Strong Authentication via Patented Grid Card Technology

Unique to each user, Entrust’s patented grid card is a low-cost, easy-to-use form factor and one of the most popular authenticators in the industry.

Identical in capability to physical grid cards, electronic grids (eGrids) may be sent to users via the Web or as a PDF. These can be easily stored on a machine or mobile device for convenient access, eliminating the need to carry a physical form factor.

How to

card_back-patentThe user is presented an authentication challenge when they log in to a restricted network, application, cloud service or site.

The user refers to their unique grid card to provide the information from the requested cells.

  • In this example, we’ll challenge the user with the following: B1, F3, J4.
  • The user responds with: 11, H7, X8.


Assigned to Entrust in 2005 by the Eastman Chemical Company, U.S. Patent 5,712,627 (the “‘627 Patent”) was issued on January 27, 1998, by the United States Patent and Trademark Office.

Among other things, the ‘627 Patent’ covers all methods for determining whether a person seeking access to a secured system is authorized to do so where the determination about the right to access the secured system is confirmed using some form of grid authentication with or without an accompanying password.

Learn More


Having trouble selecting an authenticator that’s right for your organization? While Entrust IdentityGuard provides the flexibility and scalability to either migrate from one to the other or match an authentication to risk, it’s still reassuring that you’re deploying the correct method.

  • Do you want authentication to be transparent to the user?
  • Would you like the user to carry a physical device or authenticate online?
  • Do you want the Web site to authenticate itself to the user as well?
  • How sensitive is the information you are protecting and what is the associated risk?

Read the Data Sheet


Entrust IdentityGuard is an award-winning software-based authentication solution that secures many of the world’s leading financial institutions, enterprises and governments.

Entrust IdentityGuard

Entrust IdentityGuard serves as an organization’s single comprehensive software-based authentication platform, while concurrently bridging them to emerging technologies for strong mobility, cloud and credentialing offerings. It offers improved confidence for online transactions and identity authentication for access to applications or resources.

Learn More