What is a DB.CRYPT File Type?
WhatsApp uses the DB.CRYPT file to secure the d'message database; a user on an Android device. WhatsApp uses a different algorithm to encrypt DB files for each new version of the application. Appended to the .DB file, such as .CRYPT6, .CRYPT7, .CRYPT8 or .CRYPT12, means the algorithm used for encryption.
The DB.CRYPT database files are located on the SD card of your Android device. The file is located in the following directory:
WhatsApp / Databases.
What is a Default DB.CRYPT File Name?
Msgstore.db.crypt - Database file name used by WhatsApp Messenger to store chat messages.