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Abstract:
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In vehicular adhoc network (VANET), applications are involved with sensitive and secret information. We address a location-based encryption method that not only ensures messages confidentiality but also authenticates identity and location of communication peers. The authentication of location means that a message can only decrypted by the receiver which is ?physically? present inside a decryption region that is specified by location, time and speed. A practical mapping function which converts location, time and speed into a unique lock key is proposed. The determination of the decryption region is addressed in two steps: predicting and updating. The proposed method evaluated by simulations is efficient and secure.
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