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| author | Dmitry Petukhov <dp@simplexum.com> | 2019-08-08 17:05:05 +0500 |
|---|---|---|
| committer | bitcoindev <bitcoindev@gnusha.org> | 2019-08-08 12:03:51 +0000 |
| commit | 7c9d451a36c04e198e2094c7f1d42ddcd1cf7d61 (patch) | |
| tree | 84eac4f80cf18f3e61e3d5230e662f7b8c589c08 | |
| parent | 95d3450ded55dd450fe179510c607812910d5dbc (diff) | |
| download | pi-bitcoindev-7c9d451a36c04e198e2094c7f1d42ddcd1cf7d61.tar.gz pi-bitcoindev-7c9d451a36c04e198e2094c7f1d42ddcd1cf7d61.zip | |
Re: [bitcoin-dev] Improving JoinMarket's resistance to sybil attacks using fidelity bonds
| -rw-r--r-- | 56/7e424a7c49b77bb6dd45196cae8bbd571fed9a | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/56/7e424a7c49b77bb6dd45196cae8bbd571fed9a b/56/7e424a7c49b77bb6dd45196cae8bbd571fed9a new file mode 100644 index 000000000..8acb1b421 --- /dev/null +++ b/56/7e424a7c49b77bb6dd45196cae8bbd571fed9a @@ -0,0 +1,91 @@ +Return-Path: <dp@simplexum.com> +Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org + [172.17.192.35]) + by mail.linuxfoundation.org (Postfix) with ESMTPS id 8CB3CF42 + for <bitcoin-dev@lists.linuxfoundation.org>; + Thu, 8 Aug 2019 12:03:51 +0000 (UTC) +X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 +Received: from mail.ruggedbytes.com (mail.ruggedbytes.com [88.99.30.248]) + by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 0AF0E14D + for <bitcoin-dev@lists.linuxfoundation.org>; + Thu, 8 Aug 2019 12:03:50 +0000 (UTC) +Received: from mail.ruggedbytes.com (localhost [127.0.0.1]) + by mail.ruggedbytes.com (Postfix) with ESMTPS id 6DA682600524; + Thu, 8 Aug 2019 12:03:48 +0000 (UTC) +DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=simplexum.com; + s=mail; t=1565265828; + bh=NBmilLi0j/jQ8d7U9FpqqouxYcEXrtO42iSmBNYgoBo=; + h=Date:From:To:Cc:Subject:In-Reply-To:References; + b=DsLCGedsrA9y8zI86IHR7C7oZAIL7nJ6kUjVuOo+MqQS9o0Q2OC2g6dt4Ald6SPcH + mq9/tGMrTQa78aE7oBSNAUNhxSxrb97sKBge2s3gsSL/VJjdAUU/sZx3S5zz70DINA + sqfKXLgwXlS6V1RJULuxH2DYTlAcrgky453+md4o= +Date: Thu, 8 Aug 2019 17:05:05 +0500 +From: Dmitry Petukhov <dp@simplexum.com> +To: Dmitry Petukhov via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> +Message-ID: <20190808170505.4169585f@simplexum.com> +In-Reply-To: <20190807201017.2a03b971@simplexum.com> +References: <985792b1-e7aa-677b-a7a1-6a5f672da884@riseup.net> + <94534006-D560-4C90-9D5D-A3A64B698518@gmail.com> + <20190726143738.0be561da@simplexum.com> + <3c328312-2bdd-60d9-7425-8db620d09abb@riseup.net> + <20190731205018.10ed4302@simplexum.com> + <ae32dcbb-c950-3b3f-22b9-d152d6b221cb@riseup.net> + <20190802145057.7b81c597@simplexum.com> + <ad501873-8912-765e-8df5-c9b0451fcd0a@riseup.net> + <20190807015541.3d8aa849@simplexum.com> + <20190807023742.73750ba3@simplexum.com> + <483af6d0-ac5a-0e22-da29-af0be5196c15@riseup.net> + <20190807201017.2a03b971@simplexum.com> +Organization: simplexum.com +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: quoted-printable +X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, + DKIM_VALID, DKIM_VALID_AU, + TVD_PH_BODY_ACCOUNTS_PRE autolearn=ham version=3.3.1 +X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on + smtp1.linux-foundation.org +X-Mailman-Approved-At: Thu, 08 Aug 2019 12:16:03 +0000 +Subject: Re: [bitcoin-dev] Improving JoinMarket's resistance to sybil + attacks using fidelity bonds +X-BeenThere: bitcoin-dev@lists.linuxfoundation.org +X-Mailman-Version: 2.1.12 +Precedence: list +List-Id: Bitcoin Protocol Discussion <bitcoin-dev.lists.linuxfoundation.org> +List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/bitcoin-dev>, + <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=unsubscribe> +List-Archive: <http://lists.linuxfoundation.org/pipermail/bitcoin-dev/> +List-Post: <mailto:bitcoin-dev@lists.linuxfoundation.org> +List-Help: <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=help> +List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev>, + <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=subscribe> +X-List-Received-Date: Thu, 08 Aug 2019 12:03:51 -0000 + +=D0=92 Wed, 7 Aug 2019 20:10:17 +0500 +Dmitry Petukhov via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> +wrote: + +> In shared ownership rent scheme that ZmnSCPxj described in [1], +> the 'TXO rentier' has a signed timelocked 'backout' transaction that +> spends the locked TXO, and assigns the reward to rentier. +>=20 +> If we say that any transaction that spends any TXO in the bond +> (ignoring the timelock), invalidates the bond when presented to +> takers, then TXO rentier can revoke the bond by simply +> publishing this transaction (not to the blockchain, but by some other +> means so that takers can receive it). +>=20 +> The transaction validity can be verified, with the relaxed rules that +> ignores the timelock. After it is verified, takers mark the whole +> bond as revoked and will not consider it when chosing makers. + +The backout transaction might not be timelocked itself, but can depend +on another timelocked transaction (made specifically to avoid the +backout transaction be timelocked). That extra transaction will need to +be broadcast before the backout transaction. + +To account for that possibility, takers would need to either use more +relaxed verification rules (do not check if the inputs of the 'snitch +transaction' exist), or would need to check the whole package of +dependent transactions in which the last one spends the bond.=20 + |