Blaze, MattKannan, SampathLee, InsupSokolsky, OlegSmith, Jonathan MKeromytis, Angelos DLee, Wenke2023-05-222023-05-222009-02-012009-05-08https://repository.upenn.edu/handle/20.500.14332/6449Trust management forms the basis for communicating policy among system elements and demands credential checking for access to all virtual private service resources—along with careful evaluation of credentials against specified policies—before a party can be trusted.© 2009 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.CPS Internet of ThingsArticle