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Some security research in Mobile Ad Hoc NETworks (MANETs) and Wireless Sensor Networks (WSNs) is very closely related to cryptography. There are numerous security routing protocols and key management schemes that have been designed based on cryptographic techniques, such as public key infrastructures and identity-based cryptography. In fact, some of them are fully adapted to fit the network requirements on limited resources such as storage, CPU, and power limitations. For example, one way hash functions are used to construct disposable secret keys instead of choosing private key in public key infrastructure.
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