Can anyone direct me where I might be able to locate this Kindle Series Number on my PC? I have looked to locate an Amazon Kindle Series Number for the PC with no success. As previously stated used KFX-begone4 to open my Kindle App for PC to add the ebook to Calibe for EPUB conversion previously the ebook would arrive in the AZW3 or MOBI format now only arrives in the KFX-ZIP format and cannot convert due to DRM lock. I have never had an Amazon Kindle Series Number since I have always use my Kindle App for PC and not a physical Kindle device. Looking online for the latest information to remove Amazon Kindle Ebook DRM for 2023 - I have noticed that an Amazon Kindle Series Number is required for Calibre. Is this because of the new amazon version upgrade?

If any are gotten wrong, which is likely without a way to test them properly, Amazon would immediately use that one for now and then keep adding more new ones over time.Įven if someone managed to get all of the algorithms correct, DRM removal would only work until Amazon deployed software with more new algorithms and blocked downloads to the older software.Using Kindle App for PC and had to upgrade to Kindle v 1.39 to download new books and now KFX-begon4 is no longer able to remove KFX-ZIP for calibre conversion. In order to defeat KFX DRM in DeDRM all of the thirty or so remaining DRM algorithms would need to be reverse engineered. Making it known to the world would just result in Amazon switching to V12, causing all of that hard work to be for nothing. Keeping it quiet would mean that at least they could make use of it. Amazon is currently using V11, which DeDRM attempts to decrypt but does not do correctly.Īs things stand now anyone who does figure out how to defeat the current V11 DRM has a strong incentive to keep it to themself. They are built into the various Kindle apps and device firmware as highly obfuscated code.Įach algorithm is identified with the letter V followed by a number. Amazon has implemented around 40 different DRM algorithms for KFX.

Amazon kfx drm removal