Henri Gilbert Matthew J. B. Robshaw Yannick Seurin How to Encrypt with the LPN Problem. 679-690 2008 ICALP (2) http://dx.doi.org/10.1007/978-3-540-70583-3_55 conf/icalp/2008-2 db/conf/icalp/icalp2008-2.html#GilbertRS08