We can understand your concern for the security of your data. But in Enpass, your data always stays encrypted by AES-256 bit encryption using your master password. So the safety of your data eternally depends upon how strong is your Master Password as the encryption key for your keychain is derived from the same. Stronger the master password, safer is your data.
Moreover, in the worst scenario, if someone gets hands on your encrypted data file, then your data will appear as total gibberish, and he can’t see actual data without the master password. To know more about security in Enpass, please visit here.