According to teacher estimates, 20% of assignments are copied and pasted from other sources. Anti-plagiarism charters should be systematically signed by both universities and students, but nothing can beat the eagle eye of the lecturer.

Students, lecturers: who are the plagiarists? Has the Internet revolutionized cheating? How can we combat this phenomenon, which over the last five years has taken on exponential dimensions.

The plagiarism is more and more spread in universities. In cause, Internet. To overcome this phenomenon, the catholic university of Louvain makes sensitive and tests a detector software of plagiarism. Every work or report is scanned by the software. Green light, the work is "sane". Red light, similarities with accessible documents on the Web or in the works of other students exist and the teacher will have to establish the scale of the plagiarism.

An investigation published by Nature, reveals that a scientific plagiarism has course among researchers too. Two researchers from South-western Medical Centre of the University of Texas, Mounir Errami and Harold Garner, auscultated an American medical documentation base, Medline, where summaries of 17 million articles published in more than 5,000 reviews from some 80 countries are indexed. They screened it through an engine search, eTBLAST, which is able to locate the "similarities". While focusing on the most quoted 7 million articles, they located a little more than 70,000 cases of "high resemblance". That which, taking into account the limits of the software, makes them estimate the number of plagiarisms at more than 200,000, out of the 17 million referred articles.

The ministry of Higher education and research entrusted to the national Centre of scientific research (CNRS) a mission on scientific integrity. Scientific fraud is varied: biased manufacturing or forgery of results, biased interpretation or selection of data, alteration of curves or images, plagiarism, theft of ideas, financial profit-sharing's ... The increasing pressure which practices on the researchers (among which the career and the credits depend strictly on the quantity of articles and on produced results) tend to multiply the fraudulent practices.