US Patent 9426227 Connection leasing for hosted services

Aspects herein describe brokering hosted resources in a virtual desktop infrastructure (VDI) using connection leases to reduce demand on connection brokers and to allow hosted services to be maintained even in the event of a broker outage. When a client device desires to connect to a hosted resource (e.g., a hosted desktop or a hosted application), the client device may present a lease token to the session host. The lease token is a self-sustaining package of data from which a session host can determine whether the requesting client device is authorized to access one or more resources hosted by that session host. The lease token may be cryptographically signed to ensure its contents have not been altered, and further that the lease token originated from a trusted source. Lease tokens may be stored independently from a connection broker, thereby still being usable if the connection broker goes offline.