Abstract
Trust between agents is a key issue in multi-agent ecommerce system (MECS). With the expanding of system scale and the rapid increase of e-commerce, scalable trust in e-commerce system becomes critical. This article examines scalable trust of a system, in particular in ecommerce system, and classifies the trust between agents in e-commerce system. Then it discusses the realization of scalable trust from the viewpoint of sociology and engineering.