Distributed key caching for encrypted keys
US11700112B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2020 |
| Grant date | Jul 11, 2023 |
| Priority date | — |
| Expiry date | Apr 30, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/62
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods, systems, and devices for distributed caching of encrypted encryption keys are described. Some multi-tenant database systems may support encryption of data records. To efficiently handle multiple encryption keys across multiple application servers, the database system may store the encryption keys in a distributed cache accessible by each of the application servers. To securely cache the encryption keys, the database system may encrypt (e.g., wrap) each data encryption key (DEK) using a second encryption key (e.g., a key encryption key (KEK)). The database system may store the DEKs and KEKs in separate caches to further protect the encryption keys. For example, while the encrypted DEKs may be stored in the distributed cache, the KEKs may be stored locally on application servers. The database system may further support “bring your own key” (BYOK) functionality, where a user may upload a tenant secret or tenant-specific encryption key to the database.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.