The 'DVD Jon' retrial ended yesterday with prosecutors demanding a suspended 90-day jail term.
A final verdict from the Oslo Appeals Court is due on December 22.
Jon pleaded not guilty to charges of braking Norwegian copyright law. He had cracked the copy-protection code on commercial DVDs, which allowed non-legal copying.
The Oslo district court established in January that Johansen could do whatever he wanted with DVDs that he had legally bought. It also said prosecutors had failed to prove that his program – called DeCSS – had been used for illegal copying.
His defence focused on consumer rights, Reuters reports.