Apparatus to cryptographically provide a digital output signal as a response to a challenge
US12047489B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2021 |
| Grant date | Jul 23, 2024 |
| Priority date | — |
| Expiry date | Sep 20, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/16
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An apparatus configured to: receive a digital input signal; receive a processing-direction-signal that can have a forward-value or a backward-value; and provide a digital output signal. The apparatus comprising a processor configured to apply an involutional cryptographic function to the digital input signal by: for a first operation: apply a first step of the involutional cryptographic function to the digital input signal in order to implement a forward calculation to move to the next step in the sequence; and perform a plurality of further operations until the forward calculation of a last step is performed. Each further operation comprises: if the processing-direction-signal has a forward-value: then perform the forward calculation for the current step; or if the processing-direction-signal has a backward-value: then perform a backward calculation for the current step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.