What action can be taken to ensure a notification is sent securely?

To ensure a notification is sent securely, utilizing SSL encryption is an effective method. SSL (Secure Sockets Layer) encryption protects data transmitted over the internet by creating a secure channel between the sender and recipient. When notifications are sent over a network, SSL encrypts the information such that only the intended recipient can decrypt and read it, preventing unauthorized access or interception by malicious entities.

While other options may seem beneficial in enhancing security, SSL encryption specifically addresses the secure transmission of data, which is critical when notifications may contain sensitive information. For instance, setting a password for notifications could help regulate access but doesn't inherently secure the data during transmission in the same robust manner as SSL. Verifying the sender's identity is also important for trust but does not encrypt the data itself. Therefore, SSL encryption is the primary and most essential action to ensure secure notification delivery.