> Do you see a way to protect at the row or field level?
Well, extract them by way of SQL statements, do the same
procedure with the extracted data+the extract script and
make sure you can extract the information later on.

But this goes against the idea of a digital notary. A
notary service' goal is to certify a certain status quo
at a given point in time. It is not the right tool for
preventing tampering with the in-use data at the
application level. Just as a justice-in-peace isn't
your factory security guard. Both serve the same
ultimate goal - protect that which is yours - but
they just ain't doing it the same way.

Karsten
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