A signature discriminator is a tool used to identify differences between two sets of signatures. This can be useful in many scenarios, such as in forensic investigations where the authenticity of a document or a signature needs to be verified. Some common synonyms for signature discriminator include signature verification system, signature comparison tool, signature analysis software, signature recognition technology, and signature validation program. Each of these tools focuses on identifying unique features within a handwritten or digital signature to discriminate it from other signatures. They use various techniques, such as machine learning, mathematical algorithms, and image processing to identify patterns and similarities within the signatures, helping to establish authenticity and identify potential forgeries.