https://www.geotrust.com/
GeoTrust | SSL Digital Certificate Authority | Encryption & Authentication
SSL certificates by DigiCert secure unlimited servers with the strongest encryption and highest authentication available.
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https://auth0.com/
Secure AI Agent & User Authentication | Auth0
Secure users, AI agents, and more with Auth0, an easy-to-implement, scalable, and adaptable authentication and authorization platform.
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https://monopoly-authenticity-checker.com/
Monopoly-Authenticity-Checker.com – autograph authentication
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https://www.yubico.com/
Yubico | YubiKey Strong Two Factor Authentication
Oct 28, 2025 - Get the YubiKey, the #1 security key, offering strong two factor authentication from industry leader Yubico.
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https://clerk.com/
Clerk | Authentication and User Management
The easiest way to add authentication and user management to your application. Purpose-built for React, Next.js, Remix, and “The Modern Web”.
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https://en.wikipedia.org/wiki/Basic_access_authentication
Basic access authentication - Wikipedia
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https://www.bouyguestelecom.fr/
407 Proxy Authentication Required
proxyauthenticationrequired
https://support.atecna.fr/
Authentication - GLPI
authenticationglpi
https://www.futurae.com/
Strong Authentication 2FA/MFA App Security | Futurae
Build trust, not inconvenience. The Futurae Platform authenticates your users however you want it.
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https://www.do-my-booking.com/login
Sign in | Authentication required
signauthenticationrequired
https://businesslister.info/auth.php
Authentication||Business Lister
authenticationbusinesslister
https://wp2shell.com/
wp2shell: Pre Authentication RCE in WordPress Core
Check whether your WordPress site is affected by the pre-authentication RCE in WordPress Core. A free checker from Searchlight Cyber.
preauthenticationrcecore
https://bitapps.pro/bit-smtp/
Bit SMTP - Improve Email Deliverability with SMTP Authentication
Jun 6, 2026 - Authenticate and secure your WordPress site's mail service with Bit SMTP. Easily configure SMTP server of your preferred mail service for reliable email...
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https://www.w3.org/TR/webauthn/
Web Authentication: An API for accessing Public Key Credentials - Level 2
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https://www.aixenprovence.fr/
407 Proxy Authentication Required
proxyauthenticationrequired
https://www.yubico.com/products/
YubiKeys | Two-Factor Authentication for Secure Login
May 26, 2026 - The industry's #1 security key, enabling strong two-factor, multi-factor and passwordless authentication.
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https://www.beckett.com/
Trading Card Grading, Authentication and Pricing - Beckett Collectibles
Beckett is the trusted leader in trading card grading, authentication, and online price guides, supporting sports and collectible card collectors.
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https://www.w3.org/TR/webauthn-3/
Web Authentication: An API for accessing Public Key Credentials - Level 3
web authenticationan apipublic key
https://www.authy.com/
Authy: Two-factor Authentication (2FA) App & Guides | Authy
Two-factor authentication (2FA) adds an additional layer of protection beyond passwords. Download our free app today and follow our easy to use guides to...
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https://vsid.com/
Online ID verification and eSignature authentication
Jun 10, 2026 - Sign documents and validate eSignatures online with VSiD. Our identity verification and and eSignature authentication tools ensure secure, compliant, and...
online idverificationesignatureauthentication
https://www.valimail.com/
Leading Email Authentication Solution | Valimail
Protect your business from phishing and spoofing 4x faster with Valimail’s automated DMARC, DKIM, and SPF email authentication solutions.
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https://slcyber.io/research-center/wp2shell-pre-authentication-rce-in-wordpress-core/
wp2shell: Pre Authentication RCE in WordPress Core › Searchlight Cyber
Jul 17, 2026 - Critical issue discovered in WordPress Core affecting the majority of WordPress-built sites. The zero-day is a pre-authentication Remote Code Execution (RCE)...
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https://mfasoft.ru/
Secure Authentication Server MFASOFT — российское ПО для двухфакторной аутентификации
✔️ Аутентификация по одноразовым паролям ✔️ Многоуровневая мультиарендность ✔️ Модульная архитектура✔️ Решение для сервис-провайдеров
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https://www.yubico.com/authentication-standards/fido2/
FIDO2 Passwordless Authentication | YubiKey | Yubico
Feb 4, 2026 - Learn how FIDO2 and passkeys eliminate password vulnerabilities with our complete guide to phishing-resistant authentication solutions.
