Which technology is used to manage identity access management by building trust relationships between organizations?

The technology that is utilized to manage identity access management by establishing trust relationships between organizations is federation. Federation allows organizations to share identity information and enable users from one organization to access resources in another organization without needing separate login credentials. This is accomplished through standards and protocols that facilitate the sharing of identity and access rights.

In a federated identity system, trust is established between identity providers (IdPs) and service providers (SPs), allowing users to authenticate once and gain access to services across multiple domains. This is particularly useful in scenarios such as collaborations between businesses or when federating access to cloud services.

Single sign-on mainly focuses on enabling a user to log in once and gain access to multiple applications; however, it doesn't inherently manage trust relations between separate organizations. Multifactor authentication enhances security by requiring multiple verification methods but does not create trust relationships. Biometric authentication is a mode of verification based on physical characteristics, but it also does not address the issue of inter-organizational trust. Therefore, federation is the most suitable answer in this context.