Based on deep studying interrelation and the similarity of algorithm of SHA-1

SHA-224 and SHA-256

an IP core containing these three kinds of algorithms was developed and redesigned.It speeds up the operation and improves the performance

in particular of saving area

resource optimization and good portability.It meets multilevel security and integration optimization requirements of various clients

supporting double reset

interrupt and low-power mode

as well as reading and writing operations midway.