[Cryptography] Eudaemon: A peer-to-peer electronic identity system

[Nico Williams]

On Tue, Apr 25, 2023 at 10:10:02PM +0200, Ralf Senderek wrote:
> On Mon, 24 Apr 2023, Agathos wrote:
> > > What do you envision is in the "identity and associated data" ?
> > 
> > Any data that is important to yourself and/or your peers. Direct
> > messages, group messages, key backups, arbitrary data backups, secrets,
> > personal attributes, trust topology and even media. Though I would not
> > recommend dumping an entire family video album on the current prototype
> > system.
> 
> So all this data is committed to the personal blockchain in clear text?
> Do you really think this is a good idea?

The data that goes into the blockchain has to be public -if the
blockchain is public anyways-, but that data can be ciphertext.

So what's the use of publishing a blockchain of ciphertext?  Well, you
can use that commit to plaintext to be revealed later by revealing the
decryption key(s).  And you can use this to share data with others who
have the decryption keys already.