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Source privacy plays a key role in communication infrastructure protection. It is a critical security requirement for many mission critical communications. This is especially true for Mobile Ad hoc NETworks (MANETs) due to node mobility and lack of physical protection. Existing cryptosystem-based techniques and broadcasting-based techniques cannot be easily adapted to MANET because of their extensive cryptographic computation and/or large communication overhead. In this paper, the authors first propose a novel unconditionally secure Source Anonymous Message Authentication Scheme (SAMAS). This scheme enables message sender to transmit messages without relying on any trusted third parties. While providing source privacy, the proposed scheme can also provide message content authenticity.
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