An algorithm Italian repairing a flaw browsers: purchases and online games safer
It will serve to fix a bug found in the JavaScript in the creation of numbers pseudocausali, was adopted by Chrome, Firefox and Safari
An algorithm invented by an Italian mathematician will be installed on computers, tablets and smartphones worldwide. To the resolution a “bug” emerged in JavaScript, in the creation of “numbers pseudocausali,” used for online purchases and video games. The new algorithm xorshift128 + was developed by the mathematician Sebastiano Vigna University of Milan and has been adopted by major browsers, such as Chrome, Firefox and Safari.
It is installed on electronic devices allow you to fix a problem in JavaScript, the language used by all web pages to create dynamic effects at the base of the so-called Web 2.0′. The fault belongs to an important feature, the pseudorandom number generation, required for example to identify transactions in online shopping or to introduce randomness in video games (think extraction of lottery tickets or distributing the cards in online poker) .
“Generate random numbers is difficult and very expensive,” says Vigna. “Therefore since the forties have developed algorithms to calculate numbers in a deterministic way, mimicking the randomness that can be achieved only with physical processes (such as throwing a dice), but it would be too expensive to reproduce on a large scale to generate the millions of random bits per second of which is needed on the web. ”
Until last month, the sequences of pseudorandom numbers provided by the popular browsers (Chrome, Safari and Firefox) were based on an algorithm that could create serious problems found in a clear manner “when JavaScript is used for server management, “says Vigna.
The most serious flaw was discovered by a start-up that deals with online gambling. “Using JavaScript to manage the site, have shown that the algorithm extracted similar numbers more often than might be expected, threatening to identify two different bets with the same sequence of numbers.”
The problem has been completely solved by Sebastiano Vigna with the new algorithm xorshift128 +, whose code will be installed and run on the vast majority of existing terminals (phones, tablets and PCs).
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//
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//
// ———————————————— -
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