Nelson B wrote:
> One needs a trusted source AND a trusted channel to that source.

Yes, although there's also a "herd immunity" feature, as I discuss below.

At the moment, spotting things like the Wordpress download tarball 
trojan took quite a while, because someone had to bother to check the 
code against the published MD5sum manually - and who does that? Maybe 
just you :-)

If Link Fingerprints were being used, 15% or more of all downloads would 
be checked automatically. The problem would have been spotted much, much 
sooner. So even people without LF-supporting clients, and people against 
whom an MITM is being attempted, get an indirect benefit.

Gerv
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