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Microsoft® Windows® Security Resource Kit, Second Edition by The Microsoft Security Team, Brian Komar, Ben Smith

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Using IPSec

By its design, TCP/IP is an open protocol created to connect heterogeneous computing environments with the least amount of overhead possible. As is often the case, interoperability and performance design goals do not generally result in security—and TCP/IP is no exception to this. TCP/IP provides no native mechanism for the confidentiality or integrity of packets. To secure TCP/IP, you can implement IP Security. IPSec implements encryption and authenticity at a lower level in the TCP/IP stack than application-layer protocols such as Secure Sockets Layer (SSL) and Transport Layer Security (TLS). Because the protection process takes place lower in the TCP/IP stack, IPSec protection is transparent to applications. IPSec is a well-defined, ...

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