Preimage and pseudo collision attacks on round-reduced DHA-256 hash function
A preimage attack on DHA-256 hash function reduced to 37-round and a Volumizer pseudo collision attack on the func-tion reduced to 39-round were proposed respectively.Based on the meet-in-the-middle attack,the Biclique technique was used to improve the preimage attack from 35-round to 37-round.A 39-round pseudo collision was achieved using Home and