4 results about "Pseudo random number generation" patented technology

A method of generating at least one encryption key (130) for encrypting data (142), a method of data transmission between at least two communication systems (136, 138), a method of encrypting data (142) and a method of decrypting encrypted data (144) are disclosed. Further disclosed are an encryption key generating device (110), a system (134), a data encryption system (148) and a data decryption system (150). The method of generating at least one encryption key (130) for encrypting data (142), specifically for data transmission over an insecure channel, comprises:blending at least two materials (114) according to at least one item of blending information by using a blending device (112), thereby generating at least one blend (120);ii. detecting at least one material property (124) of the blend (120) by using at least one detector (126); andiii. transforming the material property (124) into the encryption key (130) by using at least one data processing device (132) configured for applying at least one transformation algorithm to the material property (124).

This specification provides a pseudo-random number generation method and apparatus. The method includes: multiple iterations corresponding to the count value of a counter, wherein any t-th iteration includes: obtaining the seed output from the previous round as the current seed; processing the current seed and a first value using a symmetric encryption algorithm to obtain a random number for the current round, wherein the first value is determined based on the current count value of the counter and a preset first constant; processing the current seed and a second value using the symmetric encryption algorithm to obtain the seed for the next round of iteration, wherein the second value is determined based on the current count value and a preset second constant. It features high performance and side-channel security.

Systems and techniques for providing pseudorandom number generation include generating a pseudorandom number based on a bitwise exclusive-OR, or XOR, function that compares a shifted version of an input seed with one of a plurality of values, where one of the values is selected based on whether a first bit of the input seed is set or unset. An initial seed value is stored in hardware or generated based on an unknown value stored in memory, and successive outputs of the pseudorandom number generation are used as seeds in subsequent pseudorandom number generation operations.

This invention relates to the field of switching power supply control technology, and discloses a method and circuit for dual random frequency dithering and adaptive slope compensation in switching power supplies. The method generates a dual-layer independent random sequence based on pseudo-random numbers, and generates a slow random triangular wave frequency dithering signal and a fast random jump frequency dithering signal through layered mapping. The switching cycle duration is obtained through cycle counting and numerical conversion, and the target duty cycle is calculated by combining the input voltage and output voltage reference values. Using the target duty cycle, switching cycle, and system parameters, an adaptive compensation slope value is calculated through a lookup table combined with interpolation or formulas. A digital compensation slope is generated based on the smoothed compensation slope and the cycle synchronization signal. This slope is digitally added to and compared with the inductor current sampling signal to achieve stable LED drive current output. This invention maintains stable output current while effectively suppressing broadband electromagnetic interference, and is suitable for high-reliability applications such as automotive LED drives.