Key refreshing system and method in quantum secret communication system

Abstract

The invention discloses a secret key refreshing system and method in a quantum secret communication system, the system comprises a first quantum communication service station, a second quantum communication service station and quantum secret communication clients, and the quantum secret communication clients comprise a common client and a secret key refreshing client. Near field communication can be carried out between the common user side and the key refreshing user side, the common user side is equipped with a common quantum key card, and the key refreshing user side is equipped with a key refreshing quantum key card. The method has the beneficial effects that a new symmetric key pool can be calculated according to the key refreshing parameter by combining the symmetric key pool and the key refreshing parameter obtained from the key refreshing user side, so that under the extreme condition that the symmetric key pool in a certain quantum key card is cracked, the key refreshing parameter cannot be obtained by an enemy, and the key refreshing parameter cannot be obtained by the enemy; and the key pool of the quantum key card for backup cannot be cracked.

Description

technical field [0001] The invention relates to the field of quantum secure communication, in particular to a key refresh system and method in a quantum secure communication system. Background technique [0002] The trend of economic globalization has become unstoppable. Tens of billions of information flow out on the Internet, just like humans have built a virtualized world in storage devices, where privacy and knowledge are concentrated. And this information, like resources in the real world, has intangible value. [0003] At present, in addition to hackers who may steal your information, existing messaging vendors can also check your communication information at any time. Therefore, for individuals or organizations, in order to ensure that their information is not stolen, they must hold the key in their own hands to ensure the security of their own information, which is crucial to key management. Traditional encryption methods mainly rely on asymmetric cryptosystems. T...

AI Technical Summary

Problems solved by technology

[0008] 2. In the existing technology, after the symmetric key pool has been used for many times, the used keys are no longer used, resulting in a continuous decrease in the number of keys in the key pool

It can be seen that key supplementation is inconvenient for users

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