Audio Steganography Project

The goal of this project is to create an encrypted audio steganography device within a SoC. This device will take a raw digital audio stream and hide data (for example, an ASCII-encoded message) within it. Prior to its insertion into the audio stream, the data will be encrypted using a standard encryption scheme. Viewing of the data will depend on the recipient possessing the correct key to both decrypt and properly extract the data. The device will be capable of encrypting/encoding as well as decoding/decrypting the data.

Components

Presentations and Files

Block Diagram

Physical Layout

Below is a view of the final layout for our design. Click on the image to see more layout images.

Proposal Review Concerns

1. Why Soc? - Application ideas so far: MIDI watermark for copyright purposes (embed chip in a keyboard)
2. Power estimation? - Investigating options ... PowerMill?
3. Numbers for each block? (Gates? LUTs?)
4. Hardware PRNG - Please see Pseudo Random Numbers section.
5. Crypto disclaimer - The strength of the crypto core in the system is not yet a primary concern. The system will be designed such that a stronger core could easily be substituted for the triple DES.
6. Number your slides - Addressed.
7. Better block diagram - In progress...

References

• Adli; Nakao; "Three Steganography Algorithms for MIDI Files"; University of Ryukys; Okinawa, Japan; August, 2005
• Artz, Donoavan; "Digital Steganography: Hiding Data Within Data"; IEEE Internet Computing Magazine; June, 2001
• Jamil, Tariq; Ahmad, Afaq; "An Investigation into the Application of Linear Feedback Shift Registers for Steganography"; SoutheastCon, 2002; Proceedings IEEE; April 5-7, 2002
• Mora, F.; Torrubia, A.; "Perceptual Cryptography on MPEG Layer III Bit-Streams"; IEEE Transactions on Consumer Electronics, Vol. 48 No. 4; November, 2002
• Vasiltsov; Karpinxskyy; Sagan; "Development of VHDL-Based Core with Embedded Steganography Function"; Lviv-Slasko, Ukraine; February, 2003