This looks like a prime application for this PIR library:
http://percy.sourceforge.net/apidocs/index.html

Eric Voskuil via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org>
schrieb am Do., 23. Juli 2015 um 02:07 Uhr:

> This is a good point. I didn't delve into the specifics of
> implementation due to the larger issues that I raised. Libbitcoin Server
> uses CurveZMQ, an implementation of CurveCP.
>
> http://curvecp.org
> http://curvezmq.org
> https://en.bitcoin.it/wiki/Libbitcoin_Server
>
> e
>
> On 07/22/2015 04:11 PM, gb via bitcoin-dev wrote:
> > Why RSA?
> >
> >>
> >> Here is an idea, inspired by TOR, on which I would like to have some
> >> feedback: We create an anonymous routing layer between Electrum servers
> >> and clients.
> >>
> >> * Each server S publishes a RSA public key, KS
> >> * Each client receives a list of available servers and their pubkeys
> >> * For each wallet address, addr_i, a client chooses a server S_i, and a
> >> RSA keypair (K_addr_i, k_addr_i)
> >> * The client creates a list of encrypted requests. Each request contains
> >> addr_i and K_addr_i, and is encrypted with the pubkey KS_i of S_i
> >> * The client chooses a main server M, and sends the list of encrypted
> >> requests to M
> >> * M dispatches the client's requests to the corresponding servers S_i
> >> (without the client's IP address.)
> >> * Each server decrypts the requests it receives, performs the request,
> >> and encrypts the result with K_addr_i
> >> * M receives encrypted responses, and forwards them to the client.
> >> * The client decrypts the encrypted response with k_addr_i
>
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>