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Vehicular ad hoc networks (VANETs) are used to collect and aggregate real-time speed and position information on individual vehicles to optimize signal control at traffic intersections. VANET can be used to group vehicles into approximately equal-sized platoons, which can then be scheduled using OJF. Greedy forwarding algorithm is proposed to use in the traffic management as it offer the better transfer. Vehicle to infrastructure method is used to transfer the message from the platoon to the vehicle thus increases the safety. The road block information is transfer from platoon to V to I and from one V to I it is transfer to another.Greedy Forwarding algorithm is used to forwarded message to the neighboring node which is "closest" to the destination. In this paper Greedy Forwarding is used to increase the delivery rate and throughput. This algorithm is also used to reduce the load traffic. Greedy algorithm has computationally efficient and can find the error in early stage. Under heavy vehicular traffic load, the greedy algorithm performs the same as the platooning algorithm but still produces low delays, and high throughput. Index Terms-VANET (Vehicular ad hoc networks), GreedyAlgorithm, V to I, I to V.

Cloud architecture is used for maintaining the personal health record and provide symptoms based treatment to the patients. The details of a patient need to be stored in a secured manner. It is to create a cloud storage server for long term storage over the internet. The storage server will act as a database server. Uploaded data stored in the cloud server through proxy re-encryption method. A secured threshold proxy re-encryption server and integrates it with a decentralized erasure code such that a secure distributed storage system. To generate proxy re-encryption key for one-time data access. A proxy server will be created virtually for one time data access. We can achieve the symptoms based treatment by secure Personal Health Record in cloud storage when applying the proposed encryption algorithm.

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