52 results about "Chaotic synchronization" patented technology

The invention belongs to the technical field of secret optical communication, and particularly relates to a long-distance secret key distribution system based on chaos synchronization, which solves the technical problems in the background technology, and comprises a one-drive-two communication structure consisting of a drive part and two communication parties, or a two-drive-two communication structure consisting of two drive parts and two communication parties which are respectively connected. A digital optical signal is used as a driving signal, the synchronization state of a laser output signal is responded through phase regulation of keying injection light, in the process, the digital signal is used as the driving signal for long-distance transmission, the influence of noise in a link on the digital signal is low, the synchronization quality is improved, the key distribution distance is increased, and the key distribution efficiency is improved. The method can be used for long-distance transmission, and the long-distance synchronization quality is improved.

The invention belongs to the technical field of secure optical communication, specifically a long-distance key distribution system based on chaos synchronization, which solves the technical problems in the background technology, and includes a "one drive two" communication structure composed of a driving part and two communication parties , or a "two-drive-two" communication structure composed of two drive parts and two communication parties respectively connected. The invention uses the digital optical signal as the driving signal, and responds to the synchronous state of the laser output signal by keying the phase regulation of the injected light. During this process, the digital signal is used as the driving signal for long-distance transmission, and the digital signal is less affected by the noise in the link. The synchronization quality is improved, thereby increasing the key distribution distance, which can be used for longer-distance transmission and improves the quality of long-distance synchronization.

The invention discloses a chaos synchronization encrypting / decrypting method and device using data compression encoding. The device comprises a random number generator, a public key cryptography encipher, a public key cryptography decipher, a dynamical probability counter, an entropy encoder and an entropy decoder. The method comprises the steps of taking the entropy encoder and the dynamical probability counter used for the data compression as a chaotic dynamics system; enabling a compression coding process to form a chaotic cryptology encryption process; combining the public key cryptography encipher with the chaotic dynamics system, wherein after a randomly generated session key is encrypted in an asymmetrical encryption manner by a sender, the session key is sent to a receiver; initializing the respective chaotic dynamics system through the respective session key the sender and the receiver so that the system states of the sender and the receiver are synchronous; carrying out data compression encoding through the initialized system by the sender; and carrying out data uncompressing through a system with consistent state by the receiver. The method and the device provided by the invention support overlong session key and improve the encryption safety; and simultaneously, the encryption speed is not affected by the key length.

The invention relates to a method and a system for laser chaotic synchronization and security communication based on reserve pool calculation, belonging to the technical field of laser chaos synchronization and security communication; ; The technical solution adopted to solve the above technical problems is: the third-party driving laser adopts the optical feedback method to generate chaotic laser, which is divided into two channels as the driving signal and output to the phase modulator and the ADC module respectively; the main laser adopts the chaotic phase modulation optical feedback method The chaotic carrier wave is generated, which is divided into two outputs, and one channel is transmitted to the reserve pool calculation module of the receiving end; the other channel of chaotic encrypted signal generated by superimposing the original information is transmitted to the receiving end through the optical fiber loop; the chaotic data after the ADC module is used as the reserve pool calculation. The input of the module, the training reserve pool makes the reserve pool calculation module synchronize with the main laser; the invention applies to secure communication.