Although WhatsApp has end-to-end encryption of conversations, this feature does not cover them backups in the cloud, which are uploaded in an unencrypted state. THE application που ανήκει στο Facebook αναφέρει στις ρυθμίσεις δημιουργίας αντιγράφων ασφαλείας ότι “Τα μηνύματα και τα μέσα που δημιουργούνται στα αντίγραφα ασφαλείας του Google Drive are not protected by WhatsApp's end-to-end encryption”.
But we did know that the company had been testing encrypted backups in the cloud for over a year, and after it was added to WhatsApp beta a few months ago, the new feature began to be available to everyone. 
Starting today, app users have the option to end-to-end encrypt their backups before uploading them to Google Drive or iCloud. WhatsApp naturally boasts that no other messaging service provides this feature to its customers.
Despite offering this feature that ensures that neither WhatsApp nor the cloud service provider can read your messages, encrypted backups of your chats are still an optional level of security. Of course, there are some things you need to know.
Backups can be end-to-end encrypted using a password access of your choice or a 64-bit key. However, if you forget the encryption key, there is no way to restore the backups. Even WhatsApp won't be able to initiate this process as it claims it doesn't have access to your key at all.
It also seems that this feature is being distributed gradually, as we do not yet have it on our devices. You can see Settings> Conversations> Chat Backup> Encrypted Backup if you can now.
