@InProceedings{	  ronald-7,
  title		= {{Towards practical privacy-preserving Digital Rights
		  Management for Cloud Computing}},
  author	= {Nakul Joshi AND Ronald Petrlic},
  booktitle	= {{Proceedings of The 10th Annual IEEE Consumer
		  Communications \& Networking Conference (CCNC 2013)}},
  year		= {2013},
  pages		= {259--264},
  abstract	= {We propose a privacy-preserving digital rights management
		  scheme for (future) cloud computing. Users buy software
		  from software providers and execute it at computing
		  centers. Our solution allows software providers to provide
		  different license models, like execute at most n-times
		  models. Users{\rq} anonymity and unlinkability of actions
		  are preserved and thus, profile building is not even
		  possible under (a) pseudonym. Privacy protection in the
		  honest-but-curious model is achieved by combining ring
		  signatures with an anonymous recipient scheme.We employ
		  secret sharing in a unique manner that allows the software
		  provider to expose the user{\rq}s identity if the user
		  commits fraud, e.g. by exceeding the execution limit n.}
}