![]() ![]() Data integrity checks let you ensure that third parties did not modify any content of your MQTT messages. It is important to check the integrity of messages that are sent to the broker from untrusted MQTT clients or MQTT clients that you don’t control (especially if you don’t use TLS). How do you check data integrity for MQTT messages? ![]() Note: While technically not 100% correct, to keep things simple, we use the word stamp to refer to digital signatures, MACs, and checksums in this blog post. To get the most out of this post, we recommend that you read about MQTT payload encryption first. Find out how digital signatures/MACs, and checksums for MQTT messages work and what problems they solve. Our topic this week is signing MQTT messages. Welcome to the ninth part of the MQTT Security Fundamentals series. ![]()
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