On Tuesday,2009-08-18, at 19:45 , David-Sarah Hopwood wrote: > For off-line backup, the security property I want is that I can > perform backups, which do not overwrite any information, using a > key that is stored on-line, but need a separate key (that cannot be > derived from the first) to retrieve the data as it existed on a > given date.
That is a very interesting desideratum. It requires an "append-only" property that we've talked about but haven't implemented, and I think it requires public key encryption. Would you please open a ticket saying you want this? (The contents of your message to the list would be fine as the initial comment in the ticket.) Regards, Zooko _______________________________________________ tahoe-dev mailing list [email protected] http://allmydata.org/cgi-bin/mailman/listinfo/tahoe-dev
