Consistent ciphertext creation
US11265144B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2020 |
| Grant date | Mar 1, 2022 |
| Priority date | — |
| Expiry date | Jul 20, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/0428
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Aspects of the invention include receiving, by a processor, an unencrypted object that includes plaintext and metadata that describes the plaintext. A data encryption key (DEK) and a nonce key for the unencrypted object are obtained by the processor. The nonce key is different than the DEK. The unencrypted object is encrypted by the processor. The encrypting includes generating a nonce based at least in part of the plaintext and the nonce key. The encrypting also includes generating ciphertext and a metadata authentication tag that includes a signature of the metadata. The generating is based at least in part on the plaintext, the metadata, the DEK, and the nonce. An encrypted object that includes the ciphertext, the metadata, and the metadata authentication tag is created.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.