Methods and apparatus to support reliable digital communications without integrity metadata

A data processing system with technology to enable implicit integrity to be used for digital communications, the data processing system comprising:

• a hardware processor;
• and
• an implicit integrity engine responsive to the processor, wherein the implicit integrity engine enables the data processing system to operate as a source device and perform operations comprising:
• automatically using a pattern matching algorithm to analyze entropy characteristics of a plaintext version of a message, wherein the pattern matching algorithm uses at least one pattern matching test to generate at least one entropy metric for the message;
• automatically determining whether the message has low entropy, based on results of the pattern matching algorithm and a predetermined entropy threshold;
• in response to a determination that the message does not have the low entropy, automatically generating cyphertext based on the message, generating integrity metadata based on the cyphertext, and sending the cyphertext and the integrity metadata to a destination device;
• and
• in response to a determination that the message has the low entropy, encrypting the message and sending the encrypted message to the destination device without sending any integrity metadata for the message to the destination device.