Android password secure input keyboard

Abstract

The invention discloses an Android password security input keyboard, which relates to the technical field of Android security keyboard. The invention comprises a configuration layer, an analysis layer, a drawing layer, a keyboard content providing layer, an event processing layer, an encryption layer and an interface layer. The invention avoids the third party from obtaining the input content through the way of screen capture by calling the system getWindow (). SetFlag () method and changing the system parameter to prohibit the action of screen capture. By overriding the setText method in thecontrol EditText, the text content is an encrypted placeholder, which avoids the leakage of the same input content caused by the echo when the input content is input. The content sequence of content key is generated by random algorithm in so library, and the content sequence of content key is obtained by drawing layer at the same time, which ensures the dynamic random generation of secure keyboard. Two encryption methods, internal encryption and external encryption, are used to improve the security of the keyboard.

Description

technical field [0001] The invention belongs to the technical field of Android security keyboards, in particular to an Android password security input keyboard. Background technique [0002] The system keyboard of the Android platform or the custom keyboard based on the system keyboard has security risks in some aspects; the details include the following: [0003] 1. Continuous screen capture: When entering important information such as passwords, a third party can obtain continuous screen pixel information during the entire input process by means of screen capture, and obtain the input content by analyzing these pixel information. [0004] 2. Obtain echo: The system keyboard will display the input content in the input box during the input process. Even if the "password mode" is set, there will be echo, and others may obtain the input content through the echo. [0005] 3. Third-party replacement: The system keyboard may be replaced by a third party during use; once it is re...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide Android password safe input keyboard, change system parameter by calling system getWindow (). Continuous screenshots to obtain keyboard input information; draw keyboard View and custom control EditText interfaces through custom controls and rewrite the onFocusChange and onTouchEvent functions of the control EditText to control the hiding of the system keyboard to prevent the system keyboard from being replaced by a third party; use the random random algorithm through the so library Generate content key content sequence to realize random keyboard, avoiding information security problems caused by third-party monitoring input content; key input content adopts two encryption methods, internal encryption and external encryption, to prevent third parties from obtaining input content in the form of dump memory; solved The existing system keyboard has problems such as continuous screenshots, echo acquisition, third-party replacement, monitoring input content, and content storage in plain text, which lead to potential safety hazards of the system keyboard

Images