Jeffrey Hoffstein Nick Howgrave-Graham Jill Pipher Joseph H. Silverman William Whyte NTRUSIGN: Digital Signatures Using the NTRU Lattice. 122-140 2003 conf/ctrsa/2003 CT-RSA http://link.springer.de/link/service/series/0558/bibs/2612/26120122.htm db/conf/ctrsa/ctrsa2003.html#HoffsteinHPSW03