bfd at cock.lu [ARCHIVE] on Nostr: 📅 Original date posted:2017-04-01 📝 Original message:On 2017-02-17 11:28, Chris ...
📅 Original date posted:2017-04-01
📝 Original message:On 2017-02-17 11:28, Chris Belcher via bitcoin-dev wrote:
> I think this committed bloom filter idea is very good and much better
> than bip37, but for good privacy for when bitcoin is used often still
> requires certain behavior namely downloading blocks
> from many different peers with new tor circuits.
>
> Note that I've been dealing with counting transaction subgraphs but
> actually finding them from blocks might also be computationally
> infeasible. Although a Bayesian approach worked very
> well for similar transaction subgraph linking
> [https://arxiv.org/pdf/1612.06747v3.pdf]
>
> It would also be interesting to analyze what information a spy can get
> if they are missing some blocks that the wallet downloaded.
>
> For the long term, private and high-volume bitcoin use will be best
> served by off-chain transactions. They will probably be a huge win just
> because the large and public blockchain is such a non-private
> way of doing things.
>
Thank you for the analysis, this generally matches my views about the
properties offered by the system.
I've generally developed the opinion that BIP37 is effectively unused
by all but a very small number of wallets and services now, setting up
sinkhole nodes in the network to monitor `filterload` commands seems
to back that up.
📝 Original message:On 2017-02-17 11:28, Chris Belcher via bitcoin-dev wrote:
> I think this committed bloom filter idea is very good and much better
> than bip37, but for good privacy for when bitcoin is used often still
> requires certain behavior namely downloading blocks
> from many different peers with new tor circuits.
>
> Note that I've been dealing with counting transaction subgraphs but
> actually finding them from blocks might also be computationally
> infeasible. Although a Bayesian approach worked very
> well for similar transaction subgraph linking
> [https://arxiv.org/pdf/1612.06747v3.pdf]
>
> It would also be interesting to analyze what information a spy can get
> if they are missing some blocks that the wallet downloaded.
>
> For the long term, private and high-volume bitcoin use will be best
> served by off-chain transactions. They will probably be a huge win just
> because the large and public blockchain is such a non-private
> way of doing things.
>
Thank you for the analysis, this generally matches my views about the
properties offered by the system.
I've generally developed the opinion that BIP37 is effectively unused
by all but a very small number of wallets and services now, setting up
sinkhole nodes in the network to monitor `filterload` commands seems
to back that up.