can apt check multiple package sums during install ?

["Dr. David Alan Gilbert" <gilbertd@treblig.org>]

Hi,
  Given the recent incidence of trojaning of sources of some
applications, I wondered whether it was possible to get apt-get to
download the list of package checksums from multiple debian ftp servers
and only install a package if the sum matched in package files from
multiple servers, thus reducing the chances that someone could replace a
package on one server and modify its corresponding sum.

Thoughts oh great one ?

Dave
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