Best practice for periodic key change?

Jerome Baum jerome at
Sun May 8 03:13:00 CEST 2011

On Sat, May 7, 2011 at 23:56, Robert J. Hansen <rjh at> wrote:

> On 05/07/2011 02:49 PM, MFPA wrote:
> > What is to stop that scanned bitmap of a person's signature being
> > applied to a document the individual has no knowledge about?
> Nothing.  That's the nature of physical signatures.

I was talking about a digital signature though.

MFPA: I agree about the signature being very weak. I am just repeating what
German law says. This is from some brochure brought out by the BSI. It's
also quite a right interpretation -- they aren't assigning much strength to
it, it's what we have advanced and qualified electronic signatures for. The
bitmap scan is still digital though, and it is a signature. So, it is an
electronic signature. Makes sense, just don't accept it in court.

Jerome Baum

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