Trustmark

A trustmark is "[a] badge, seal, image or logo that indicates a product, device, or service provider has met the requirements of the Identity Ecosystem, as determined by an accreditation authority. To maintain trustmark integrity, the trustmark itself must be resistant to tampering and forgery; participants should be able to both visually and electronically validate its authenticity. The trustmark provides a visible symbol to serve as an aid for individuals and organizations to make informed choices about the providers and identity media they use."

Source
The White House, (Draft) National Strategy for Trusted Identities in Cyberspace: Creating Options for Enhanced Online Security and Privacy 34 (June 25, 2010).