{"type":"rich","version":"1.0","author_name":"npub1m230cem2yh3mtdzkg32qhj73uytgkyg5ylxsu083n3tpjnajxx4qqa2np2","author_url":"https://nostr.ae/npub1m230cem2yh3mtdzkg32qhj73uytgkyg5ylxsu083n3tpjnajxx4qqa2np2","provider_name":"njump","provider_url":"https://nostr.ae","html":"📅 Original date posted:2015-08-21\n📝 Original message:On Fri, Aug 21, 2015 at 01:48:23AM -0400, Jeff Garzik via bitcoin-dev wrote:\n\u003e If this is widely deployed + enabled, what is the impact to current wallets\n\u003e in use?\n\nSee my comment on the recently-opened issue, reproduced below. In short,\nnot all that much, especially if we adopt my suggestion of having the\nCore implementation accept and respond to bloom filter requests from\nnon-upgraded clients regardless of whether or not NODE_BLOOM was set\nuntil some fixed upgrade deadline in the future.\n\n\n    Note that since the last time NODE_BLOOM was proposed, the landcape for\n    (lite-)SPV clients has changed significantly in a few key ways:\n\n    1) @mikehearn's [Cartographer](https://github.com/mikehearn/httpseed)\n    seed protocol has been created and deployed in production to allow\n    (lite-)SPV clients to find nodes supporting arbitrary service bits,\n    notable NODE_GETUTXOs.\n\n    2) Bloom filter usage has declined significantly, as lite-SPV clients\n    are moving towards using centralized, trusted, servers run by the wallet\n    authors. For instance\n    [Mycelium](https://github.com/mycelium-com/wallet),\n    [GreenBits](https://github.com/greenaddress/GreenBits),\n    [AirBitz](https://www.reddit.com/r/Bitcoin/comments/3etohn/whats_wrong_with_breadwallet/ctirou5),\n    and [Electrum](https://electrum.org/#home) all fall in this category.\n\n    3) Bloom filters [have been found](http://eprint.iacr.org/2014/763) to\n    have severe privacy issues, offering essentially no privacy at all.\n    Under many threat models a small number of trusted servers pose less\n    privacy security risk than connecting to random, sybil-attackable, peers\n    using unencrypted connections and giving those peers very accurate\n    wallet contents information.\n\n    4) Finally, Bloom filters still have [unsolved DoS attack\n    issues](https://www.reddit.com/r/Bitcoin/comments/3hjak7/the_hard_work_of_core_devs_not_xt_makes_bitcoin/cu9xntf?context=3),\n    that will get significantly worse under upcoming blocksize increase\n    proposals.\n\n    Re: service bit identifier, I'd just pick 1\u003c\u003c3\n\n    -https://github.com/bitcoin/bitcoin/issues/6578#issuecomment-133226943\n\n-- \n'peter'[:-1]@petertodd.org\n00000000000000000402fe6fb9ad613c93e12bddfc6ec02a2bd92f002050594d\n-------------- next part --------------\nA non-text attachment was scrubbed...\nName: signature.asc\nType: application/pgp-signature\nSize: 650 bytes\nDesc: Digital signature\nURL: \u003chttp://lists.linuxfoundation.org/pipermail/bitcoin-dev/attachments/20150820/18343e42/attachment.sig\u003e"}