1. A method for establishing credentials for securing text message communications, the method comprising: receiving, at a text messaging hub executing at a server device, from a device, a first text message, the first text message being directed to a service number and including a user number and a request to establish a secure credential for communicating with a text messaging application via the text messaging hub; transmitting, by the text messaging hub executing at the server device, to the device, an initiation message including a user-specific system number to which the device is to direct future text messages; receiving a second text message that includes the user number; determining that the second text message is not authentic in response to determining the second text message is not directed to the first user-specific system number; and transmitting, by the text messaging hub executing at the server device, to the device, a notification message that includes a second user-specific system number to which the device is to direct future text messages in response to determining the second text message is not authentic, the second user-specific system number being different from the first user-specific system number.
3. The method of claim 1 , wherein the initiation message is sent to the device at a pre-approved e-mail address, a web portal software application, or other communication form associated with the device.