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CTOnews.com, August 28, according to the release of Kirin Software, Kirin Software developed and launched the Galaxy Kirin operating system "X anti-screenshot" function, which can protect users' privacy and data security by controlling the screenshot application and screenshot range in the daily use of Galaxy Kirin operating system. It has been widely used in finance, audit and other fields.

The "X anti-screenshot" function of Galaxy Kirin operating system is applied for the first time on the independent innovation platform, which is realized by adding extension protocol, and has three screenshots: window screenshot, full-screen screenshot and regional screenshot. When the window displays sensitive information or private data, the Galaxy Kirin operating system "X Anti-Screenshot" function can control the window and content of the screenshot tool according to the above three situations. it includes sensitive window screenshot control, control window query and anti-screenshot function query.

Galaxy Kirin operating system "X anti-screenshot" function is based on the X extension framework and is realized by adding a private protocol in the X layer, independent of the window manager and synthesizer used by the system, supporting multiple windows and window minimization scenarios, with better privacy, flexibility and scalability, and supporting common screenshot software on the control system: kylin-screenshot, imagemagick, flameshot, QT grabWindow, Blue Screenshot and so on.

Close the window tube to close the window manager, which means that the synthesizer is also closed, the settings of the two windows are controlled, the window area is all masked, and the window title bar cannot be displayed.

Open the window tube, close the synthesis window manager, close the synthesizer, and set the control of the two windows. The screenshot effect is shown below. The screenshot control function supports closing the synthesizer.

Open the window tube, open the synthesis window manager and synthesizer, control ordinary windows and browser windows, and the browser cannot be displayed due to the title bar inside the window.

Galaxy Kirin operating system "X anti-screenshot" technical details:

Galaxy Kirin operating system "X anti-screenshot" function general frame diagram

CTOnews.com learned that the Galaxy Kirin operating system "X anti-screenshot" function is based on the added protocol of the X framework: the anti-screenshot protocol uses X11 C / S communication mechanism for data transmission. The client side provides the screenshot interface for the application to call to achieve the application control settings; the server side provides the client interface to complete the screenshot settings of the screenshot software. This function has a wide range of applicability, is not limited by the CPU directive, and is suitable for any architecture.

The anti-screenshot protocol registers to Xserver through the X extension mechanism, and registers the anti-screenshot protocol when the Xserver extension is initialized. The protocol includes extension initialization function and extension processing function. When the Xserver receives the data, it distributes the data to the extension handler, which performs anti-screenshot processing on the data.

X11 protocol provides three types of screenshot interfaces: image acquisition, image acquisition based on shared memory, and region copying. Common screenshot software based on X uses these three interfaces. "X anti-screenshot" function is to control the above three interfaces, which is divided into application control settings and screenshot control processing.

Application control settings: as the client side, the Xserver is informed by calling the Screenshot interface whether the application window is controlled or not.

Screenshot control processing: when the screenshot software calls the X11 screenshot interface, the Xserver side judges whether the captured content belongs to the controlled window according to the registered extension protocol.

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