WebAuthn Explained

© Okta and/or its afﬁliates. All rights reserved. Conﬁdential Information
of Okta – For Recipient’s Internal Use Only. WebAuthn Explained Pradheepa Pullanieswaran Staff Developer Advocate, Okta Twitter : @pradheepa www.pradheepap.com

of Okta – For Recipient’s Internal Use Only. Agenda 01 Why WebAuthn 02 What is WebAuthn 03 How to WebAuthn 04 Demo 05 Q&A

of Okta – For Recipient’s Internal Use Only. Why WebAuthn

of Okta – For Recipient’s Internal Use Only. - Username and Password - Digital Identity of the user Authentication

of Okta – For Recipient’s Internal Use Only. Passwords… Are they secure?

of Okta – For Recipient’s Internal Use Only.

of Okta – For Recipient’s Internal Use Only. 80% Passwords are the root cause of over 80% of data breaches. 90 Users have more than 90 online accounts. 51% Up to 51% of passwords are reused.

of Okta – For Recipient’s Internal Use Only. Password, qwerty are the most common passwords. Easily guessed and vulnerable to brute force attacks Password rules with • Special Characters • Symbols • Minimum length • Upper Case • Lower Case etc Easy to guess Problem Solution

of Okta – For Recipient’s Internal Use Only. A1Password!, vh64Zw#yrJRcM^ Credential Stufﬁng Up to 51% of passwords are reused. Use MFA Complex passwords Problem Solution

of Okta – For Recipient’s Internal Use Only. Any MFAs better than no MFA. But is this enough?

of Okta – For Recipient’s Internal Use Only. SMS Coverage Issues Delay Cost Sim Swap User Experience Usability Adaptability Phishable Vulnerability Authenticator Phone Security App Security Multi-Factor Authentication

of Okta – For Recipient’s Internal Use Only. What about passwordless?

of Okta – For Recipient’s Internal Use Only. What is WebAuthn

of Okta – For Recipient’s Internal Use Only. WebAuthentication (WebAuthn) - Global authentication standard based on public key cryptography. - A better alternative for securing our sensitive information online. - Allows servers to register and authenticate users using public key cryptography instead of a password. - Browser based API implementation of FIDO2 standard

of Okta – For Recipient’s Internal Use Only. Public Key Cryptography K Private K Public Digitally Signed with Private Key Veriﬁed the message using the public key

of Okta – For Recipient’s Internal Use Only. Signed Message Signature

of Okta – For Recipient’s Internal Use Only. Signer Signs Message Signature Signer Veriﬁer

of Okta – For Recipient’s Internal Use Only. Signer Signs Message Signature Signer Veriﬁer Hashing Function #######

of Okta – For Recipient’s Internal Use Only. Signer Signs Message Signature Signer Veriﬁer K Private Hashing Function ####### Encrypt

of Okta – For Recipient’s Internal Use Only. Verifier Verifies Message Signature Signer Verifier K Private Hashing Function ####### Encrypt Hashing Function #######

of Okta – For Recipient’s Internal Use Only. Verifier Verifies Message Signature Signer Verifier K Private Hashing Function ####### Encrypt Hashing Function ####### Decrypt K Public #######

of Okta – For Recipient’s Internal Use Only. Verifier Verifies Message Signature Signer Verifier Hashing Function ####### Encrypt Hashing Function ####### Decrypt K Public ####### Equals?

of Okta – For Recipient’s Internal Use Only. Verifier Verifies Message Signature Signer Verifier 1. Message is not tampered 2. The Signer has the private key

of Okta – For Recipient’s Internal Use Only. WebAuthn Registration

of Okta – For Recipient’s Internal Use Only. Hey, I am Meenu. I want to create a new account. User www.webauthn.me (Relying Party)

of Okta – For Recipient’s Internal Use Only. Sure, Give me your public key. User www.webauthn.me (Relying Party)

of Okta – For Recipient’s Internal Use Only. User hmm.. Creating the keypairs www.webauthn.me (Relying Party)

of Okta – For Recipient’s Internal Use Only. User Here it is! www.webauthn.me (Relying Party)

of Okta – For Recipient’s Internal Use Only. Thanks, Registration is complete User www.webauthn.me (Relying Party)

of Okta – For Recipient’s Internal Use Only. WebAuthn Authentication

of Okta – For Recipient’s Internal Use Only. Hey, I am Meenu. I want to sign in to my account. User www.webauthn.me (Relying Party)

of Okta – For Recipient’s Internal Use Only. User Please sign this challenge to identify you 6vRQpCdg 6vRQpCdg www.webauthn.me (Relying Party)

of Okta – For Recipient’s Internal Use Only. User www.webauthn.me (Relying Party) Signing now with the private key… Here is my signed message 6vRQpCdg 6vRQpCdg

of Okta – For Recipient’s Internal Use Only. User Application Server (Relying Party) Verifying the signature with the public key Great !!! You are in. 6vRQpCdg 6vRQpCdg

of Okta – For Recipient’s Internal Use Only. Who creates public & private key?