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https://www.federalapostille.org/
Federal Apostille & Authentication Services Nationwide
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https://www.visual-guard.com/
Visual Guard - Application Security: Permissions, Authentication and Audit
Visual Guard secures your Applications: Manages users, memberships, roles and permissions. Define which data and features users can access in your applications.
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https://www.onespan.com/
eSignature, Authentication, Mobile App Security | OneSpan
OneSpan’s cybersecurity solutions protect users, devices and apps. Its digital agreements solutions speed business processes via electronic signature.
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https://webmail.carboniocloud.com/static/login/
Carbonio Authentication
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https://www.hanko.io/
Hanko | Modern Authentication. On Your Terms.
Open source, privacy-first, and built to scale. Hanko is the fastest way you integrate passkeys, 2FA, SSO, and more, with full control over your data. Move...
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https://www.legalization.vn/
Apostille, Legalization, Attestation, Authentication services in Vietnam - legalization
Consular Legalization, Apostille documents, Embassy Attestation, Authentication services for documents from other countries to use in Vietnam, and for Vietnam...
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https://w3c.github.io/webauthn/
Web Authentication: An API for accessing Public Key Credentials - Level 3
web authenticationan apipublic key
https://www.digitalenvoy.com/privacy-policy/
Privacy Policy - Digital Envoy, IP Intelligence and Authentication Solutions
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https://github.com/fail2ban/fail2ban
GitHub - fail2ban/fail2ban: Daemon to ban hosts that cause multiple authentication errors · GitHub
Daemon to ban hosts that cause multiple authentication errors - fail2ban/fail2ban
https://faceio.net/
FACEIO - Passwordless Facial Authentication Web SDK
Enable secure facial authentication with FACEIO Web SDK. Add passwordless face login, biometric verification, and liveness detection to your web or mobile app...
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https://testing.illuminateed.com/auth/quick
Quick Access Login | Authentication | Renaissance DnA Online Testing
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https://www.callsign.com/
Fraud Prevention, Authentication and Intelligence - Callsign
Marking a new era in passive authentication, fraud prevention and intelligence. We make digital identity simple and more secure.
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https://www.bouyguestelecom-business.fr/
407 Proxy Authentication Required
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https://eu.login.specopssoft.com/Authentication/
Specops Authentication
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https://clients.taxis.be/
Taxis Verts / Husk Authentication Page Selector
Taxis Verts / Husk customers adherent registered users authentication page
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https://fidoalliance.org/specifications/download/
FIDO Authentication Specifications | FIDO Alliance
Jun 8, 2026 - Access official FIDO authentication specifications to view user authentication standards, implementation guides, and technical resources for developers.
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https://caaps.ch/
Authentication required!
authenticationrequired
https://datatracker.ietf.org/doc/html/rfc4954
RFC 4954 - SMTP Service Extension for Authentication
SMTP Service Extension for Authentication (RFC 4954, )
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https://uclahealth.csod.com/samldefault.aspx?returnurl=%252fDeepLink%252fProcessRedirect.aspx%253fmodule%253dloRegisterAndLaunch%2526lo%253dd39c76d7-155a-4e7f-aa5f-f61e08951c4e
SAML Authentication Request
saml authenticationrequest
https://login.socialschools.eu/
Social Schools Authentication
social schoolsauthentication
https://blog.typingdna.com/adding-multi-factor-authentication-to-your-app-the-easy-way/
Adding multi-factor authentication to your app, the easy way - TypingDNA Blog
Dec 20, 2024 - Learn how you can easily add multi-factor biometric authentication to your app using TypingDNA API.
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https://powerdmarc.com/what-is-email-authentication/
What Is Email Authentication? How To Authenticate Emails
Mar 26, 2026 - Learn what email authentication is and how to authenticate your emails to prevent spoofing, boost deliverability, and protect your brand.
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https://wexiodisk.aftersalestools.com/Login.aspx
Spare Parts manual - Authentication
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https://thecyberhut.teachable.com/p/authentication-design-management
Authentication: Design & Management | The Cyber Hut
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https://o-key.typeform.com/to/E4hKv3Jg
Product Authentication Value Calculator
This short assessment helps estimate how much revenue and operational cost may be exposed to counterfeit products, grey-market resale, or unverifiable service...
product authenticationvaluecalculator
https://globalapostille.us/
USA apostille and authentication service, birth certificate apostille, apostille documents and...
Global Apostille is your reliable provider for certifying, authenticating and legalizing documents for use in foreign countries by individuals and businesses.
