Questo mi pare importante: algoritmi di riconoscimento biometrico devono tener conto del mutamento progressivo del volto, ma questa feature può essere usata per una sostituzione d'identità. Poisoning adaptive biometric systems Battista Biggio, Giorgio Fumera, Fabio Roli, and Luca Didaci Department of Electrical and Electronic Engineering, University of Cagliari Adaptive biometric recognition systems have been proposed to deal with natural changes of the clients’ biometric traits due to mul- tiple factors, like aging. However, their adaptability to changes may be exploited by an attacker to compromise the stored templates, either to impersonate a specific client, or to deny access to him. In this paper we show how a carefully designed attack may gradually poison the template gallery of some users, and successfully mislead a simple PCA-based face verification system that performs self-update. <https://pralab.diee.unica.it/sites/default/files/biggio12-spr.pdf> Via - Harvard Business review. "Your Algorithms Are Not Safe from Hackers" <https://hbr.org/2016/01/your-algorithms-are-not-safe-from-hackers> Buon 2016! Alberto