To Hash or Not to Hash Again? (In)differentiability Results for H^2 and HMAC

Yevgeniy Dodis, Thomas Ristenpart, John P. Steinberger, Stefano Tessaro. To Hash or Not to Hash Again? (In)differentiability Results for H^2 and HMAC. IACR Cryptology ePrint Archive, 2013:382, 2013. [doi]

Abstract

Abstract is missing.