Reverse Engineering - Methods and Process

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Laura Barilli laura.barilli@mail.polimi.it

Luisa Cucugliato luisa.cucugliato@mail.polimi.it

Friday, May 27, 2016 B3Lab, Via Ponzio, Building 21

Reverse engineering of biomedical elaborated signal

– part 2

2

Detection of biomedical signal..

Context and Problem

..with fitness trackers..

..that are closed source!

Reverse Engineering

Open source codeProcessed data

3http://www.mi.com/sg/miband/#s2

DoneProblem definitionIdea and solutionState of art

Doing

To do

Search of methodsWriting the code

Update of code

Final app

Work Organization

4

Grafic interface

DoneProblem definitionIdea and solutionState of art

Doing

To do

Search of methodsWriting the code

Update of code

Final app

4

Grafic interface

Work Organization

Classes

AttributesMethods

View Controller

CodeAccording to the output of view it chages execution

User interface

Model

Preservation of information

Method: Swift

5

[1]

[2]

[1] https://www.xcoding.it [2] https://developer.apple.com/swift/

import UIKit

Objects

There are two major players involved in all Bluetooth low energy communication:

Central Peripheral

6https://developer.apple.com/

Method: Bluetooth Connection

There are two major players involved in all Bluetooth low energy communication:

import CoreBluetooth

Central Peripheral

6https://developer.apple.com/

Method: Bluetooth Connection

Peripheral

Service(Heart Rate)

Characteristic

Characteristic

Characteristic

Service(Vibration)

Characteristic

Characteristic

Characteristic

Service(Steps)

Characteristic

Characteristic

Characteristic

Central Device

Service(Upgrade)

Characteristic

Characteristic

Characteristic

Central Device

Bluetooth Communication

7

Bluetooth CommunicationPeripheral

Central Device Central Device

HEART RATE

Characteristic

Characteristic

Characteristic

Vibration

Characteristic

Characteristic

Characteristic

Steps

Characteristic

Characteristic

Characteristic

Upgrade

Characteristic

Characteristic

Characteristic

7

8

Overview of code

9

Initializate CBCentralManager

Verify the state of Bluetooth connection

Search of peripherals

Display peripherals to the user

Search Heart Rate UUID (0x180D)

Access to the characteristics of Heart Rate (2A37, 2A39, FF04)

Activation of PPG

Active selection by the user

Search of services

Code

10

Preliminar Results

Reverse Engineering of Biomedical Elaborated Signal

Laura.barilli@mail.polimi.itLuisa.cucugliato@mail.polimi.it

www.facebook.com/reebes.project2016/

Contacts

www.slideshare.net/La_Lu

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