Copyright 1998 Ross Anderson, Eli Biham, Lars Knudsen
Copyright 1993 Colin Plumb
Copyright 1998 James H. Brown, Steve Reid
+ Copyright 1998 Miquel van Smoorenburg, Ian Murdock
Copyright 2000 Vincent Rijmen, Antoon Bosselaers, Paulo Barreto
Copyright 2001 Joey Hess
Copyright 2000-2006 Joachim Henkea