[liberationtech] Auto expiring document/files & 'rights to be forgotten'

[Tom Ritter]

There was a technology (that didn't work for realistic threat models)
that took a document and split among a number of servers.  Over time,
these pieces would decay and be removed until you were no longer able
to reassemble the document.  That sounds similar to what you're after.

It doesn't work for all the reasons already mentioned, but it was a
concrete open source implementation of an attempt.  If only I could
remember its name...

-tom