@INPROCEEDINGS{4577815, author={Ren, Wei and Ren, Kui and Lou, Wenjing}, booktitle={2008 The 28th International Conference on Distributed Computing Systems Workshops}, title={Optimized User Revocation for Group Signature Based Privacy-Aware PKI}, year={2008}, volume={}, number={}, pages={388-393}, doi={10.1109/ICDCS.Workshops.2008.95}}