There is only one file type that uses the .KDE extension:
KryptoStorage Container File
File created by KryptoStorage and other Kaspersky antivirus and computer protection products; saves an archive of files in a password protected, encrypted format; allows users to securely store and archive sensitive personal data.
Kaspersky Labs no longer offers KryptoStorage as a standalone product. Instead, the company recommends using Kaspersky PURE software for protecting personal data. Kaspersky PURE allows users to create encrypted virtual drives, which contain a KDE file that securely stores the data. The program labels this file type as a "KAV Shell Extension."
|Kaspersky PURE||Free Trial|
Updated: March 13, 2017