Patent attributes
A user device outputs an unlock code or sends a signal that automatically unlocks a locked container housing a deliverable product when the user device authenticates the container, thereby indicating that the container has been delivered to an intended recipient. The device is associated with a user profile and stores a private key that is inaccessible except by the device. When a product order becomes associated with the user profile, a public key that pairs with the private key is encoded on a storage medium of the container. When the container is brought into proximity with the device, if the device determines that the public key encoded on the storage medium corresponds to the private key stored on the device, the device displays or audibly outputs an unlock code or sends a wireless signal that automatically unlocks the container. The container can also include sensors for detecting theft or tampering.