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The following message protection mechanisms are described in this chapter: protection against eavesdropping (by employing encryption algorithms) and protection against message tampering (by employing message digest algorithms). The protection can be applied at various levels of granularity and to different protocol layers. At the transport layer, you have the option of applying protection to the entire contents of the message; while at the SOAP layer, you have the option of applying protection to various parts of the message (bodies, headers, or attachments).
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