True random number generator with digital post-processing circuit

Abstract

The invention discloses a true random number generator with a digital post-processing circuit, which comprises a true random number source and a true random number output register. The true random number generator is characterized in that the digital post-processing circuit is connected between the true random number source and the true random number output register, wherein the digital post-processing circuit comprises a Manchester encoder, a linear feedback shift register and a DES (data encryption standard) encryption unit which are connected from the true random number source to the true random number output register; the true random number output register is used for latching the ciphertext output by the DES encryption unit; and finally, the true random number is output to a chip by the true random number output register. The true random number generator improves the quality of random number sequences generated by the true random number source; the finally output random number sequences have the characteristics of good uniformity and high independence; the security for information storage of the cryptographic chip is improved; and the true random number generator has higher actual application value in the aspects of cryptographic chip, information security and the like.

Description

technical field [0001] The invention relates to a true random number generator, in particular to a true random number generator with a digital post-processing circuit. Background technique [0002] Random numbers play an important role in cryptography. Almost all cryptographic algorithms and protocols use some data that must be secret to the attacker. For example, for a cryptographic algorithm, if the secret is stored in the key , then the key is the secret, including the key of the symmetric encryption algorithm (DES, AES, etc.) and the key pair of the asymmetric encryption algorithm (RSA, DSA, etc.), and these keys must be random numbers. For the only proven perfect security system one-time pad system, its security depends on the key, which must be a random number. [0003] With the development of encryption and decryption technology, the requirements for high-quality random numbers are also increasing. The random number generator implemented by the software method is to...

AI Technical Summary

Problems solved by technology

Although the physical random source can provide a true random number sequence in the true sense, it does not mean that the true random number sequence generated by it is of high quality, nor can it necessarily meet the requirements of the above tests

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