3-Way is a block cipher, which was invented in 1994 by Joan Daemen. She has a block and key length of 96 bits. 3 -way can be carried out with any number of rounds; the developer recommends eleven rounds.

A target in the development of block cipher was to provide an efficient implementation in hardware.

In 1997 it was discovered that 3-Way is vulnerable to a "related -key attack".