Key Generation Method Based on Location Uniqueness Information

Abstract

The invention proposes a key generation method based on location uniqueness information, which is improved on the basis of the hash function. When the hash function fills the input information, a chaotic sequence is introduced to initialize the MD buffer. The message is processed in groups to ensure that the information filled each time will change randomly with the change of the input positioning information, which effectively avoids the disadvantage that the hash function is vulnerable to dictionary attacks. The change space of the key is enlarged, and the security of the key generation algorithm and the randomness of the generated key are improved; the present invention does not change the structure of the MD5 algorithm too much, so the original MD5 algorithm has irreversibility and initial value sensitivity. Equal properties still exist, and the improved algorithm has no significant increase in complexity and relatively short running time.

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 military and national defense, the lifeline of the national economy, society and personal privacy, and is particularly important in today's information society. The existing mature encryption mechanism is based on the cryptography of the computing system, but with the development of science and technology and the increase of communication equipment, some disadvantages of traditional cryptography have gradually emerged. access equipment makes key distribution and management particularly difficult. However, research in areas 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 security threats brought by the characteristics of large coverag...

Images