Cryptographic keys for authorization requests from a data storage device
US12101418B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2022 |
| Grant date | Sep 24, 2024 |
| Priority date | — |
| Expiry date | Dec 1, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3265
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is a data storage device. A data port transmits data between a host computer system and the data storage device. A non-volatile storage medium stores encrypted user content data and a cryptography engine connected between the data port and the storage medium uses a cryptographic key to decrypt the encrypted user content data. The access controller generates a challenge for a manager device. The challenge comprises a blinded public key of an ephemeral unlock key pair that is blinded by an unlock blinding key. The challenge further comprises the unlock blinding key in encrypted form. The access controller further provides the challenge to the device to be authorized for sending the challenge to the manager device; receives a response to the challenge; decrypts the unlock blinding key and calculates a shared secret; and upon determining that the response indicates approval of registering the device, registers the device to be authorized as an authorized device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.