Hangzhou Alicloud Feitian Information Technology Co., Ltd.

Institute of High Performance Computing

Sheng Wang

Feifei Li

Erping Li

Daming Zhang

Huorong Li

A database operating method and a fully encrypted database are disclosed. The method is executed by a read node in a write once read many database and includes: receiving a reading operation request from a user, determining that a writing operation is required for a data encryption key table in response to the reading operation request; establishing a connection with a write node and forwarding the writing operation; acquiring the data encryption key table that the write node has updated based on the writing operation; generating, based on the updated data encryption key table, a reading operation response and sending the reading operation response to the user. Thus, the present disclosure proposes a write once read many solution applicable to a fully encrypted database, which solves the problem of writing encryption key information of the read node in a distributed database scenario.

Operating method for database and fully encrypted database

First and second electrically conductive rods are provided inside a shielded electromagnetic test chamber. These rods are energized to radiate electromagnetic energy inside the chamber. The rods are mounted inside the chamber at right angles to one another, the first rod is movable through the interior volume in a first direction perpendicular to its long axis, and the second rod is movable through the chamber in a second direction perpendicular both to its own long axis and to the first rod's direction of motion. Energy is supplied to the two rods in a way that enhances the uniformity of the electromagnetic field applied to a working volume inside the chamber as the two rods move through the chamber.

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Singapore, Singapore

Sheng Wang