Efficient cryptographic key stream generation using optimized S-box configurations
US9379887B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2013 |
| Grant date | Jun 28, 2016 |
| Priority date | — |
| Expiry date | Sep 11, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/122
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Application of a ZUC cryptographic functions in wireless communication includes receiving a data stream at the wireless communication apparatus and applying the ZUC cryptographic function to the data stream. The ZUC cryptographic function includes generating at least one multi-byte pseudo-random number that provides an index to one of a plurality of substitution boxes. Each of the substitution boxes is further based on one or more normative substitution boxes. The ZUC cryptographic function further includes retrieving a value from each of the substitution boxes using each byte of the multi-byte pseudo-random number, assembling the retrieved values into at least one substituted values, and generating at least one key value based on the substituted values, wherein the key value is used in applying the ZUC cryptographic function to the data stream. The method also includes processing the data stream after application of the ZUC cryptographic function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.