David Naccache is a cryptographer, currently a professor at the

École normale supérieure École may refer to: * an elementary school in the French educational stages normally followed by secondary education Secondary education or post-primary education covers two phases on the International Standard Classification of Education sca ...

and a member of its Computer Laboratory. He was previously a professor at Panthéon-Assas University.

Biography

He received his Ph.D. in 1995 from the École nationale supérieure des télécommunications. Naccache's most notable work is in

public-key cryptography Public-key cryptography, or asymmetric cryptography, is the field of cryptographic systems that use pairs of related keys. Each key pair consists of a public key and a corresponding private key. Key pairs are generated with cryptographic a ...

, including the cryptanalysis of

digital signature A digital signature is a mathematical scheme for verifying the authenticity of digital messages or documents. A valid digital signature, where the prerequisites are satisfied, gives a recipient very high confidence that the message was created b ...

schemes. Together with

Jacques Stern Jacques Stern (born 21 August 1949) is a cryptographer, currently a professor at the École Normale Supérieure. He received the 2006 CNRS Gold medal. His notable work includes the cryptanalysis of numerous encryption and signature schemes, t ...

he designed the similarly named but very distinct Naccache-Stern cryptosystem and Naccache-Stern knapsack cryptosystem. In 2004 David Naccache and

Claire Whelan Clair or Claire may refer to: *Claire (given name), a list of people with the name Claire *Clair (surname) Places Canada * Clair, New Brunswick, a former village, now part of Haut-Madawaska * Clair Parish, New Brunswick * Pointe-Claire, Que ...

, then employed by Gemplus International, used

image processing An image is a visual representation of something. It can be two-dimensional, three-dimensional, or somehow otherwise feed into the visual system to convey information. An image can be an artifact, such as a photograph or other two-dimension ...

techniques to uncover redacted information from the declassified 6 August 2001

President's Daily Brief The President's Daily Brief (PDB), sometimes referred to as the President's Daily Briefing or the President's Daily Bulletin, is a top-secret document produced and given each morning to the president of the United States; it is also distribute ...

Bin Ladin Determined To Strike in US Bin Ladin Determined To Strike in US was the title of the President's Daily Brief prepared by the Central Intelligence Agency and given to U.S. President George W. Bush on Monday, August 6, 2001. The brief warned, 36 days before the September 1 ...

''. They also demonstrated how the same process could be applied to other redacted documents. Naccache is also a

visiting professor In academia, a visiting scholar, visiting researcher, visiting fellow, visiting lecturer, or visiting professor is a scholar from an institution who visits a host university to teach, lecture, or perform research on a topic for which the visitor ...

and

researcher Research is "creative and systematic work undertaken to increase the stock of knowledge". It involves the collection, organization and analysis of evidence to increase understanding of a topic, characterized by a particular attentiveness t ...

at the Information Security Group of

Royal Holloway, University of London Royal Holloway, University of London (RHUL), formally incorporated as Royal Holloway and Bedford New College, is a public university, public research university and a constituent college of the federal University of London. It has six schools, ...

. In 2021, two epidemiologists denounced David Naccache to the management of the

. 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.

Awards

In 2020 Naccache was listed as a Fellow of the IACR, the

International Association for Cryptologic Research International is an adjective (also used as a noun) meaning "between nations". International may also refer to: Music Albums * ''International'' (Kevin Michael album), 2011 * ''International'' (New Order album), 2002 * ''International'' (The T ...

, "for significant contributions to applied cryptography in industry and academia, and for the service to the IACR

References

External links

David Naccache's personal page
. Living people Modern cryptographers Public-key cryptographers French cryptographers Paris 2 Panthéon-Assas University faculty Year of birth missing (living people) École Normale Supérieure faculty {{crypto-bio-stub