BarterCast is a protocol to exchange the altruism levels of peers. Altruism is defined as the amount of uploading versus downloading of a person. The goal is to create incentives for cooperation. (See IncentiveSystems for an overview of other incentive mechanisms.)
Attached is a draft 8-page paper of Dispersy, a system used for signatures and targeted to replace BarterCast eventually. It uses Bloom filters, see for detailed documentation: IPv8Datasync and thesis work
A lot of draft info on BarterCast is located here
Our first research paper on BarterCast. A greatly expanded version with a performance evaluation is pending publication.
Source of info
Key research challenges