[Barker, Elaine B.] NIST Publication Announcements
Stephan Neuhaus
neuhaus at st.cs.uni-sb.de
Thu Oct 1 11:07:46 EDT 2009
On Oct 1, 2009, at 16:46, Perry E. Metzger wrote:
> It is also completely impossible to prove you've deleted a
> record. Someone who can read the record can always make a copy of
> it. Cryptography can't fix the DRM problem.
Sorry, I should have clarified that. We don't want to verify that Bob
has in fact deleted the patient record, we just want to verify whether
Bob *claims* to have deleted the patient record *within the time span
given*. If Alice later finds out that Bob has lied, she will have this
signed claim, with which she can take him to court.
Best,
Stephan
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