Skip to content
Contact us Speak to an expert
Speak to an expert
Digital account authentication
3-D Secure ACS 3-D Secure Server 3-D Secure Server Directory
Authentication Advisor
Platform
AdobeStock_1899590001_1

Powering authentication, payments, and risk intelligence from a unified, context-aware foundation
Reduced cost of fraud Better customer experience Higher transaction success rates Operational cost savings Regulatory compliance
Digital banking and fraud prevention Passwordless authentication Call center authentication 3-D Secure payments
Retail and commercial banks Merchants, acquirers, and PSPs Issuing banks and payment processors Neobanks and fintechs Digital banking platforms Credit unions

Discover the Entersekt difference: built into the platform and the partnership to be context-aware, market-focused, and close to customers.

Leaders and investors Case studies Our delivery process Partners Press releases In the news Compliance and certifications
icon large - user journey-1

Entersekt support

Already an Entersekt customer? Have some technical or support questions?

Visit our support page
icon large - user journey-1

Careers

Interested in joining our team and reshaping the world of authentication?

Check out our careers page
Why Entersekt
Firefly_

A different approach to digital banking and payment authentication

Whether you’re shaping strategy, evaluating solutions, or staying ahead of emerging threats, this is where you'll find perspectives grounded in industry experience and focused on what works in practice.

Blog Case studies White papers and ebooks Events Videos and webinars Podcasts Glossary and encyclopedia
icon large - user journey

Featured content

Hand holding a credit card Payments

3DS is an authorization tool. Most of the industry just doesn't know it yet

Blog Read more
Case study
Swisscard logo

Swisscard replaces OTPs to authenticate online payments
Contact us

Modirum ACS

Glossary & encyclopedia
Entersekt | Resources | Glossary | Modirum ACS
Modirum ACS, also known as 3-D Secure Access Control Server, is a critical component in the 3DS authentication process. The Modirum ACS is responsible for verifying the identity of a cardholder during an online transaction. Operated by a card issuer or their service provider, the ACS receives authentication requests and determines whether to approve or challenge a transaction based on risk signals and available data. By facilitating secure communication between the issuer and the cardholder, the Modirum ACS helps prevent fraud and enables seamless, low-friction authentication experiences. Modirum is a global technology leader delivering innovative digital solutions and services across diverse industries leading provider. Modirum’s 3-D Secure software was acquired by Entersekt. The 3DS solutions help FIs deliver modern e-commerce transactions that balance security and a seamless customer experience.
Want to speak to one of our sales experts? Contact us today

Keep exploring

M
All insights

Find the right path forward

Explore the solutions most relevant to your organization

Solutions by outcome

Explore the outcomes that matter most, from fraud reduction to lower friction.

Explore by outcome

Solutions by use case

Find the right path for the challenges you need to solve across channels and journeys.

Explore by use case

Solutions by industry

See how Entersekt supports banks, credit unions, and other financial institutions.

Explore by industry

We don't just protect - we revolutionize

See how Entersekt helps financial institutions move forward

Explore the platform Speak to an expert

Continue reading...