Proof-of-work key wrapping with individual key fragments
US11411728B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2019 |
| Grant date | Aug 9, 2022 |
| Priority date | — |
| Expiry date | Mar 19, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/088
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The technology disclosed herein provides a proof-of-work key wrapping system that uses key fragments to cryptographically control access to data. An example method may include: encrypting a first cryptographic key to produce a wrapped key, wherein the first cryptographic key enables a computing device to access content; splitting a second cryptographic key into a plurality of key fragments, wherein the second cryptographic key is for decrypting the wrapped key; selecting a set of cryptographic attributes for deriving at least one of the plurality of key fragments, wherein the set of cryptographic attributes are selected in view of a characteristic of the computing device; and providing the wrapped key and the set of cryptographic attributes to the computing device, the set of cryptographic attributes facilitating determination of the second cryptographic key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.