Kobo ebooks uses Adobe Digital Editions (ADE). So ebooks from Kobo use ADE DRM protection. Many other major ebook retailers also use ePub format for ebooks. It is very easy to remove DRM (Digital Rights Management) protection from ePub ebooks using Adobe Digital Editions DRM protection, so you can free your ebooks and read them on any device that you have including but not limited to
Kindle,
Sony Reader,
Nook,...
You don't need to be a hacker to crack the encryption of DRM protected ePub files using ADE DRM. Just download freeware ePub DRM removal plug-ins for freeware
Calibre. Not only will you be able to remove DRM from ePub using Calibre, but also convert unDRMed ebooks to the most popular formats (ePub/fb2/LRF/Mobi/PDF/PDB/TXT/RTF/LIT)
Download freeware ePub DRM removal plug-in for Calibre as well as freeware standalone ePub DRM removal software:
ebook DRM removal tools archive