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The high-level contribution of this chapter is the design of a framework for Session Mobility as a Service (SMaaS) for cloud computing environments. The SMaaS framework is suitable for thin clients as it requires a client to maintain only one active TCP session at any time with a server in the cloud. Once the client finds a suitable server to start or continue a session (from its previous state), the client and server establish an IPSec Security Association (IPSec SA) and all session-pertaining messages, including the Session Handoff messages, are exchanged in a secure fashion, leaving no scope for any spoofing attacks. The session transfer is triggered by the server when it starts observing an increase and variations in the round trip time of the acknowledgement packets received from the client and considers this as indication of an impending congestion on the path to the client. Upon session transfer, a client can continue obtaining the service from where it was left off (with the previous server), rather than starting from scratch. The SMaaS Gateway Server and the Servers in the cloud coordinate each other through a secure SMaaS Ticket (containing the authentication information for the user, client machine, and the session state) that can be encrypted and decrypted only by these servers. This chapter presents a detailed design of the SMaaS framework and a qualitative comparison with other related schemes (like Kerberos, anycasting as well as the sequential, parallel/mirror server, and peer-to-peer file transfer protocols).
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- Design of a Secure Framework for Session Mobility as a Service in Cloud Computing Environment
- Chapter 27