HDDLock

Department of Electrical & Computer Engineering

Advisor:Professor Michael Zink

Team:Brigit Lyons

Fadi MaalouliTony PanettaRenzo Silva

Final Project Review

HDDLock

Outline

• System Overview• FPR Deliverables• Android Application• PC Software• DE2 Cryptography• Demo• Cost Analysis• SDP Day Goals

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System Overview

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Security device

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System Block Diagram

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FPR Deliverables

Android Application:• Implement user-friendly options for the

Android applicationSecurity Device:• Implement user-friendly interface to the

Android application• Implement interface to send and receive files

from the computer

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Android Application

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Android Application Specifics

• Login Requires Username and Password– Encrypted using AES-128– Stored in a .txt on internal storage

• Forgotten passwords recovered via security questions

• Encryption key generated from Username and Password

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PC Software/GUI

• Allows the user to select files• Transfer them to the DE2 board for encryption• Transfer the encrypted files to PC• Progress bar shows progress of encryption.

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Data Flow

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• When encrypt/decrypt is pressed, DE2 board will be detected• GUI will send 4 setup packets to the DE2 board

– Packet ID (1packet)– AES settings : encryption/decryption (1packet)– File size(2packets/16bytes)

• Data will be sent to the DE2 board in packets of 8 Bytes• Data will be received on PC in packets of 8Bytes• AES operation acts on 16 byte blocks(128 bits)• Data packets are always sent to the encryptor in pairs(128bits)• If file size wasn’t an even multiple of 16 bytes; padding is required

– Example a file of size 40 bytes. (X is data bytes)

Final block padded

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DE2 Cryptography

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ISP1362 USB 2.0

RS232 Serial UART

ISP1362 USB 2.0

AES Control

Key FIFO

File Input FIFO

File Output

FIFO

Key in from RN-240

File in and Encrypt/Decrypt from PC

File out to PC

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Demo

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Cost Analysis

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Product Cost

RN-240 Bluetooth Module $59.99

RN-240 Power Cable $14.99

JTAG Transfer Cable x2 $10.00

USB Bluetooth Transceiver x2 (for testing) $39.98

DE2 Development board Borrowed (Cost $280 if purchased)

Total $124.96 ($404.96 if DE2 purchased)

*Fabrication costs for the FPGA device are several thousand dollars and outside of the scope of this project’s budget

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SDP day Goals

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• Refine GUI• Clean up and comment code• Perfect demo

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Questions?