Data de-duplication among untrusted entities
US11218296B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2019 |
| Grant date | Jan 4, 2022 |
| Priority date | — |
| Expiry date | Mar 15, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3239
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A data storage system allows data to be encrypted and de-duplicated at the same system. By way of example, a server of the data storage system may request a client device which intends to upload a data block to transmit a first fingerprint of the data block to the server. The first fingerprint may be derived from the plaintext of the data block. The server may apply a one-way function to the first fingerprint to generate an encryption key and transmit the encryption key to the client device. The client device uses the encryption key to encrypt the data block and generates a second fingerprint which is derived from the ciphertext of the data block. The server uses both the first fingerprint and the second fingerprint to verify the data block and the legitimacy of the client attempting to upload the data block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.