130 Raksha
130 : Raksha
- Author: Sinchana
- Description: Secure Packet Authentication Engine for V2X Communication
- GitHub repository
- Open in 3D viewer
- Clock: 1000000 Hz
How it works
Raksha is a lightweight Secure Packet Authentication Engine designed for secure V2X communication systems.
The design checks whether an incoming packet is authenticated using a predefined secret key.
The hardware performs an XOR operation between:
- Incoming packet data (
ui_in) - Secret key (
0xA5)
Authentication condition:
5A XOR A5 = FF
If the result matches the expected value:
- Authentication OK signal becomes HIGH.
Otherwise:
- Alert signal becomes HIGH.
Outputs:
uo_out[0]→ Authentication Successuo_out[1]→ Alert Detection
The design demonstrates basic hardware-assisted packet authentication suitable for low-latency vehicular communication systems.
How to test
- Apply clock and reset signals.
- Provide packet data through
ui_in[7:0]. - Observe output signals.
Valid Packet Test
Input:
ui_in = 0x5A
Expected Output:
uo_out[0] = 1uo_out[1] = 0
Invalid Packet Test
Input:
ui_in = 0x12
Expected Output:
uo_out[0] = 0uo_out[1] = 1
The simulation testbench automatically verifies both valid and invalid authentication cases.
External hardware
The project can interface with:
- FPGA development boards
- Vehicle communication modules
- Microcontrollers
- Embedded V2X systems
- LEDs for authentication status indication
Possible hardware usage:
- Green LED → Authentication Successful
- Red LED → Unauthorized Packet Alert
The design is compatible with Tiny Tapeout ASIC flow and can be integrated into lightweight secure communication hardware systems.
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | Packet Bit 0 | Authentication OK | |
| 1 | Packet Bit 1 | Alert | |
| 2 | Packet Bit 2 | ||
| 3 | Packet Bit 3 | ||
| 4 | Packet Bit 4 | ||
| 5 | Packet Bit 5 | ||
| 6 | Packet Bit 6 | ||
| 7 | Packet Bit 7 |