Blink is a full reserve custodial Lightning wallet. Most of the funds held in the wallet are held in cold storage using a multi-signature (multi-sig) quorum. A small portion of the funds are kept in a hot wallet in order to provide a seamless Lightning payments experience.
Prevent unauthorized access
Lock down your Blink account with biometric authentication, email one time passwords (OTP) and 2-Factor Authentication (TOTP).
Once you have enabled email login, you can remove your phone number to reduce the impact of SIM swaps.