Shiva Prasad Kasiviswanathan Homin K. Lee Kobbi Nissim Sofya Raskhodnikova Adam Smith What Can We Learn Privately? 531-540 2008 FOCS http://dx.doi.org/10.1109/FOCS.2008.27 conf/focs/2008 db/conf/focs/focs2008.html#KasiviswanathanLNRS08