2results about How to "Large sampling range" patented technology

This invention discloses a key exchange method, apparatus, and storage medium based on a modular lattice. The key exchange method includes: Party A generating a random number seed, obtaining a compressed public key, and sending it to Party B; Party B using the random number seed to obtain the compressed public key; recovering data from the received compressed public key from Party A and calculating a temporary key; processing the temporary key using a segmented signal function to obtain a signal value; using the signal value to coordinate the temporary key to obtain a shared temporary key, thereby generating a verification tag and deriving the final key; Party A recovering data from the received compressed public key from Party B, recalculating the verification tag, and comparing them; only when a match is successful, the final key is derived using the same method. This ensures the randomness of the data and the ability to detect tampering with the data received by Party A, thus achieving higher security. This invention significantly reduces the failure probability while improving security.

The application discloses a current sampling device and an energy storage power supply. The current sampling device comprises an amplification circuit, a resistance shunt circuit, a switching circuit and a control circuit. The resistance shunt circuit is connected with the amplification circuit and comprises a first resistance and a second resistance connected in series. The switching circuit is connected between the resistance shunt circuit and the amplification circuit. The control circuit is connected with the amplification circuit and the switching circuit, and sends a control signal based on the size of the current collected by the current sampling device. The switching circuit responds to the control signal to turn on or turn off the electrical connection between the resistance shunt circuit and the amplification circuit. The switching circuit switches the resistance of the resistance shunt circuit according to the size of the current. In the case of small current, the resistance shunt circuit with a larger resistance is switched to improve the small current sampling accuracy. In the case of large current, the resistance shunt circuit with a smaller resistance is switched to expand the current sampling range.