Susan B. Davidson Sanjeev Khanna Val Tannen Sudeepa Roy Yi Chen 0001 Tova Milo Julia Stoyanovich Enabling Privacy in Provenance-Aware Workflow Systems. 215-218 2011 CIDR http://www.cidrdb.org/cidr2011/Papers/CIDR11_Paper30.pdf conf/cidr/2011 db/conf/cidr/cidr2011.html#DavidsonKTRCMS11