Crypto, passwords

[Hal Murray]

> I have no idea how it's used in NTP. But I understand it's some kind of
> shared password? You should clearly look in how it's being used and if that
> actually makes sense. Maybe it needs more than just replacing the hash
> algorithm.

It appends a digest to the packet.  This digest covers the shared password, 
the body of the packet, and a 4 byte keyid.

Packets older than a few seconds are not interesting.


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