True random number generator

Abstract

The invention provides a true random number generator, which comprises a light transmitting secondary module, at least one light receiving secondary module, a clock source, an attenuator and a sampling device, wherein the clock source sends clock signals to the light transmitting secondary module and the sampling device; the light transmitting secondary module transmits light signals according tothe clock signals; the light receiving secondary module receives the light signals, and the light power received by the light receiving secondary module is less than or equal to the detection sensitivity of the light receiving secondary module; the sampling device samples output signals of the light receiving secondary module according to the clock signals of the clock source and a predetermined threshold value. The quality of random numbers generated by the true random number generator is not influenced by environment; the true random number generator has the advantages of strong anti-jammingcapacity, high generation rate and low cost, and also can adopt a plurality of light receiving secondary modules to work in parallel so as to acquire doubled random number output; and the true randomnumber generator also can adopt a TTL standard level as an authentication amplitude so as to leave out sampling and comparing circuits for noise signals and greatly simplify the circuit structure.

Description

technical field [0001] The invention relates to a true random number generator, in particular to a high-speed true random number generator for generating keys of cryptographic algorithms and various ciphers. Background technique [0002] In the current market, high-quality random numbers are of great significance in the field of information security. They are directly used in encryption and decryption, identity authentication, digital signatures and other fields. In addition, commercial lottery and gambling machines also need random numbers to achieve Unpredictability. Taking the encryption algorithm in the field of information security as an example, it is essentially a random number generator to generate a random key sequence, and then use this key sequence to encrypt plaintext information through certain operations. Therefore, the quality of random numbers directly affects the security of information. If the quality of the random number is not high, it exhibits a certai...

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Problems solved by technology

Because the physical noise source is easily affected by environmental factors such as temperature and pressure, the anti-interference ability is relatively poor, and the uniformity and stability of the random sequence generated by it are difficult to control

Chinese Patent Application No. 200410091373.0 "A Method and Device for Generating True Random Numbers" uses the random distribution of time gaps between photons of strongly attenuated laser pulses to extract true random numbers. This method requires the use of expensive single-photon detectors , the whole system is more complex, not easy to integrate and use, and the rate of random number generation is slow because it is limited by the rate of single photon detectors

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