David Naccache

David Naccache is a cryptographer, currently a professor at the École normale supérieure and a member of its Computer Laboratory.

Naccache's most notable work is in public-key cryptography, including the cryptanalysis of digital signature schemes.

In 2004 David Naccache and Claire Whelan, then employed by Gemplus International, used image processing techniques to uncover redacted information from the declassified 6 August 2001 President's Daily Brief Bin Ladin Determined To Strike in US.

[1] Naccache is also a visiting professor and researcher at the Information Security Group of Royal Holloway, University of London.

They accused him of having produced a fraudulent report in November 2018 for Genevrier Laboratories in exchange for a large payment (more than €250,000) in defence of a delisted drug, Chondrosulf.