RE: Entity tags as an HTTP covert channel

By combining this with partial downloads using Byte-range and 206
headers, randomizing filenames in the request (using a dictionary) and
actual
files containing semi-random content being returned, this can be made
to look very innocuous in the proxy's logs.

By using randomized Byte-range's you'll also be able to fool many Web
Application Firewalls, and IDS systems flagging on response signature
based vulnerabilities.

Regards,

Robert Auger
SPI Labs
rauger@_@_@xxxxxxxxxxxxxxx
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