In federated networks, trust management is critical to information sharing and online collaboration. Security tokens provide a way to convey and exchange trustrelated information for security and privacy purposes. Common users encounter difficulties when they have to handle security tokens across heterogeneous domains. Semantic gaps and incompatibilities are major barriers for trust-related information exchange in federated trust management. This paper uses intermediary-based, querybased and hybrid approaches to resolve these issues for different types of information in security tokens, and proposes three exchange models accordingly. This paper also provides a comprehensive framework using web services to exchange security tokens across security domains with suitable approaches and exchange models.