We start with a 22-round generic attack on the structure of Lesamnta, and adapt it to the actual round function to attack 24-round Lesamnta. We then show a generic integral attack on 20-round Lesamnta (which can be used against the block cipher itself). We follow with an attack on 9-round SHAvite-3_{512} which is the first cryptanalytic result on the hash function (which also works for the tweaked version of SHAvite-3_{512}).
Category / Keywords: secret-key cryptography / Lesamnta, SHAvite-3, Cancellation Attack Date: received 27 Dec 2009, last revised 22 Aug 2010 Contact author: orr dunkelman at weizmann ac il, charles bouillaguet@ens fr, gaetan leurent@ens fr Available format(s): PDF | BibTeX Citation Note: Previous upload was broken... Version: 20100822:160836 (All versions of this report) Short URL: ia.cr/2009/634