Efficient Noise-Tolerant Message Authentication Codes Using Direct Sequence Spread Spectrum Technique

We present a new scheme to reduce the communications requirements for sending noise-tolerant message authentication codes (NTMACs), by sending the NTMAC's over direct sequence spread spectrum wireless channels. We greatly reduce the number of chips required by replacing each sub-MAC with a chip sequence (sub-tag) considered as a whole, while all advantages of the original NTMAC are retained.