Asymmetric cryptographic terminal based on quantum random number, communication system and method

Abstract

The invention discloses an asymmetric cryptographic terminal based on a quantum random number, a communication system comprising a plurality of asymmetric cryptographic terminals, and a secret communication method for performing secret communication by using the asymmetric cryptographic terminals. The cryptographic terminal comprises a quantum random number generator and a key generator, wherein the quantum random number generator is used for generating and outputting two quantum random numbers; the key generator is used for firstly segmenting and truncating the two quantum random numbers intotwo groups of random number sequences with the same length, and then converting the two groups of random number sequences into a group of private keys and a group of public keys which are paired witheach other by using a private key algorithm and a public key algorithm respectively; and the asymmetric cryptographic terminal performs encryption, decryption, signature and signature verification according to the private key and the public key which are paired with each other. The password terminal is simple in algorithm and high in secret key updating frequency, and digital signature service and data encryption and decryption service can be provided at the same time in the communication process.

Description

technical field [0001] The present invention relates to communication encryption technology, to an asymmetric cryptographic terminal based on quantum random numbers, to a communication system including a plurality of such asymmetric cryptographic terminals, and to a method of using the asymmetric cryptographic terminal for secure communication method of secure communication. Background technique [0002] The current secure communication technology, one is the encryption technology based on the classical symmetric or asymmetric cryptographic system, and the other is the quantum secure communication technology based on the distribution key of the quantum state that has emerged in recent years. [0003] (1) Symmetric cryptosystem is a traditional cryptosystem, also known as private key cryptosystem. In a symmetric encryption system, the same key is used for encryption and decryption. Because the encryption / decryption key is the same, the two parties that need to communicate m...

AI Technical Summary

Problems solved by technology

Although symmetric encryption has some good features, it also has obvious defects: ①Key distribution problem: To carry out encrypted communication, the two parties need to negotiate the encryption key through a secret secure channel, and this secret secure channel It may be difficult to realize; ② Key management problem: In a network with n users, any two users need to have a shared key. When the number of users in the network (ie n) is large, it needs to be managed The number of keys is very large, which is n(n-1) / 2; ③ does not have the digital signature function: when the subject A receives the electronic data of the subject B, it cannot prove to the third party that the electronic document is indeed from B

The disadvantages are: large key size, slow encryption / decryption speed, short development history, etc.

[0010] However, there are still many disadvantages in the QKD system: ①The keys distributed through negotiation at both ends of the QKD system are the same key, so the system itself still does not have the digital signature function; ②A complete QKD system must consist of a pair of QKDs, two QKS , one QKMC, two QVPNs, at least two switches and at least one bare fiber

It can be seen that the system is relatively complicated, at least not as convenient as mainstream cipher machines in terms of use; ③QKD technology has only gradually matured in recent years, and has not yet undergone strict tests in the market. The traditional asymmetric cryptosystem is short

The marketization rate of technology is low, and there is basically no commercial use. In addition, the key components of QKD equipment still have to be imported, and the service life is short, so the production cost of QKD equipment remains high; ④The current QKD equipment is actually a terminal product, but it is different from traditional communication Compared with the terminal equipment, there are some shortcomings such as bulky size, complex equipment structure, poor working stability, and harsh use requirements.

Moreover, traditional communication equipment has already adapted to the development needs of modern communication networks, and has developed a comprehensive and multi-series product system covering three levels: access, aggregation, and core, while QKD equipment can only be regarded as at the access level in terms of its shape. In such an initial stage of development, limited by technical conditions, it is impossible to develop a product system that truly belongs to the convergence or even the core level. Therefore, there is still a large generation gap between it and the development of traditional communication equipment, and it cannot meet the development needs of modern communication networks.

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