of Okta – For Recipient’s Internal Use Only. Roaming Authenticators - Bluetooth - NFC - USB pc: https://hwsecurity.dev/img/security-keys-ﬁdo-passwordless.png

of Okta – For Recipient’s Internal Use Only. Platform Authenticators Secured Enclave accessed via - Windows Hello - Finger Print - Face ID

of Okta – For Recipient’s Internal Use Only. Protocols

of Okta – For Recipient’s Internal Use Only. - CTAP1/U2F Protocol and CTAP2 - Describes how an application (i.e. browser) and operating system establish communications with a compliant authentication device. - FIDO CTAP1 enables an external and portable authenticator (such as a hardware security key) to interoperate with a client platform CTAP - Client-to-Authenticator Protocol

of Okta – For Recipient’s Internal Use Only. - CTAP2 is backward compatible and describes speciﬁcation both Platform and Roaming authenticators - Handled by the device. Developers don’t have to worry about the implementation part. CTAP - Client-to-Authenticator Protocol

of Okta – For Recipient’s Internal Use Only. - Speciﬁes the communication between the browser and the application (Relying Party) - Implementation of webauthn api is handled by the application developer. WebAuthn

of Okta – For Recipient’s Internal Use Only. https://developers.yubico.com/WebAuthn/WebAuthn_Developer_Guide/

of Okta – For Recipient’s Internal Use Only. Registration Ceremony

of Okta – For Recipient’s Internal Use Only. pc: https://mvallim.github.io/kubernetes-under-the-hood/

of Okta – For Recipient’s Internal Use Only. Players Authenticator WebAuthn API Relying Party www.webauthn.me User

of Okta – For Recipient’s Internal Use Only. Create an account Registration Username : Meenu

of Okta – For Recipient’s Internal Use Only. Create credential Username : Meenu rpId : www.webauthn.me challenge : we345yiom

of Okta – For Recipient’s Internal Use Only. 1. Validate if origin matches RP ID 2. Create key pairs using navigator.credentials.create Username : Meenu rpId : www.webauthn.me clientData : challenge + rpId

of Okta – For Recipient’s Internal Use Only. Please provide the consent to prove user presence

of Okta – For Recipient’s Internal Use Only. Touches the authenticator to provide consent

of Okta – For Recipient’s Internal Use Only. Creating keypair Creating CredentialId Creating attestation object to prove the integrity of the authenticator Public Key Credential Id Attestation Signed Challenge

of Okta – For Recipient’s Internal Use Only. Verify Origin Verify Challenge Verify Attestation Signature Store userid, Credential Id, Public Key Public Key Credential Id Attestation Signed Challenge

of Okta – For Recipient’s Internal Use Only. UserId Credential Id Public Key Attestation OK Registration Complete

of Okta – For Recipient’s Internal Use Only. Authentication Ceremony

of Okta – For Recipient’s Internal Use Only. Players authenticator WebAuthn API Relying Party www.webauthn.me User

of Okta – For Recipient’s Internal Use Only. Sign in Username : Meenu Authentication

of Okta – For Recipient’s Internal Use Only. rpId : www.webauthn.me credential Id: [ xyersdfs ] Challenge: ewertjk347sd Server Challenge - Get Credentials

of Okta – For Recipient’s Internal Use Only. rpId : www.webauthn.me credential Id: xyersdfs client data: challenge+ origin Authenticator

of Okta – For Recipient’s Internal Use Only. Please provide the consent User Presence / Veriﬁcation

of Okta – For Recipient’s Internal Use Only. 1. Retrieves Private Key 2. Builds and sign the response using the private key Creating Signed assertion Authenticator data client data hash: challenge+ origin Signature

of Okta – For Recipient’s Internal Use Only. Challenge Response Authenticator data client data hash: challenge+ origin Signature

of Okta – For Recipient’s Internal Use Only. ➔ Validates Signature with public key ➔ Validates Challenge ➔ Validates the assertion OK Sign in Complete

of Okta – For Recipient’s Internal Use Only. https://www.webauthn.me https://webauthn.guide https://www.okta.com/blog/2019/05/the-ultimate-guide-to-webauthn- registration-and-auth-ﬂows/ https://developers.yubico.com/WebAuthn FIDO2 – Creating a passwordless future By John Craddock References

of Okta – For Recipient’s Internal Use Only. Yubikeys available at the booth.

of Okta – For Recipient’s Internal Use Only.

of Okta – For Recipient’s Internal Use Only. Questions?

of Okta – For Recipient’s Internal Use Only. Thank You

WebAuthn Explained

WebAuthn Explained

Transcript

More Decks by Pradheepa P

Other Decks in Programming

Featured