Publicly Posted Composite Documents in Variably Ordered Workflows
Balinsky, Helen; Chen, Liqun; Simske, Steven J;
Keyword(s): composite document; sensitive data protection; ordered; unordered and mixed workflows
Abstract: Recently-introduced Publicly Posted Composite Documents (PPCDs) address the problem of composite documents with different formats and differential access control participating in cross-organizational workflows distributed over potentially non-secure channels. An early version of the PPCD only considered two simplest workflow types: ordered and unordered. In real life, however, fragments of such pure types are likely to be combined into mixed workflows with interleaved ordered and unordered workflow steps. In the current paper, we introduce a payload matrix for a generic mixed workflow. We provide a computationally beneficial solution for enforcing access in ordered workflows by reducing the volume of data that needs to be encrypted and then.
External Posting Date: December 8, 2011 [Abstract]. Approved for External Publication
Internal Posting Date: November 8, 2011 [Fulltext]