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Intelligent terminal safety input method capable of resisting side signal channel attack

A side channel attack, intelligent terminal technology, applied in the field of intelligent terminal security input against side channel attacks, can solve the problems of increasing user input time, difficult to guess user input, and difficult for users to widely accept, etc., to improve security, The effect of increasing difficulty

Inactive Publication Date: 2017-09-26
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Random keyboard ensures that the keyboard layout is different for each invocation of the user, making it difficult for attackers to guess user input based on keyboard layout information
But the random keyboard increases the time of user input, it is difficult to be widely accepted by users

Method used

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  • Intelligent terminal safety input method capable of resisting side signal channel attack
  • Intelligent terminal safety input method capable of resisting side signal channel attack
  • Intelligent terminal safety input method capable of resisting side signal channel attack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The intelligent terminal security input method against side channel attack in this implementation: includes the following steps:

[0031] 1. Safe cursor movement control:

[0032] Calculate the moving speed and direction of the cursor by monitoring the angle at which the user tilts the device, such as figure 2 The orientation sensor shown can monitor the inclination angle of the equipment around each coordinate axis. The user selects the key to enter by tilting the device to move the cursor on the virtual keyboard. Tilt force and angle are defined as:

[0033]

[0034] θ=arcsin(β / M)

[0035] Among them, M is the magnitude of the virtual force that controls the moving speed of the cursor, θ is the direction of the virtual force that controls the moving direction of the cursor, and α and β are the inclination angles of the device around the x-axis and y-axis recorded by the direction sensor.

[0036] According to the investigation, the attacker can obtain the data...

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Abstract

The invention discloses an intelligent terminal safety input method capable of resisting side signal channel attack. The method includes steps of calculating movement direction and speed of a cursor through direction sensor data, and identifying the click action of a user to the back face of equipment in real time through the change characteristics of an acceleration sensor data of the intelligent terminal; improving calculation method of cursor movement speed, and adding random parameter in calculating the movement speed so that an attacker is hard to correctly calculate the actual position of the cursor even though the direction sensor data is acquired. Through tilt operation and back click of the intelligent terminal, a user can input password and other private information, and effectively prevent different types of side channel attacks.

Description

technical field [0001] The invention belongs to the privacy protection technology of smart terminals, and in particular relates to a safe input method of smart terminals resistant to side channel attacks. Background technique [0002] With the rapid popularization of smart terminals, more and more users need to input passwords and other sensitive information on smart terminals. At the same time, more and more side-channel attacks against smart terminals are emerging. Side-channel attacks are mainly divided into two types: internal attacks and external attacks. The internal attack means that the attacker obtains sensor data by installing malicious programs on the device to infer user input content, such as gyroscopes, accelerometers, cameras, microphones, and light sensors, etc.; external attack means that the attacker achieves the attack purpose through external means of the device. For example, attackers can use computer vision, screen residue, etc. to speculate on user in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/83
CPCG06F21/83
Inventor 凌振周佳欢吴文甲杨明付新文
Owner SOUTHEAST UNIV
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