IACR News item: 11 April 2015
James Alderman, Christian Janson, Carlos Cid, Jason Crampton
ePrint ReportDelegation and verification rely only on public parameters, and thus PVC lends itself to large multi-user systems where entities need not be registered, yet in such settings the individual user requirements may be diverse.
In this paper, we introduce Hybrid PVC (HPVC) which, with a single setup stage, provides a flexible solution to outsourced computation supporting standard PVC, the enforcement of access control policies restricting the servers that may evaluate a given computation, and a reversed model of PVC which we call Verifiable Delegable Computation (VDC) where data is held remotely by servers. We provide formal frameworks and constructions for such systems.
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