| CPC H04L 63/08 (2013.01) [G06F 16/219 (2019.01); H04L 63/123 (2013.01); H04L 63/126 (2013.01); H04L 63/1416 (2013.01); H04L 63/1466 (2013.01); H04L 63/1483 (2013.01)] | 8 Claims |

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1. A method of verifying the authenticity of text messages sent from a sender to a recipient, the method comprising the steps of:
Providing a cellular telecom network configured to deliver text messages between texting devices;
Providing a text messaging application on a texting device to both the sender and recipient;
The cellular telecom network and messaging applications configured such that the text messages each have a sender's address, a user-accessible field for receiving content, the content of the user-accessible field being visible to the recipient upon opening the text message in the text message application;
Identifying the receiver for a text message to be sent by the sender;
generating a current sequence marker for the receiver, the current sequence marker representing a next sequence identifier in a sequence of text messages between the sender and the receiver;
inserting the current sequence marker into the user-accessible field of the text message and then sending the text message to the recipient, and
wherein the sender queries a text history to generate the current sequence marker, the text history representing a record of text messages previously sent from the sender to the recipient, the sender then inserting the current sequence marker into the user accessible field before sending the text message.
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