’Hidden signature’ —- a new solution for on-line verification using DTW

The article presents the idea of hidden signature - an artificial signature which can effectively replace the template signature (the best representative of a training set) in signature verification algorithms employing DTW (dynamic time warping). In this paper a few methods for the hidden signature computation are presented with their quality parameters. The main approaches are based on recursive point-by-point averaging and evolutionary algorithms. The hidden signature was tested on the MCYT database, using both genuines and skilled forgeries. The results show that this approach leads to an improvement in verification system parameters.