Tripwire style checking using apt/dpkg (security)

[Stephen Birch <steve_debian@ironmountainsystems.com>]

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Since apt/dpkg has access to the CRC of every binary installed on a 
running system, it seems to make sense that the binaries of a running 
machine could be verified to make sure there are no trojan horses on 
the machine.

Does anyone know if a tool like this exists already?

Steve
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