Structural Analysis Methodology

Structural analysis is the mathematical foundation of authentication. It involves measuring the unvarying habits of a signer—habits so ingrained in muscle memory that the signer themselves is unaware of them.

The Golden Ratios

Every writer possesses a unique internal ratio between their ascenders (letters that go above the mean line, like 'l', 'h', 't') and their descenders (letters that go below the baseline, like 'g', 'p', 'y').

* Data aggregated from analysis of 500+ certified exemplars per individual.

Baseline Adherence

Signatures rarely follow a perfectly straight line unless guided. The invisible line upon which the signature rests is the baseline. Forgers attempting to copy a signature often drift upwards or downwards unnaturally, or conversely, create a baseline that is too perfect compared to the known exemplars of the subject.

Common Mistakes in Baseline Analysis

• Ignoring the medium: A signature on a baseball (curved surface) will have a completely different baseline dynamic than one on a flat piece of paper.
• Disregarding context: In-person "rushed" signatures often have severe downward slopes compared to sit-down, controlled signatures.

Frequently Asked Questions