Component-based　systems　are　developed　by　combining　independently　designed　and　sold　software　components.　It　promises　an　easier　reuse　of　components　resulting　in　a　significant　reduction　of　the　efforts　and　costs　to　produce　software　applications.　However,　a　maliciously　acting　component　may　easily　damage　the　application　incorporating　it.　In　this　study　we　introduce　an　approach　addressing　the　trusted　interaction　issues　by　analyzing,　acquiring　and　verifying　the　collaborative　behavior　among　components.　Both　collaborative　paths　among　components　and　the　correspondent　time　constraints　along　the　collaborative　paths　are　considered　as　the　expected　behavior.　Combined　with　the　collaborative　path　and　time　constraint,　the　acquiring　approaches　about　expected　behavior　among　components　are　presented.　Applying　UML　and　Pi　calculus　theory,　the　acquiring　approaches　about　the　collaborative　path　are　described.　Based　on　the　timing　sequence　diagram,　the　time　constraint　acquiring　approaches　are　also　described.　A　framework　to　verify　and　monitor　the　collaborative　behavior　among　components　is　designed,　and　the　related　implementation　issues　are　discussed.　A　case　study　is　given　at　last.　The　results　showed　the　feasibility　and　validity　of　application　of　the　model.　©　2012　Binary　Information　Press.