Department of Electrical & Computer Engineering Advisor: Professor Michael Zink Team: Brigit Lyons Fadi Maalouli Tony Panetta Renzo Silva Midway Design Review

Department of Electrical & Computer Engineering 2 Outline Design overview and modifications MDR goal reminder Progress of each component Demo Division of labor Prototype Cost CDR goals

Department of Electrical & Computer Engineering 3 Website Account Database Bluetooth Module Processor (AIRCable SMD) (Intel Atom) Old Design Security Device

Department of Electrical & Computer Engineering 4 Problems with Old Design Reliant on Internet/3G connection Problems with AIRCable SMD Bluetooth module Intel Atom Processor very complex to work with

Department of Electrical & Computer Engineering 5 Bluetooth Module Microcontroller (Roving Network (GHI EMX) RN-41) New Design Security Device

Department of Electrical & Computer Engineering 6 Solution No need for a database/website to get encryption key Roving Network RN-41 Bluetooth module is easy to use and has a high success rate GHI EMX development system simple to interface with

Department of Electrical & Computer Engineering 7 MDR Goals Working encryption algorithm Hardware and software algorithms evaluated Basic Bluetooth communication RN-41 Module communication Basic phone application Basic communication with RN-41

Department of Electrical & Computer Engineering 8 Current Project Status

Department of Electrical & Computer Engineering 9 C AES Performance * Speed (Gb/s) = (128*Number of Runs)/(Runtime*10 9 ) **Tests performed on a 2.66GHz machine ***Speeds calculated based on code execution time. On a multitasking system, this includes both idle time and processor time.

Department of Electrical & Computer Engineering 10 Verilog AES Performance Decryption: 13 clock cycles per 128-bit decrypt (red) + one-time 13 cycle key expansion each time encryption key is changed (blue) Encryption: 13 clock cycles per 128-bit encryption (red) [key expansion can be done in parallel here]

11 Comparison of Performance Encryption: C: 0.025Gb/s at 2.66GHz Number of clock cycles per encryption run = (128/Speed(Gb/s))*CPU Clock Speed With a 2.66Ghz at 0.025Gb/s -> 13,620 clocks cycles per encryption run Assuming 1% of runtime spent on processor -> 136 CPU cycles per run Verilog: 13clock cycles Verilog performs (136/13) ≈ 10x faster Decryption C: 0.005Gb/s at 2.66GHz Number of clock cycles per decryption run = (128/Speed(Gb/s))*CPU Clock Speed With a 2.66Ghz at 0.025Gb/s -> 68,096 clocks cycles per encryption run Assuming 1% of runtime spent on processor -> 681 CPU cycles per run Verilog: 13clock cycles Verilog performs (681/13) ≈ 52x faster The assumption that 1% of C code runtime is spent on the processor is used to offset the fact that on a multitasking system, the total runtime includes both processor and idle cycles. Department of Electrical & Computer Engineering

12 Power Control Power Supply Voltage Regulator (5v to 3.3V) RN-41 Bluetooth 5V Switch 5V Switch Power Control (PIO 7 and 8) 3.1V – 800mA 3.3V Input 5V 12V 5V – 3A 12V – 3A (peak current) 12V Switch (30W max) 12V Switch (30W max) 3.1v Switch Gnd 500nF Cap 100k R

Department of Electrical & Computer Engineering 13 Bluetooth Voltage (DC) Min 3.0 Typ 3.3 Max 3.6 Average Power Consumption when Connected (normal mode) 30mW Output logic level HIGH VDD-0.2V The RN41 delivers up to 3 Mbps data rate for distances to 100M.

Department of Electrical & Computer Engineering 14 Android Application Development and testing environment Android SDK plug-in for Eclipse IDE on Win 7 Testing on Motorola Droid and HTC EVO handsets Application built off of open source BlueTerm Fundamentals for programming/communicating with RN-41 via Bluetooth Additional functionality will be easy to integrate

Department of Electrical & Computer Engineering 15 Demo 1.Open Application 2.Bring up Options Menu 3.Select “Connect device” 4.Scan for HDDlock if not shown in device list 5.Select HDDlock from device list 6.Enter pairing code ‘1234’ if not already paired 7.Send commands to RN-41 to enter command mode, set pin as output, and set pin high 8.Disconnect

Department of Electrical & Computer Engineering 16

Department of Electrical & Computer Engineering 17 Roles and Management Brigit (CSE): Set up Android development/testing environment and worked on the Android Application Administrative: Webmaster Fadi (EE): Worked on enabling/configuring Bluetooth module Administrative: Scheduling Tony (CSE): Worked on encryption algorithms in C and Verilog Administrative: Documentation Renzo (EE): Designed power management between RN-41 and hard drive, and worked on the Android Application Administrative: Purchase Orders

Department of Electrical & Computer Engineering 18 Current and Projected Costs Prototype Cost: $ GB Hard Drive: $35.99 Cables: $17.92 High power MOSFETs: $2.98 RN-41: $59.95 GHI EMX Development System: $125 PCB Fabrication: $50

Department of Electrical & Computer Engineering 19 CDR Goals Android Application: User login/authentication Send encryption key to security device Security Device: Communication between development board and Bluetooth module Encryption algorithm working on development board Research OS libraries for read/write from hard drive

Department of Electrical & Computer Engineering 20 Questions?