A hacker named No_One published a PDF hackers supposed to help better understand the firmware 3.6x with the aim to help get the decryption key of said firmware and create a CFW.
The document is based on the use of a dual system firmware through the integration of a second NOR Flash / NAND. Although the presentation is clear, the content is nevertheless technical and requires some knowledge.
All this remains theoretical and there is no evidence that this information will achieve the objective.