there is nothing to reuse across sites, which removes credential stuffing, one of the commonest account-takeover techniques, from the equation.
Government guidance has moved in the same direction. The UK’s National Cyber Security Centre has long advised against forcing complexity and frequent changes on users, and now points towards passwordless methods as the stronger option where they are available. For organisations, passkeys also cut support costs, since forgotten passwords remain one of the most common reasons employees contact a help desk. Our cybersecurity section covers the deployment side of that story, including how administrators roll passkeys out to a whole workforce.
Passwords will linger, but their role is shrinking
It is worth being realistic about the timeline. Passwords will not vanish this year or next: older systems, shared accounts and edge cases will keep them alive for a long while yet, and most people will manage a mixture of both methods through the transition. What changes first is the default. New accounts at major services increasingly steer users towards passkeys from the start, and each converted account is one less reusable secret in circulation for attackers to steal, trade and replay.
What the transition means for users
For now, expect a hybrid period. Many services offer passkeys alongside passwords and two-factor codes, and you may be prompted to create a passkey after signing in the old way. That prompt is worth accepting: setup takes seconds, and afterwards sign-in is usually faster than typing a password and waiting for a text message. Keep your device unlock strong, since the fingerprint or PIN that releases your passkeys becomes the real guardian of your accounts.
There are honest caveats. Losing access to every device and to the platform account that syncs your passkeys can make recovery slower, so keeping a recovery method up to date matters. Shared family accounts and older devices can also complicate the picture. None of this outweighs the central fact: the password asks fallible humans to protect reusable secrets, and passkeys remove that job from us entirely. After thirty years of password advice, that is a genuinely better bargain.
