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Secure Web services [Sh03]
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- SSL is designed to provide point-to-point security, which falls short for Web services because we need end-to-end security, where multiple intermediary nodes could exist between the two endpoints
- SSL secures communication at transport level rather than at message level. As a result, messages are protected only while in transit on the wire. For example, sensitive data on your hard disk drive is not generally protected unless you apply a proprietary encryption technology.
- HTTPS in its current form does not support nonrepudiation well. Nonrepudiation is critical for business Web services and, for that matter, any business transaction.
- SSL does not provide element-wise signing and encryption. (Again, that is due to the fact that SSL is a transport-level security scheme as opposed to a message-level scheme.)
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