Laser system generates random numbers at ultra high speed

The random number generation system is developed by researchers from Nanyang Technological

University of Singapore (NTU Singapore), Yale University, Trinity College Dublin and manufactured at NTU.

Random numbers are used for various purposes,such as the creation of data encryption keys and one-time passwords in daily processes (online banking and e-commerce) to ensure their security.

The new system uses a laser with a specialan hourglass-shaped cavity to generate patterns that are formed by light beams reflecting and interacting with each other within the cavity. By reading the templates, the system generates many series of random numbers at the same time.

Keely that like snowflakes, no two numericalthe sequences generated by the system were not the same due to the unpredictable nature of the reflection and interaction of light rays with each other in the cavity.

The laser used in the system has a length of aboutone millimeter. This is much less than most other lasers. It is also energy efficient and can work with any household outlet. It requires a current of only one ampere (1 A).

The files illustrate the laser structure,space-time interference of generation modes for generating random intensity fluctuations for parallel generation of random numbers. Credit: Kyungduk Kim

The laser system generates about 250 TBrandom bits per second - a hundred times faster than modern computer generators. At this speed, the system only takes about 12 seconds to generate a collection of random numbers equivalent to the size of the information in the world's largest library, the US Library of Congress. By the way, its fund exceeds 155 million copies of books in 470 languages.

In his study published in the journal Science, scientists have confirmed the effectiveness of theira random number generator. They proved that the generator created by NTU is faster and safer than existing comparable technologies. It will help protect user data in a world that increasingly uses online transactions.

Scientists are preparing to make the technology ready for practical use by incorporating a laser into a compact chip. It will generate random numbers that can be entered directly into the computer.

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