[messaging] Two-party consensual file access

Ben Laurie ben at links.org
Thu Mar 28 15:36:42 PDT 2019

Who encrypted this file?

On Thu, 28 Mar 2019 at 13:48, B Da Bahia <bidabahia at gmail.com> wrote:

> Hello list,
> I'm looking for a cryptographic algorithm to solve the following problem:
> Alice and Bob (untrusting partners) want to cooperate to open an encrypted
> file located at either one's computer. No party should be able to open it
> without the other party's consent. No trusted third parties are allowed to
> intervene in the protocol.
> Could anyone provide useful references to explore?
> thanks in advance!
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