0. Application Design Document
Remote backup and recovery service
for Android device owners
Application Design Document

1. Roles & Responsibilities
Company: Deutsche Telekom
Academic advisor: Yuval Elovici
Technical advisor : Assaf Shabtai
Project Team:
Limor Segev
Eran Frieman
Carmel Karni

2. Introduction An Android OS could be attacked by hackers:
Open platform
Users will access the Internet intensively
Everyone can develop applications for Android
Successful attack on Androids may:
Expose private information
Prevent T-Mobile customers from using T-Mobile services
Flood T-Mobile’s customer service infrastructure and personnel.
No easy way exists to “fix” mobile devices.

3. Introduction The Current situation is that backup is possible for:
Documents
Media files
Not for Application files
Deutsche Telekom is interested in developing a platform that
will enable:
Backup and Restore users’ Android terminals
Remote monitoring and offline analysis of Android application

4. System Requirements
The System has three major Components: Device Service, Server, MySql Database, Desktop application.
The System has two groups of users: Device holders, Managers.
Managers actions:
Produce reports / statistics
Add managers
Device holders actions:
Backup installed applications
Restore the device / specific application(s)

5. System Requirements The Device Service is configurable:
Enables auto or manual backup (on apk installation)
Enable / Disable the service
Restore applications on demand
The service keeps the login data (no need to re-insert when sending/receiving data from the server).
The service-agent will contact the server and get updates (for example about malwares detection)
The Server will be available for requests from both users types at all times.
Communication with the server will be done using HTTP.

6. Customer’s Android device
System Architecture
1. Downloading and installing a new application
2. System’s agent send the new application files (apk) to the external server
3. Sending the new application files (apk) to the storage server with additional information to enable restoring users’ systems
4. Backed-up application
apk
apk
apk
apk
apk
apk
apk
Internet
Customer’s Android device
Server
Storage
5. Threat detection system checks files and alerts the server about threats

7. Customer’s Android device
System Architecture
Autor / Thema der Präsentation 7
3. Sending an alert to the user
apk
apk
apk
apk
Internet
Customer’s Android device
Server
Storage
apk
2. Sending analysis result: “malicious application”
Threat detection system checks apks with status “UNCHECKED”

8. Autor / Thema der Präsentation
System Architecture
apk
apk
Internet
Storage Server
NetShield Analysis Server
apk

9. Classes and Relationships
ServerCommunication
client
ConnectionHandler
ConnectionAcceptor
Reactor
ReactorData
Protocol
ServerProtocol
MessageProcessor
Task
SQLInteface
ClientAgent
Listener
Restorer
ClientGuiFacade
ManagerGuiFacade
ManagerLogic
AgentComManager
MngComManager
gui
ClientGUI
ManagerGUI
Gui

10. Server Class Diagram

11. Service (Agent) Class Diagram

12. Manager Class Diagram

13. User Interface – Service
Main Screen

14. User Interface – Service
Configuration Screen

15. User Interface – Service
Registration Screen

16. User Interface – Service
Login Screen

17. User picks the applications to recover
User Interface – Service
Recovery List Screen
User picks the applications to recover
Recover

18. Application List Screen
User Interface – Service
Application List Screen

19. User Interface – Manger
Login Screen

20. User Interface – Manger
Main Screen

21. User Interface – Manger
Add Manager Screen

22. User Interface – Manger
Reports Menu Screen

23. User Interface – Manger
Users Report

24. User Interface – Manger
Applications Report

25. Users-Applications Report
User Interface – Manger
Users-Applications Report

26. User Interface – Manger
Rollbacks Report

27. User Interface – Manger
Malwares Report

28. Task List Overview Server 01/04/09 – 15/04/09
DB construction 16/05/09 – 20/05/09
Manager – Desktop application 21/04/09 – 05/05/09
Device Service (Agent) 06/05/09 – 20/05/09
Service and Sever communication 21/05/09 – 31/05/09
Testing /06/09 – 20/06/09

29. Questions?