Secure Screen Projection via Security Flag Detection

Solution Overview

Problem

Conventional screen projection methods compromise user experience by exposing sensitive information, such as passwords, during screen sharing, leading to privacy risks and poor usability when interfaces with security requirements are projected without proper protection.

Innovation Solution

A method where a first device identifies security requirements for each window interface and sends a security protection instruction to a second device, ensuring that interfaces with security requirements are displayed securely, while allowing normal operation on interfaces without such requirements, by using task IDs and security flags to manage the projection and display of sensitive content.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If screen projection is used to share device interface, then collaboration efficiency is improved, but privacy security deteriorates due to exposure of sensitive information like passwords

Engineering Contradiction:

Improvecollaboration efficiencyVSAvoidprivacy security

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies local quality by differentiating display treatment for different interface regions. Sensitive areas (password fields, personal information) are detected and marked with security flags, then rendered with different visual properties (blur, mask, or block) compared to non-sensitive areas. This allows collaborative display while protecting specific sensitive regions.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements preliminary action by pre-identifying and marking sensitive information regions before screen projection occurs. Security flags are set on potential sensitive areas in advance, and the projection system checks these flags during display to apply appropriate protection measures, preventing privacy leakage before it can occur.

Inventive Principle:

Principle #10Preliminary action

2Loss of information

If all window interfaces are projected to second device, then information completeness is improved, but security risk increases due to exposure of sensitive content

Engineering Contradiction:

Improveinformation completenessVSAvoidsecurity risk

Core Design Contradiction:

Loss of informationVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by differentiating display treatment for different interface regions. Sensitive areas (password fields, personal information) are detected and marked with security flags, then rendered with different visual properties (blur, mask, or block) compared to non-sensitive areas. This allows collaborative display while protecting specific sensitive regions.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements preliminary action by pre-identifying and marking sensitive information regions before screen projection occurs. Security flags are set on potential sensitive areas in advance, and the projection system checks these flags during display to apply appropriate protection measures, preventing privacy leakage before it can occur.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If security protection is applied to all projected interfaces, then privacy security is improved, but usability deteriorates due to restricted operation on protected interfaces

Engineering Contradiction:

Improveprivacy securityVSAvoidusability

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent applies local quality by differentiating display treatment for different interface regions. Sensitive areas (password fields, personal information) are detected and marked with security flags, then rendered with different visual properties (blur, mask, or block) compared to non-sensitive areas. This allows collaborative display while protecting specific sensitive regions.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent applies segmentation by dividing the projected interface into multiple regions: sensitive regions (with security flags) and non-sensitive regions (without security flags). Different display and interaction rules are applied to each segment, allowing users to interact freely with non-sensitive areas while sensitive areas receive appropriate protection.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20240411505A1Display Method and Electronic Device

Publication Date: 2024.12.12 HUAWEI TECH CO LTD

AI summary

A first device projects a first window interface to a second device after receiving a screen projection instruction entered by a user. The first device receives an instruction for running a second window interface, and may send a task identity of the second window interface and a security protection instruction to the second device after determining that the second window interface includes a security flag bit. Further, the second device displays the first window interface and a security interface, where the security interface is a projected interface of the second window interface. In this way, the second device can securely display an interface with a security requirement, and can also ensure that the user performs a normal operation on an interface without a security requirement.