Entropy storage ring having stages with feedback inputs
US9092284B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 25, 2013 |
| Grant date | Jul 28, 2015 |
| Priority date | — |
| Expiry date | Jan 22, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F7/58
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An entropy storage ring includes an input node, a plurality of serial-connected stages, and an output node. Each stage includes an XOR (or XNOR) circuit, a delay element having an input coupled to the XOR output, and a combinatorial circuit having an output coupled to a second input of the XOR. The combinatorial circuit may be a NAND, NOR, AND or OR gate. A first input of the XOR is the data input of the stage. The output of the delay element is the data output of the stage. A first input of the combinatorial circuit is coupled to receive an enable bit from a configuration register. A second input of the combinatorial circuit is coupled to the ring output node. In operation, a bit stream is supplied onto the ring input node. Feedback of multiple stages are enabled so that the bit stream undergoes complex permutation as it circulates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.