Key generation method based on position uniqueness information

Abstract

The invention provides a key generation method based on position uniqueness information, which is improved on the basis of a hash function, and when the hash function fills input information, a chaotic sequence is introduced, an MD buffer area is initialized, and messages are processed by taking groups as units. The information filled each time can be randomly changed along with the change of the input positioning information, so that the defect that a hash function is easily attacked by a dictionary is effectively avoided; meanwhile, a plurality of control parameters are introduced, the change space of a key is increased, and the security of a key generation algorithm and the randomness of the generated key are improved; according to the method, the structure of the MD5 algorithm is not changed too much, so that the properties of irreversibility, initial value sensitivity and the like of the original MD5 algorithm still exist, the complexity of the improved algorithm is not obviously improved, and the operation time is relatively short.

Description

technical field [0001] The invention belongs to the field of keys, and in particular relates to a key generation method based on location uniqueness information. Background technique [0002] Communication security is related to many aspects such as military defense, national economic lifeline, society and personal privacy, and is particularly important in today's information society. The existing mature security mechanism is cryptography based on computing systems. However, with the development of science and technology and the increase of communication equipment, some disadvantages of traditional cryptography are gradually emerging. For example, the cost of decrypting keys is getting lower and lower. Access devices make key distribution and management particularly difficult. However, research in fields such as quantum security and physical layer security is still in its infancy and immature. For the future air-space-ground communication network, the communication securit...

AI Technical Summary

Problems solved by technology

The existing mature security mechanism is cryptography based on computing systems. However, with the development of science and technology and the increase of communication equipment, some disadvantages of traditional cryptography are gradually emerging. For example, the cost of decrypting keys is getting lower and lower. Access devices make key distribution and management particularly difficult, etc.

However, research in fields such as quantum security and physical layer security is still in its infancy and immature.

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