Keyword search for an encrypted messaging system
US12395347B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2023 |
| Grant date | Aug 19, 2025 |
| Priority date | — |
| Expiry date | Oct 1, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3297
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques to index and search encrypted content are presented. A method includes assigning a unique encryption key to an organization (Org_Key) of which a user is a member, storing a first mapping of a user ID of the user to a resource ID of a resource, storing a second mapping of a first hash of the unique encryption key and the plaintext word to the resource ID, and storing a third mapping of a second hash of the Org_Key, the resource ID, and the plaintext word to a uniform resource locator link. A search for a given plaintext search word is performed by hashing the plaintext search word with the Org_Key to obtain the resource ID, and then hashing the plaintext search word, the resource ID and Org_Key, the result of which may map to a URL that points to the desired encrypted content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.