Subject: Re: [bitcoin-dev] BIP Proposal: Compact Client Side Filtering for Light Clients

From: Adam Back <[email-masked]>
Date: Tue, 20 Jun 2017 18:20:53 +0100

Also Jonas Nick gave a fairly comprehensive presentation on privacy
leaks in bitcoin protocol including SPV and bloom query problem
specifics:

https://www.youtube.com/watch?v=HScK4pkDNds

Adam

On 20 June 2017 at 14:08, bfd--- via bitcoin-dev
<[email-masked]> wrote:
> On 2017-06-20 12:52, Tom Zander via bitcoin-dev wrote:
>>
>> Second, stating that a bloom filter is a "total loss of privacy" is
>> equally
>> baseless and doesn’t need debunking.
>>
>
> "On the Privacy Provisions of Bloom Filters in Lightweight Bitcoin Clients"
>
>> We show analytically and empirically that the reliance on Bloom filters
>> within existing SPV clients leaks considerable information about the
>> addresses of Bitcoin users. Our results show that an SPV client who uses a
>> modest number of Bitcoin addresses (e.g., < 20) risks revealing almost all
>> of his addresses.
>
>
> https://eprint.iacr.org/2014/763.pdf
>
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