?url_ver=Z39.88-2004&rft_id=10.4218%2Fetrij.08.0207.0188&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Asim%2C+M.&rft.aulast=Asim&rft.aufirst=M.&rft.date=2008&rft.issn=12256463&rft.title=ETRI+Journal&rft.pages=170-172&rft.atitle=Efficient+and+simple+method+for+designing+chaotic+S-boxes&rft.issue=1&rft.volume=30&rft.genre=article