关键词: 哈希函数, 海绵结构, 安全分析, 执行效率

Abstract: Today, more and more devices used in the Internet of things brought about a great need of Hash function, but traditional Hash functions can’t be applicated directly because of the restrained resources, so it must be redesigned for those devices. A new lightweight Hash function called HBL（Hash Function Based on LEA） is proposed in this paper, which constructed in a popular way, including domain extender and internal permutation, both of its key size and digest size are 128 bit, in which the domain extender adopts a sponge structure and the internal permutation is an 8-round block permutation. A security analysis and an execution efficiency analysis are made by a way combined theories and experiments, and it is found that HBL presents a good resistance to differential attack, preimage attack, collision attack, linear attack and slide attack, also has a good efficiency.

Key words: Hash function, sponge structure, security analysis, execution efficiency