Aimster fights record industry with its own fuel - Tech News - CNET.com In addition, Aimster is attempting to shield itself behind the very law the entertainment industry has used to go after file-swapping company Napster. The Digital Millennium Copyright Act (DMCA), a controversial law backed by music companies and other large copyright holders, prohibits anyone from cracking code designed to protect copyrights. Aimster, which incorporated an encryption scheme into a new version released Wednesday, hopes that provision applies to it as well.