122 results about "Random response" patented technology

Methods and apparatus to optimize delivery of multicast content using probabilistic feedback. A method is provided for transmitting data from a server to a plurality of receiving terminals. The method includes transmitting the data from the server to the plurality of receiving terminals, and generating a random response value at each receiving terminal. The method also includes comparing the response value to an acknowledgement value at each receiving terminal, and transmitting an acknowledgment signal to the server from selected receiving terminals. The selected receiving terminals are a portion of the plurality of receiving terminals where the response value has a selected relationship to the acknowledgement value.

The invention discloses a physical unclonable function based on reconfigurable ring oscillators and a generation method of the physical unclonable function based on the reconfigurable ring oscillators. The physical unclonable function comprises a reconfigurable ring oscillator matrix, a mapping module and a control module. The reconfigurable ring oscillator matrix is formed by reconfigurable bit generators, wherein the number of the bit generators in the matrix is determined according to the requirement in practical application. Each reconfigurable bit generator is formed by a reconfigurable oscillation loop, a counter, a register and a comparator. The reconfigurable ring oscillator matrix can extract random differences introduced between gate circuits in the manufacturing and machining processes and can generate random response signals. The mapping module has the function of generating a pair of configuration signals corresponding to each excitation signal for each excitation signal. The control module controls and coordinates work of the mapping module and work of the configurable ring oscillator matrix. Compared with a physical unclonable function based on the traditional ring oscillators, hardware implementation cost is greatly reduced, and the physical unclonable function has wider application prospects in safety fields such as the encryption authentication field.