1 / 21

PDR Keeping The Secret

PDR Keeping The Secret . Group: Adebayo Adeyemi, Joseph Hayward, Mark Kohls, Simon McAuliffe Advisor: Dennis Goeckel. What is encryption?. So, What’s wrong with it?. Encrypted transmissions can be recorded These recording can be broken Information can be sensitive for years

jenaya
Download Presentation

PDR Keeping The Secret

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. PDRKeeping The Secret Group: Adebayo Adeyemi, Joseph Hayward, Mark Kohls, Simon McAuliffe Advisor: Dennis Goeckel

  2. What is encryption?

  3. So, What’s wrong with it? • Encrypted transmissions can be recorded • These recording can be broken • Information can be sensitive for years • Computers are getting faster and faster

  4. Applications • Military • Out in the field • Missions only last less than 12 hours • Sensitive can be transmitted • Many people out in the field • No knowledge of where the enemy may be • Commercial • Keep people from recording inside building • Keep signal from being recorded from outside building

  5. Competitors • Direct link • Trunked radio system • Frequency hopping spread spectrum.

  6. Direct Link Large Directed Antenna Heavy, Expensive • Marine tactical data system.

  7. Trunked System Pre-known shared key needed Even UMASS has one Easily recorded with a spectrum analyzer

  8. Frequency Hopping A pre-known shared key for communication The security can be easily broken

  9. System Requirements • Battery life of at least 12 hours • Receive and transmit • Operate while walking • Operate up to 300 meters. • Receive signal with 95% success rate. • Voice Transmission Bandwidth • Maintain secure communications • Less than 10% interception rate • Handheld and less than 2lbs.

  10. Proposed Solution Step 1: Send test signal to desired radio.

  11. Proposed Solution Step 2: RX radio sends back reply signal. Friends measure this signal strength.

  12. Proposed Solution Step 3: TX radio sends out message. Friends not in range transmit noise.

  13. Hardware Requirements • Receiver with Signal Strength Indicator • Transmitter without interference filtering • Battery Power • 300 meter Range • Narrow band FM

  14. Radio Diagram Transceiver Microphone Receiver Antenna Microcontroller Transmitter Speaker

  15. Radio Choice Choice: Linx Technologies HP3

  16. Software Requirements RX Radio TX Radio RX Radio RX Radio

  17. Design Challenges • Noise • Appropriate Signal Threshold • Duration for transmission • Variable transmission strength • Making overall system compact • SMD vs. Through Hole components • Demonstrate functioning system • Computer display of radio activity

  18. MDR Deliverable The goal for MDR will be to demonstrate measurement of receive signal and transmitting noise. Step 1: Send test signal to desired radio.

  19. MDR Deliverable The goal for MDR will be to demonstrate measurement of receive signal and transmitting noise. Step 2: RX radio sends back reply signal. Friends measure this signal strength.

  20. MDR Deliverable The goal for MDR will be to demonstrate measurement of receive signal and transmitting noise. Step 3: TX radio sends out message. Friends not in range transmit noise.

  21. Questions?

More Related