Model Lineage Analysis: Determination and Closeness Measurement

Summary

This paper reformulates model lineage determination as a question of whether two models' parameters lie within the same local optimum of the loss landscape. The authors propose a method for lineage determination and a task-agnostic, modification-type-agnostic way to measure lineage closeness, based on the mean adversarial distance from data points to decision boundaries and the matching rate of predictions. Experiments report 100% accuracy in lineage determination across a wide range of modification scenarios.