广义可调加密方案

Generalized tweakable enciphering schemes

可调加密方案是一类大分组的可调分组密码.为发现更多高效的可调加密方案以及更多的可调加密方案的实现方法,提出广义可调加密方案.通过定义加密方案的可用函数序列,函数序列的不同构造方法以及函数与方案之间的映射关系,得到一系列新的高效的可调加密方案.在所有这些方案中,部分可调加密方案在效率上优于原方案,其他方案在效率上和原方案相当.同时,也发现几种可调加密方案新的实现方法.

The tweakable enciphering scheme is a kind of wide-block tweakable block cipher. In order to find more efficient tweakable enciphering schemes and more implementation methods, we propose generalized tweakable enciphering schemes. By defining an allowed function sequence, different construction methods for the function sequence, and the mapping from the function sequence to the enciphering scheme, we get many new tweakabte enciphering schemes. Among them, some are better than the original scheme in efficiency, others are comparable to it in efficiency. At the same time, some new implementation methods for the tweakable enciphering scheme are discovered.