Jintai Ding John Wagner Cryptanalysis of Rational Multivariate Public Key Cryptosystems. 124-136 2008 PQCrypto http://dx.doi.org/10.1007/978-3-540-88403-3_9 conf/pqcrypto/2008 db/conf/pqcrypto/pqcrypto2008.html#DingW08