What is Verisign known for?

Verisign is primarily known for offering assurance regarding data security, particularly through its role in the management of domain name services and providing security infrastructure for the internet. As a prominent provider of digital certificates, Verisign helps organizations establish secure communications over the internet, enabling encryption and authentication processes that are essential for protecting sensitive data. This assurance is crucial for businesses and individuals who rely on secure online interactions, such as online banking, e-commerce, and sensitive information transfer.

The other options do not accurately represent Verisign's core business. Providing free digital certificates is not a service offered by Verisign, as their business model involves paid services to ensure that high standards of security and trust are maintained. Allowing unsecured communications contradicts Verisign's mission of enhancing security; their focus is on securing communications rather than allowing them to be unsecured. Lastly, while Verisign operates in the digital realm, they do not develop hardware for data storage, which is outside the scope of their services that are primarily related to internet security and domain management.