Skip navigation

Our Product

Our Product

Simple Tools for Complex Security Needs

Connect and protect your employees, business partners and customers with identity-powered security.

Explore All Products

How Does Duo Work for You?

Get the security features your business needs with a variety of plans at several price points.

Duo for Small to Medium Businesses

Desktop and mobile access protection with basic reporting and secure single sign-on.

Duo for Enterprise

All Duo Small/Medium Business features, plus adaptive access policies, greater device visibility, plus advanced device insights and remote access solutions.

Duo for Federal Government

FedRamp authorized, end-to-end FIPS compliant, streamlined solutions.

Duo for State and Local Government

Meet compliance objectives with our friction-free MFA.

Compare Editions Ready to Buy Now?

Key Capabilities

Duo provides secure access to any application with a broad range of capabilities.

Multi-Factor Authentication (MFA)

Verify the identities of all users with MFA.

Remote Access

Provide secure access to on-premise applications.

Device Trust

Ensure all devices meet security standards.

Single Sign-On (SSO)

Provide secure access to any app from a single dashboard.

Adaptive Access Policies

Block or grant access based on users' role, location, and more.

Explore Demos Contact a Duo Rep
Solutions

Solutions

Secure Access for a Variety of Industries & Use Cases

Duo’s security is customizable, easy to set up and simple to use, making it the perfect solution for a wide range of industries.

Explore Our Solutions

By Industry

Duo provides secure access for a variety of industries, projects, and companies.

K-12 Education

Higher Education

Finance

Healthcare

Legal

Retail

Technology

Federal Government

State & Local Government

Meeting Your Goals

Whether you're considering a big-picture security strategy like zero trust, or you want to address a specific threat like phishing attacks, Duo has you covered.

Access Management

This set of tools and policy controls ensures only the right users have access to applications and resources and under the right conditions.

Zero Trust Security

A zero trust model establishes trust in users and devices through authentication and continuous monitoring.

Passwordless

Duo's comprehensive access security sets the stage for user-friendly, password-free multi-factor authentication.

Phishing Prevention

Secure your workforce against phishing attacks with strong multi-factor authentication, device trust and more.

Risk-Based Authentication

Duo’s dynamic solution detects and responds to potential threat signals to secure trusted users and frustrate attackers.

Explore Demos Contact a Duo Rep
Why Duo?

Why Duo?

Strong MFA Security that Doesn't Sacrifice Productivity

With Duo, you can have both, in a platform that integrates across your entire ecosystem. Every user, every device, no exceptions.

Why You Should Choose Duo

Have It All

Duo delivers peace of mind with strong security and increased productivity at an unmatched value.

Speed to Security

Reduce friction and automate processes so that end-users and administrators can focus their time on moving your business forward.

Next Level MFA

Duo continues to pioneer MFA-approaches that keep your business a step ahead of the next threat.

Protection and Productivity

Our Risk-Based Authentication reduces the burden placed on users so they can verify their identity quickly and get back to the task at hand.

Complete Coverage

Close the gap on your security perimeter and bring every user and every device under one secure roof.

Explore Customer Stories

Duo provides secure access for a variety of industries, projects, and companies.

Explore Duo Demos

Click through our instant demos to explore Duo features.

About Duo

Duo Security is part of Cisco Security — find out how we make global security resilience easier than ever!

Explore Demos Contact a Duo Rep
Pricing
Duo Blog
Docs & Support

See All Duo Documentation

Getting Started with Duo

Duo Essentials Edition

Remote Access & VPN

See All Duo Resources

Events & Webinars

eBooks

Duo Videos

See all Duo Support

Support for Duo Users

Support for Admins

Additional Support Information
Admin Login

Contact Sales Free Trial

← Back to Index

Certificate Authority (CA)

An entity that issues digital certificates as part of a Public Key Infrastructure (PKI). Certificates issued by CAs verify the identity of the "issued-to" object to third-parties. Secure Sockets Layer (SSL) and Transport Layer Security (TLS) rely on CA certificate verification when establishing secure communications.

External Sites

Duo Documentation: Duo Access Gateway for Linux

Duo Documentation: Duo Access Gateway for Windows

Duo Documentation: Duo Authentication for Epic

Duo Documentation: Duo Network Gateway

Duo Knowledge Base: Can the Duo Access Gateway be configured to use multiple primary authentication sources each with a different certificate?

Duo Documentation: Trusted Endpoints - AirWatch Managed Device Deployment

Duo Documentation: Trusted Endpoints - MobileIron Cloud Managed Device Deployment

Duo Documentation: Two-Factor Authentication for CyberArk Privileged Account Security

Duo Knowledge Base: What are the differences between DAG for Linux and DAG for Windows?

Duo Knowledge Base: Why do Trusted Endpoints certificates have to be issued by Duo?