Johannes Buchmann Erik Dahmen Michael Schneider 0002 Merkle Tree Traversal Revisited. 63-78 2008 PQCrypto http://dx.doi.org/10.1007/978-3-540-88403-3_5 conf/pqcrypto/2008 db/conf/pqcrypto/pqcrypto2008.html#BuchmannDS08