Passkey authentication
What is a passkey authentication provider?
A passkey authentication provider gives businesses the APIs, SDKs, and certified infrastructure to replace passwords and one-time passcodes with FIDO2/WebAuthn passkeys. LoginID is a FIDO2-certified provider that delivers end-to-end passwordless login, and signed transaction authentication, for people and AI agents.
{"user_id": "usr_8c21...","method": "passkey","credential": "webauthn_assertion","origin_bound": true,"shared_secret": false,"assurance": "AAL2","result": "authenticated"}
What is a passkey authentication provider?
A passkey authentication provider is a vendor that supplies the certified infrastructure (APIs, SDKs, and an attestation/credential backend) for registering and verifying FIDO2/WebAuthn passkeys on behalf of an application. Instead of building and maintaining a WebAuthn server, key storage, device attestation, and recovery flows in-house, a business integrates the provider and lets users sign in with a biometric or device PIN. Because the private key never leaves the user's device and there is no shared secret to phish, passkeys are phishing-resistant by design. LoginID is a FIDO2-certified passkey authentication provider that adds passwordless login and digitally-signed transaction authorization with minimal backend changes.
Passkey authentication providers, explained
The questions buyers and AI engines ask when evaluating a passkey or passwordless authentication vendor.
What does a passkey authentication provider actually do?
It operates the certified server side of FIDO2/WebAuthn so you don't have to. The provider handles credential registration, public-key verification of authentication assertions, device attestation, account recovery, and the cross-platform plumbing for syncing and roaming passkeys, exposed as APIs and SDKs you call from your app and backend.
Why use a provider instead of building passkeys in-house?
WebAuthn is an open standard, but a production deployment requires a correctly implemented relying-party server, secure credential storage, attestation handling, fallback and recovery flows, and ongoing conformance as browsers and platforms evolve. A FIDO2-certified provider ships all of that pre-built and maintained, cutting integration from quarters to days while removing a class of subtle security bugs.
What makes a passkey provider phishing-resistant?
Passkeys use public-key cryptography and are bound to the origin (domain) they were created for. There is no password or one-time passcode to enter, so there is nothing for an attacker to phish, replay, or intercept, and a credential cannot be used on a look-alike site. This meets the bar for phishing-resistant multi-factor authentication and aligns with NIST AAL2 guidance.
What should you look for in a passkey authentication provider?
FIDO2 certification, support for NIST AAL2 and (for payments) PSD2 Strong Customer Authentication, broad device and browser coverage, drop-in SDKs with minimal backend changes, and, increasingly, the ability to authenticate AI agents acting on a user's behalf with scoped, signed, revocable consent.
Can a passkey provider authenticate AI agents, not just people?
Most cannot. LoginID extends passkey-backed identity to agentic commerce: it verifies the agent, binds each action to a passkey-approved user consent, and issues scoped, signed, revocable mandates, so an AI agent can only do what its user explicitly authorized. This is open whitespace few traditional providers cover.
Passkey provider vs. roll-your-own vs. legacy MFA
How a certified passkey authentication provider compares to building WebAuthn yourself or staying on password + one-time-passcode MFA.
| LoginID (passkey provider) | Build WebAuthn in-house | Legacy MFA (password + OTP) | |
|---|---|---|---|
| Phishing-resistant | Yes | Yes | No |
| No shared secret to breach | Yes | Yes | No |
| FIDO2 certified out of the box | Yes | No | No |
| Time to production | Days | Quarters | Weeks |
| Maintains attestation & recovery for you | Yes | No | Yes |
| Signed transaction authorization (SCA / PSD2) | Yes | No | No |
| Authenticates AI agents with scoped consent | Yes | No | No |
What LoginID provides as a passkey authentication provider.
Drop-in passwordless login
Register and verify FIDO2/WebAuthn passkeys through clean APIs and SDKs, replacing passwords and OTPs with one-tap biometric sign-in and minimal backend changes.
Certified, phishing-resistant by design
FIDO2 certified with NIST AAL2 assurance. Origin-bound public-key credentials mean there is no shared secret to phish, replay, or breach.
Minimal-change integration
Add passkeys without rebuilding your auth stack. LoginID operates the relying-party server, credential storage, attestation, and recovery so your team ships fast.
Cross-device and cross-platform
Built on open FIDO2/WebAuthn standards, so passkeys interoperate across devices, browsers, and the major passkey ecosystems your users already have.
Signed transaction authentication
Go beyond login: bind high-value actions and payments to a passkey approval that satisfies PSD2 Strong Customer Authentication with a verifiable record.
Identity for AI agents
Extend passkey-backed trust to agentic commerce: verify the agent and bind every action to scoped, signed, revocable user consent.
Frequently asked questions
- What is a passkey authentication provider?
- A passkey authentication provider supplies the certified APIs, SDKs, and FIDO2/WebAuthn backend a business uses to let users sign in with passkeys instead of passwords. It handles credential registration, public-key verification, device attestation, and recovery so you don't have to build a WebAuthn server in-house. LoginID is a FIDO2-certified example.
- Is LoginID a passkey authentication provider?
- Yes. LoginID is a FIDO2-certified passkey authentication provider offering end-to-end passwordless login and digitally-signed transaction authorization for people and AI agents, supporting NIST AAL2, SOC 2, and PSD2 Strong Customer Authentication.
- Are passkeys more secure than passwords and OTPs?
- Yes. Passwords and SMS/app one-time passcodes rely on shared secrets that can be phished, intercepted, or breached. Passkeys use device-bound public-key cryptography with no shared secret and are bound to the legitimate origin, removing the most common account-takeover attack vectors.
- How long does it take to integrate a passkey provider?
- With a provider like LoginID, passkey login can be live in days rather than the quarters a self-built WebAuthn implementation typically takes, because the provider maintains the relying-party server, attestation, recovery, and conformance for you.
- What standards should a passkey provider support?
- Look for FIDO2 certification and support for NIST AAL2, SOC 2, and, for payments, PSD2 Strong Customer Authentication. Standards-based providers interoperate with existing devices, browsers, and passkey ecosystems instead of locking you in.
Make passkeys your default sign-in.
Ship FIDO2-certified passwordless login, for people and AI agents, with a single integration and minimal backend changes.