However , the project was ended .
However , the project was declared a failure on 2004 - 03 - 08 after searching the entire 56 - bit keyspace , failing to turn up a valid key for unknown reasons .
However , the project was ended and declared a failure on 2004 - 03 - 08 after searching the entire 56 - bit keyspace , failing to turn up a valid key for unknown reasons .