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https://auth.tisc.io/cookie-policy
Cookie policy | TISC Authentication Service
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https://daegu-op.org/
Authentication required - flowProxy
authenticationrequired
https://linear.app/developers/oauth-2-0-authentication
OAuth 2.0 authentication – Linear Developers
Linear supports OAuth2 authentication, which is recommended if you’re building applications to integrate with Linear.
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https://www.authrice.com/en/
Easy authentication for your services | Authrice helps you authorize users in your backend, native...
Easy authentication for your services | Authrice helps you authorize users in your backend, native and web apps
https://tax-stamps.org/
International Tax Stamp, Authentication & Traceability Association – ITSA
Improving the way tax stamps are developed and used
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https://www.dcapostille.com/
DC Apostille |embassy certification | apostille | authentication
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https://beckett.com/
Trading Card Grading, Authentication and Pricing - Beckett Collectibles
Beckett is the trusted leader in trading card grading, authentication, and online price guides, supporting sports and collectible card collectors.
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https://cheatsheetseries.owasp.org/cheatsheets/Authentication_Cheat_Sheet.html
Authentication - OWASP Cheat Sheet Series
Website with the collection of all the cheat sheets of the project.
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https://blog.pypi.org/posts/2023-05-25-securing-pypi-with-2fa/
Securing PyPI accounts via Two-Factor Authentication - The Python Package Index Blog
PyPI will require all users who maintain projects or organizations to enable one or more forms of two-factor authentication (2FA) by the end of 2023.
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https://magclive.collectronics.net/loginForm.jsp?redirect=/cfusion/cmroot/bin/
User Authentication Dialog
user authenticationdialog
https://p3ki.com/
Authorization & Authentication for a Connected World | P3KI
Next generation authorization and authentication for IT/OT convergence, inspired by the existing P3KI.com content but rebuilt with modern Jekyll tooling.
for aconnected worldauthorizationauthentication
https://fidoalliance.org/passkeys/
FIDO Passkeys: Passwordless Authentication | FIDO Alliance
May 4, 2026 - A passkey is a FIDO authentication credential based on FIDO standards, that allows a user to sign in to apps and websites with the same process that they use...
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https://www.digimarc.com/
Product Digitization for Authentication & Consumer Engagement
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https://cas.ccsd.cnrs.fr/cas/login
CCSD CAS – Central Authentication Service
ccsdcascentralauthenticationservice
https://www.drupal.org/project/shib_auth
Shibboleth Authentication | Drupal.org
Feb 13, 2024 - Provides user authentication with Shibboleth (both v1.3 and v2.0) as well as some authorisation features (automatic role assignment based on Shibboleth...
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https://www.allregs.com/tpl/public/allregs_lakeview.aspx
Guideline Authentication Page
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https://richmond.csod.com/samldefault.aspx
SAML Authentication Request
saml authenticationrequest
https://eastcarolina.csod.com/samldefault.aspx?ouid=2&returnURL=%252fDeepLink%252fProcessRedirect.aspx%253fmodule%253dlodetails%2526lo%253dc868c446-6f7c-48cf-bda8-32c74d9ad98f%2526e%253d2023%25252f12%25252f31/a
SAML Authentication Request
saml authenticationrequest
https://tstore.co.id/
Authentication - GLPI
authenticationglpi
https://www.beckett-authentication.com/
Sports & Non-sports Autographs, Memorabilia Authenticator | Beckett Authentication Services
Beckett Authentication Services provides expert third party opinions on autographs from all genres and eras. Autograph Authentication
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https://datatracker.ietf.org/doc/html/rfc7617
RFC 7617 - The 'Basic' HTTP Authentication Scheme
The 'Basic' HTTP Authentication Scheme (RFC 7617, )
the basichttp authenticationrfcscheme
https://github.com/SSSD/sssd
GitHub - SSSD/sssd: A daemon to manage identity, authentication and authorization for...
A daemon to manage identity, authentication and authorization for centrally-managed systems. - SSSD/sssd
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https://umiami.csod.com/samldefault.aspx?ouid=1&returnUrl=%252fDeepLink%252fProcessRedirect.aspx%253fmodule%253dlodetails%2526lo%253d030c54be-6594-4e38-8a4b-ccb67cbf3c71
SAML Authentication Request
saml authenticationrequest
https://dmarcly.com/
DMARCLY | Email Security, Authentication, Anti-Phishing, SPF, DKIM, DMARC Monitoring, and DMARC...
