Communication & Signal Processing
Message Authentication in Noisy Environments
- Multi-layered schemes in MIMO systems
- OFDM for Cooperative Networks
- Radar Imaging
- 50% Efficient Solar Cells
- Capacity optimization
- Channel coding for non-standard channels with memory
- Exploiting Diversity in Wireless Networks
- Image Compression
- Low-density generator matrix codes
- Message Authentication in Noisy Environments
- Multi-tone blue noise dithering
- Inverse Lithography
- Space-time/frequency coding for MIMO and cooperative communications systems
- Steganalysis of Digital Images and Videos
- Turbo-like codes for distributed source and joint source-channel coding
- Compressive sensing in imaging, sensor networks, and UWB radios
- Lossless Data Compression
Lisa Marvel, Army Research Laboratory
When one receives a message, how can one be sure the message comes from the purported sender, and how can one be sure the message has not been deliberately altered in transit? This is the realm of message authentication. Conventional solutions use a secret key and compute a signature of the message. This signature is attached to the message and both are transmitted. The receiver then computes a signature (using the same secret key) and compares the computed and received signatures. If they match the message is accepted as authentic; if they do not, the message is rejected and often retransmitted.
Unfortunately, conventional methods are ill suited for noisy wireless channels that may introduce a small number of random bit errors. We have introduced a series of "noise tolerant message authentication codes" that can identify these bit errors and allow the user to decide whether or not to accept the message.
These new message authentication codes also have some important cryptographic properties, principally they may not be vulnerable to recent attacks on conventional codes.
Our current work is on quantifying the performance of these new codes, on extending them to various application scenarios, and proving cryptographic properties.
"The CRC-NTMAC for Noisy Message Authentication," Yu Liu and C. G. Boncelet Jr., IEEE Trans. on Information Forensics and Security, December 2006.
"The NTMAC for Authentication of Noisy Messages," C. G. Boncelet Jr., IEEE Trans. on Information Forensics and Security, March 2006.
"The BCH-NTMAC for Noisy Message Authentication," Y. Liu and C. G. Boncelet Jr., Proceedings of the 2006 CISS, Mar. 2006.
"Efficient Noise-Tolerant Message Authentication Codes Using Direct Sequence Spread Spectrum Technique," S. Xiao and C. G. Boncelet Jr., Proceedings of the 2006 CISS, Mar. 2006.