The lad - nicknamed "DVD Jon" - was acquitted by an Oslo court today on all counts.
Reports said the court found there was no evidence that Johansen or anyone else on the Internet had used a decryption code he devised for illegal purposes.
Johansen had claimed that he developed the DeCSS software in order to be able to view a DVD disk he owned on another machine.
The prosecution alleged that he had conspired with a number of other individuals on the Internet to crack DVD codes.
The powerful MPAA, backed in the US by a number of politicians, had pushed for Norwegian prosecutors to bring the case against Johansen, who was 15 when he first cracked the codes on the DVD. ยต
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