October 2002
Intermediate to advanced
344 pages
10h 17m
English
Content preview from The ABCs of TCP/IP, 2nd Edition
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Enhancing Security
237
Sequence Number Field
This 32-bit field also functions in the same manner as described for AH.
Payload Data Field
The Payload Data field is not actually part of the ESP header or trailer. It
represents instead the encrypted payload whose encryption method was
selected during the security association process.
Padding Field
Because most encryption algorithms operate on an integral number of blocks,
a Padding field permits the payload to be extended to accommodate a
particular encryption algorithm. Because padding may not be necessary if the
algorithm operates on a byte basis or if the payload ends on a block boundary,
the Padding ...
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