DMARCLY helps stop email spoofing, phishing, spam, business email compromise, ransomware, and improves email deliverability.
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https://oklahoma.gov/education/services/data-governance/mfa.html
Multi-factor Authentication (MFA)
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https://ixkio.com/
NFC Tag Authentication Platform - Ixkio
Secure products and collectibles with NFC authentication. Verify authenticity, prevent counterfeiting and manage NFC tag authentication at scale with ixkio.
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https://cjpia.csod.com/samldefault.aspx?ouid=2
SAML Authentication Request
saml authenticationrequest
https://sift.com/
Digital Fraud Prevention & Risk-Based Authentication | Sift
Jul 22, 2026 - Sift’s fraud prevention and risk-based authentication platform empowers digital businesses to grow fearlessly and reduce risk without compromising trust.
digital fraudpreventionriskbasedauthentication
https://depts.washington.edu/uwsom/
Shibboleth Authentication Request
shibbolethauthenticationrequest
https://www.eugridpma.org/
European Policy Management Authority for Grid Authentication
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https://docs.kakrlabs.com/
Welcome to the official developer documentation and API reference | Blockchain Authentication...
welcome to thedocumentation and apiofficialdeveloper
https://nam.gov.bn/edregister/user/RegisterUser
National Authentication Module
nationalauthenticationmodule
https://help.ticketsignup.io/support/solutions/articles/17000136654-overview-and-authentication-of-the-ticketsignup-zapier-app
Overview and Authentication of the TicketSignup Zapier App - TicketSignup
of theoverviewauthenticationticketsignupzapier
https://sso.myacg.org/login
Login - CAS – Central Authentication Service
cascentralauthenticationservice
https://kheiron-sp.io/
KSP - Authentication
kspauthentication
https://sogecashnet.sga.dz/smartoffice/
SGA - Authentication
sgaauthentication
https://www.elevensoftware.com/
Eleven: Simplifying Wi-Fi Authentication & Performance Management
ElevenOS offers seamless Wi-Fi authentication and performance management solutions for hotels, apartments, universities, and more.
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https://connect.esante-centre.fr/
Authentication portal
authenticationportal
https://realauthentication.com/
Luxury Designer Authentication Services - Real Authentication
Jul 10, 2026 - Global authority on luxury, designer authentication services for over 170+ brands across the world. Items with documentation sell faster.
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https://www.corbado.com/
Authentication Intelligence Platform | Corbado
Corbado turns passkey, password, OTP and fallback journeys into authentication intelligence across any IDP.
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https://idura.eu/
Idura - Secure eID, Authentication & Signatures
Jul 16, 2026 - We empower companies to integrate eIDs into websites or applications effortlessly, ensuring an efficient, secure login or signature process.
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https://dmarc.org/
dmarc.org – Domain Message Authentication Reporting & Conformance
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https://auth.ceris.purdue.edu/cas/login?service=https%3A//www.npdn.org/casservice%3Fdestination%3D/member-home
CAS - Central Authentication Service Login
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https://services.sunbiz.org/Filings/CertificateOfStatus/CertificateAuthentication
Certificate of Status Authentication
certificate of statusauthentication
https://www.aercapmaterialservices.aero/Account/Login?returnUrl=parts
Authentication View
authenticationview
https://dmarc.org/2016/03/best-practices-for-email-senders/
Best Authentication Practices for Email Senders – dmarc.org
for emailbestauthenticationpracticessenders
https://veraid.net/
User- and developer-friendly authentication based on DNS | VeraId
VeraId is a decentralised, user-friendly, offline-first authentication protocol powered by DNS
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https://techcommunity.microsoft.com/blog/exchange/updated-exchange-online-smtp-auth-basic-authentication-deprecation-timeline/4489835
Updated Exchange Online SMTP AUTH Basic Authentication Deprecation Timeline | Microsoft Community...
Jan 29, 2026 - We wanted to provide the updated Exchange Online SMTP AUTH Basic Authentication Deprecation Timeline.
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https://learn.microsoft.com/en-us/entra/identity/authentication/concept-mfa-licensing
Microsoft Entra multifactor authentication versions and consumption plans - Microsoft Entra ID |...
Learn about the Microsoft Entra multifactor authentication client and different methods and versions available.
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https://auth.univ-corse.fr/cas/login?id_site=46&locale=fr&service=https://iesc.universita.corsica/plugins/auth/auth_cas/auth_cas.php
CAS - Central Authentication Service Connexion
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