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From: adiabat <rx@awsomnet.org>
To: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] BIP Proposal: Compact Client Side Filtering for Light Clients
Date: Mon, 19 Jun 2017 12:36:41 -0400	[thread overview]
Message-ID: <CAKEeUhha8FMYqO79veAyZyg0Cc6S-_1a4=k4=6WdC7+Juk1A1Q@mail.gmail.com> (raw)
In-Reply-To: <B27FF856-9281-479C-BFE2-D594F46C5C44@jonasschnelli.ch>

This has been brought up several times in the past, and I agree with
Jonas' comments about users being unaware of the privacy losses due to
BIP37.  One thing also mentioned before but not int he current thread
is that the entire concept of SPV is not applicable to unconfirmed
transactions.  SPV uses the fact that miners have committed to a
transaction with work to give the user an assurance that the
transaction is valid; if the transaction were invalid, it would be
costly for the miner to include it in a block with valid work.

Transactions in the mempool have no such assurance, and are costlessly
forgeable by anyone, including your ISP.  I wasn't involved in any
debate over BIP37 when it was being written up, so I don't know how
mempool filtering got in, but it never made any sense to me.  The fact
that lots of lite clients are using this is a problem as it gives
false assurance to users that there is a valid but yet-to-be-confirmed
transaction sending them money.

-Tadge


  reply	other threads:[~2017-06-19 16:36 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-01 19:01 [bitcoin-dev] BIP Proposal: Compact Client Side Filtering for Light Clients Olaoluwa Osuntokun
2017-06-01 21:00 ` Eric Lombrozo
2017-06-01 21:33 ` Matt Corallo
2017-06-01 22:10   ` Olaoluwa Osuntokun
2017-06-02  2:15     ` Chris
2017-06-02  2:28       ` Gregory Maxwell
2017-06-02  3:35         ` Alex Akselrod
2017-06-02 16:07         ` Chris Pacia
2017-06-02  4:49 ` Olaoluwa Osuntokun
2017-06-09  3:59   ` Olaoluwa Osuntokun
2017-11-09 23:44     ` Olaoluwa Osuntokun
2017-06-02  6:00 ` Karl Johan Alm
     [not found]   ` <CAE0pnx+RRAP269VeWAcxKbrcS9qX4LS8_6nY_js8X5NtQ22t_A@mail.gmail.com>
     [not found]     ` <CAE0pnxLKYnwHnktTqW949s1AA9uK=6WnVYWmRoau8B1SszzYEg@mail.gmail.com>
     [not found]       ` <CAE0pnxJxHYQ4+2pt3tt=1WZ0-K0vDxGB4KBXY+R=WfktMmATwA@mail.gmail.com>
2017-06-02 17:55         ` Alex Akselrod
2017-06-05  2:06           ` Karl Johan Alm
2017-06-09  3:03             ` Olaoluwa Osuntokun
2017-06-07 21:41 ` Gregory Maxwell
2017-06-09  3:42   ` Olaoluwa Osuntokun
2017-06-09  4:47     ` Olaoluwa Osuntokun
2017-06-08  9:50 ` Tomas
2017-06-09  3:50   ` Olaoluwa Osuntokun
2017-06-09  8:26     ` Tomas
2017-06-19 11:58 ` Andreas Schildbach
2017-06-19 12:26   ` bfd
2017-06-19 15:15     ` Tom Zander
2017-06-19 15:49       ` Jonas Schnelli
2017-06-19 15:59         ` Andreas Schildbach
2017-06-19 16:22           ` Jonas Schnelli
2017-06-19 16:36             ` adiabat [this message]
2017-06-19 20:49               ` Andreas Schildbach
2017-06-20  7:03             ` Eric Voskuil
2017-06-19 16:07         ` Tom Zander
2017-06-19 16:30           ` Jonas Schnelli
2017-06-19 16:38             ` Tom Zander
2017-06-19 15:43     ` Andreas Schildbach
2017-06-19 16:10       ` Jonas Schnelli
2017-06-19 22:41     ` Gregory Maxwell
2017-06-20  9:52       ` Tom Zander
2017-06-20 13:08         ` bfd
2017-06-20 17:20           ` Adam Back

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