The flag's description is "Use the patented IDEA algorithm". This should be updated because the patents on IDEA have expired: Europe: EP0482154 on 2011-05-16, Japan: JP3225440 on 2011-05-16, U.S.: 5,214,703 on 2012-01-07.
Ulrich you're the one who care the most about it, so I guess feel free to deal with everything about idea yourself :)
Fixed.