Samsung KNOX provides security features that enable business and personal content to coexist on the same handset. The KNOX-protected packages are encrypted with 256-bit AES algorithm.

It is not possible to overwrite KNOX packages because they are protected.

The user can handle the situation in a couple of ways:

• Uninstall KNOX before erasure and then erase device. This is the recommended practice.
• Erase device regardless of KNOX. KNOX packages are not overwritten, but they can be considered as cryptographically erased because the packages are encrypted and the encryption keys are changed.
• Configure in settings that devices with KNOX are not erased. If erasure for KNOX device is attempted in this case, there will be a pop-up saying that KNOX should be uninstalled.