Reverse engineering
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This is our reverse engineering . We almost completely rewritten the code of the Xiaomi fitness tracker, and we are creating our personal app which will be able to extract the heart rate. This is an overview of our work.
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Reverse engineering
- 1. Laura Barilli laura.barilli@mail.polimi.it Luisa Cucugliato luisa.cucugliato@mail.polimi.it Thursday, April 12, 2016 Politecnico di Milano Dipartimento di Elettronica, Informazione e Bioingegneria (DEIB) NECST lab, Via Ponzio, Building 20 Reverse engineering
- 2. Reverse Engineering Open source codeProcessed data 1
- 4. Classes Attributes Methods Objects Swift View Controller Model Code According to the output of view it chages execution Preservation of information User interface [*] https://developer.apple.com/swift/ 3 [*]
- 5. Bluetooth Low Energy [*] https://learn.adafruit.com/introduction-to-bluetooth-low-energy/introduction 4 [*] Bluetooth Smart Power version of Bluetooth that was built for the devices that run for long periods Platform supported •iOS5+ •Android 4.3+ •Apple OS X 10.6+ •Windows 8 •GNU/Linux Vanilla BlueZ 4.93+
- 6. CB Core Bluetooth There are two major players involved in all Bluetooth low energy communication: central and peripheral https://developer.apple.com/ 4 Smartphone Device • CB Central Manager: object that controls and manages the Bluetooth of the iPhone • Core Bluetooth: Library that manages bluetooth connection
- 7. Peripheral CB Central Manager Service 1 Characteristic Characteristic Characteristic Service 2 Characteristic Characteristic Characteristic Service 3 Characteristic Characteristic Characteristic Central Device Central Device Service 4 Characteristic Characteristic Characteristic https://developer.apple.com/ 5
- 8. Peripheral CB Central Manager Heart Rate Characteristic Characteristic Characteristic Vibration Characteristic Characteristic Characteristic Steps Characteristic Characteristic Characteristic Central Device Central Device Upgrade Characteristic Characteristic Characteristic https://developer.apple.com/ 5
- 9. Peripheral CB Central Manager HEART RATE Characteristic Characteristic Characteristic Vibration Characteristic Characteristic Characteristic Steps Characteristic Characteristic Characteristic Central Device Central Device Upgrade Characteristic Characteristic Characteristic https://developer.apple.com/ 5
- 10. Overview of code APP Initialization and allocation of Central Manager Research peripherals Find peripherals? Research Services Find services? Research characteristics HEART RATE YES NO YES NO 6
- 11. Allocate and initialize a Central Manager instance Verify the state of Central Manager Central Manager 7
- 12. Peripherals Interface view Mi Controller Every peripheral is saved in an array which is shown on the Table View 8
- 13. Services UUID: Universally Unique Identifier Numbers which identificate a specific service Standard services have a 16-bit UUID 9
- 14. Heart Rate Service Assigned Number: 0x180D Two characteristics: 2A37 and 2A39 10 The Heart Rate Service shows heart rate and other data related to a heart rate sensor PPG sensor Bpm
- 16. Contacts Reverse Engineering of Biomedical Elaborated Signal Laura.barilli@mail.polimi.it Luisa.cucugliato@mail.polimi.it https://www.facebook.com/reebes.project2016/ 12
Editor's Notes
- Is easy to read Require less code Fast Supports dynamics library OGGETTO ISTANZA DI UNA CLASSE RIFERIMENTI, CLASSE UOMO
- Breve distanza 10 metri velocità di trasmissione La trasmissione dei dati via bluettoth è facilitata da un oggetto chiamato core bluetooth che è alla base dei dispositivi periferici GRAFICO, LAYOUT DIAPOSITIVA, SCRIVERE CORE BLUETOOTH
- Sistema trasmissione dati basato sul BLE La trasmissione dei dati via bluettoth è facilitata da un oggetto chiamato core bluetooth che è alla base dei dispositivi periferici
- SPECIFICARE I SERVIZI
- SPECIFICARE I SERVIZI
- IMMAGINE DELL’INTERFACCIA