A key security feature of HashPack is that it is non-custodial. This means that none of your sensitive data is ever sent over the internet. The private key that you enter when you import your account is encrypted on your device and never sent over the internet.
Because of this, you remain completely in control of your account information. HashPack does not gather any sensitive account information. Remember to secure your private key or 12/24-word recover phrase, as there is no way to recover it if you lose them.