In 2002, a theoretical attack, termed the " XSL attack ", was announced by Nicolas Courtois and Josef Pieprzyk, purporting to show a weakness in the AES algorithm due to its simple description .< ref >

Courtois was influenced by the work of Simon and Albert Ando on hierarchical nearly-decomposable systems in economic modelling as a criterion for computer systems design, and in this book he presents the mathematical theory of these nearly-decomposable systems in more detail than Simon and Ando do in their original papers.

He found French art in a stage of transition: the old apprenticeship system was disturbed, and the academic training destined to supplant it was not yet established by Simon Vouet ; but having met Courtois the mathematician, Poussin was fired by the study of his collection of engravings by Marcantonio Raimondi after Italian masters.

It was founded by abbot Courtois ( under the alias Jacques Coeur in 1929.

* The ETAOIN SHRDLU Chess Program was written by Garth Courtois Jr. for the Nova 1200 mini-computer ; competing in the 6th and 7th ACM North American Computer Chess Championship 1975 and 1976.

This adduct was first reported by Bernard Courtois in 1812, and its formula was finally determined in 1905 by Oswald Silberrad.

In 1811, when the Parisian saltpetre manufacturer Bernard Courtois made iodine for the first time from the kelp ash, his discovery was greeted with great interest by experts.

The attack was first published in 2002 by researchers Nicolas Courtois and Josef Pieprzyk.

Jean-Marc Nattier ( March 17, 1685 – November 7, 1766 ), French painter, was born in Paris, the second son of Marc Nattier ( 1642 – 1705 ), a portrait painter, and of Marie Courtois ( 1655 – 1703 ), a miniaturist.

Guillaume Courtois ( 1628 – June 15, 1679 ), called " Il Borgognone ", was a French painter and etcher, the brother of the Jesuit painter Jacques Courtois.

Historian Ján Křen said in interview that when Karel Bartošek and other co-authors found out the book " is heading towards conjectural shallowness, in which communism is reduced to terror only, there was a bad conflict, which couldn't be solved, because agreement was signed and Stephane Courtois pressured them ".

It was later divided into two sections, named after their principal protagonists, Meliadus ( Tristan's father ) and Guiron le Courtois ; these remained popular for hundreds of years, and influenced works written in French as well as in Spanish, Italian, and even Greek.

Bernard Courtois, also spelled Barnard Courtois, ( 12 February 1777 – 27 September 1838 ) was a French chemist born in Dijon, France.

Courtois ' father, Jean-Baptiste, worked for the chemist Louis-Bernard Guyton de Morveau as well as for the Academy as a pharmacist and was called by his family pharmacien de l ' Academie.

When Courtois was twelve the family moved to the Saint-Medard Nitrary, an experimental nitrate plant which Jean-Baptiste bought from Louis-Bernard Guyton de Morveau and his partner.

Courtois lived at Saint-Medard Nitrary until he was about eighteen, when he left his family home to begin his trade apprenticeship in chemistry in Auxerre.

Courtois managed the family business meanwhile until his father was released.

One day towards the end of 1811 while Courtois was isolating sodium and potassium compounds from seaweed ash, he discovered iodine after he added sulfuric acid to the seaweed ash.

The club reached the Première Division in 1954 / 55, under the guidance of manager and former international player Roger Courtois ( 1952 – 1963 ), with players such as Abdelaziz Ben Tifour, Marcel Artelesa or Pierre Flamion.

* Cryptography: A worrying theoretical cryptanalytic attack on the Advanced Encryption Standard ( AES ) has been announced in a paper by Nicolas Courtois and Josef Pieprzyk entitled " Cryptanalysis of Block Ciphers with Overdefined Systems of Equations ".

* Thibaut Courtois Football player, on loan to Atlético de Madrid from Chelsea FC

An XSL attack mounted on this system yields a simpler set of equations which would break AES with complexity of around 2 < sup > 100 </ sup >, if the Courtois and Pieprzyk analysis is correct.

* Courtois ' page on AES

* Courtois and Pieprzyk paper on ePrint

Prince Matthias of Tuscany employed Courtois on some striking works in his villa, Lappeggio, representing with much historical accuracy the princes military exploits.

" Guillaume Courtois died of gout on June 15, 1679.

In 1802, Courtois worked with Armand Séguin at the École Polytechnique on the study of opium.

If, on making this discovery, Courtois had taken out a certificate of invention, he would have realized a large estate.

Other cryptographic results of Courtois include algebraic attacks on stream ciphers, attacks on the KeeLoq and Hitag 2 systems used for remote keyless automobile entry systems, and an analysis of cryptographic weaknesses in public transit smart cards including the London Underground Oyster card and the Dutch OV-chipkaart.

Over the High Altar is an oil painting of the Martyrdom of Saint Andrew ( 1668 ) by French painter Guillaume Courtois, a depiction which shows Andrew tied to the diagonals of the form of the cross on which he was crucified.

La traque de l ’ Affiche rouge, a documentary produced by Denis Peschanski and Jorge Amat, broadcast by France 2 on 15 March 2007, refuted Courtois and Boucault's allegations.

* La traque de l ’ Affiche rouge, a documentary produced by Denis Peschanski and Jorge Amat, broadcast by France 2 on 15 March 2007, refuted Courtois and Boucault's allegations.

Four months earlier, virologists Jack Woodall, D Simpson and others had published initial reports on a virus they called the Congo virus, first isolated in 1956 by physician Ghislaine Courtois, head of the Provincial Medical Laboratory, Stanleyville, Belgian Congo.

Since the late 1990s, Greaves has divided his time between two contrasting bands, an electric trio named Roxongs – the original line-up, with François Ovide on guitar and Manu Denizet on drums, heard on 2001's The Caretaker, has since changed to Jef Morin on guitar and Matthieu Rabaté on drums – and an acoustic trio named Jazzsongs, with Sophia Domancich on piano and Vincent Courtois on cello, which recorded 2003's The Trouble With Happiness, once again a mixture of old and new songs, but this time with Greaves himself singing all the way through.

In the introduction, editor Stéphane Courtois states that "... Communist regimes ... turned mass crime into a full-blown system of government ".

Following the discovery of iodine by Bernard Courtois in 1811, it has been broadly used for the prevention and treatment of skin infections, and the treatment of wounds.

He and his wife, Kuelan, are the parent of actor Ken Higelin, he also has a daughter Izïa Higelin ( singer ) with Aziza and an elder son Arthur H ( famous French singer ) with Nicole Courtois.

By report, he often engaged other artists to paint the figures for him, including Courtois and Filippo Lauri.

Courtois claims that Communist regimes are responsible for a greater number of deaths than any other political ideal or movement, including Nazism.

Strain V3010, isolated by Courtois, was sent to the Rockefeller Foundation Virus Laboratory ( RFVL ) in New York City and found to be identical to another strain from Uganda, but to no other named virus at that time.

The Black Book of Communism: Crimes, Terror, Repression is a book authored by several European academics and edited by Stéphane Courtois, which documents a history of repressions, both political and civilian, by Communist states, including genocides, extrajudicial executions, deportations, and artificial famines.