?url_ver=Z39.88-2004&rft_id=10.1109%2FAPCC.2011.6152920&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=M.I.&rft.au=Khan%2C+M.I.&rft.aulast=Khan&rft.title=A+joint+watermarking+and+encryption+scheme+for+DCT+based+codecs&rft.date=2011&rft.isbn=9781457703881&rft.genre=proceeding