How to implement a method to watermark text outputs from an LLM for content authenticity verification

Question

With the help of code may i know How to implement a method to watermark text outputs from an LLM for content authenticity verification.

Answer 1

You can implement a watermarking method by subtly embedding token patterns or syntactic cues in the output text for later verification.
Here is the code snippet below:

In the above code we are using the following key points:

• A basic token-based embedding strategy that injects characters from a watermark key.

• Syntactic insertion at fixed intervals to subtly embed a pattern.

• Simple randomness to reduce detectability while maintaining verifiability.

Hence, watermarking LLM outputs enables post-generation validation for authenticity without disrupting naturalness.