00:03:48 justanotheruser1 has joined #bitcoin-wizards 00:04:39 justanotheruser has quit 00:06:13 rdymac has quit 00:06:29 rdymac has joined #bitcoin-wizards 00:09:13 rdymac has quit 00:12:19 justanotheruser has joined #bitcoin-wizards 00:12:59 rdymac has joined #bitcoin-wizards 00:13:26 justanotheruser1 has quit 00:15:57 tromp_ has joined #bitcoin-wizards 00:20:41 justanotheruser has quit 00:21:33 justanotheruser has joined #bitcoin-wizards 00:22:47 jgarzik: speaking of which: http://lunarinitiatives.com/lunarworkshops.com/home 00:22:51 to the moon! 00:23:24 (there's a lunar cubes workshop there) 00:30:46 justanotheruser has quit 00:36:19 Shibe_tabsa has quit 00:46:23 justanotheruser has joined #bitcoin-wizards 00:55:39 justanotheruser has quit 00:55:57 mappum has quit 00:55:58 justanotheruser has joined #bitcoin-wizards 01:03:43 is it possible to encrypt to 1-of-N keys? 01:04:14 justanotheruser1 has joined #bitcoin-wizards 01:05:10 justanotheruser has quit 01:05:58 e.g. to do ECDH with a combined key requiring 1-of-N keys to complete the protocol 01:13:10 justanotheruser has joined #bitcoin-wizards 01:13:51 justanotheruser1 has quit 01:21:55 justanotheruser1 has joined #bitcoin-wizards 01:22:26 justanotheruser has quit 01:28:53 DougieBot5000 has quit 01:30:16 justanotheruser1 has quit 01:32:23 justanotheruser has joined #bitcoin-wizards 01:32:35 Krellan_ has joined #bitcoin-wizards 01:36:47 justanotheruser has quit 01:36:56 https://www.eff.org/deeplinks/2014/02/eff-challenges-new-jersey-subpoena-issued-mit-student-bitcoin-developers :-/ 01:47:14 <.<. sounds like eff has a pretty solid case tho 01:47:26 * andytoshi is formally operating from canada from now on, even so 01:54:36 justanotheruser has joined #bitcoin-wizards 02:02:51 orperelman has quit 02:05:58 * maaku needs the protection of a canadian shell company... 02:07:10 <31NAAEFTQ> 31NAAEFTQ is now known as IOI_ 02:07:56 jtimon has quit 02:10:59 orperelman has joined #bitcoin-wizards 02:18:13 mappum has 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#bitcoin-wizards 09:40:13 <_ingsoc> _ingsoc has quit 09:40:13 <_ingsoc> _ingsoc has joined #bitcoin-wizards 10:07:07 RoboTeddy has joined #bitcoin-wizards 10:07:52 oooooo has quit 10:09:03 hnz has quit 10:11:00 adam3us has joined #bitcoin-wizards 10:12:50 hnz has joined #bitcoin-wizards 10:15:41 mappum has joined #bitcoin-wizards 10:26:49 go1111111 has quit 10:31:22 maaku: 1 of n encryption. at least inefficiently yes just encrypt a random sym key for each of n derived using respective ECDH pub keys. directly maybe. i presume you need non-interactively otherwise the interactive 3 party / n-party DH could be used. perhaps the non-interactive weil-pairing could be another way. otherwise as a starting point A=rG, B=m+rQ decrypt m=B-dA A is random. 10:32:20 TD has joined #bitcoin-wizards 10:33:48 maaku: alternatively send 1 of n secret shared encoding of m using k=dQ=eP from each of the n recipients? using k as the missing coefficients in n-1 equations or something like that 10:34:03 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12:25:13 then you can (up to not independently validatable but spv-proof like security) respend committed tx without revealing full tx history. a spent committed coin is valid to the recipient just by presence of coin in 6-confirms block and key to decrypt forward (but not backward) given to the recipient, and repeat. 12:26:52 kinda weak, but i thought it an interesting thought experiment. this form of spv is weaker because no history past 6 blocks is considered by miners. bitcoin does full history back to genesis or to snapshot. 12:28:43 ielo has joined #bitcoin-wizards 12:43:23 c--O-O has joined #bitcoin-wizards 12:47:46 orperelman has quit 12:49:39 justanotheruser1 has quit 12:54:36 iwilcox has joined #bitcoin-wizards 12:54:52 samson_ has joined #bitcoin-wizards 12:55:00 iwilcox has left #bitcoin-wizards 13:00:57 <_ingsoc> _ingsoc has quit 13:01:12 mappum has joined #bitcoin-wizards 13:04:11 nsh has joined #bitcoin-wizards 13:05:36 justanotheruser has joined #bitcoin-wizards 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has joined #bitcoin-wizards 14:37:37 nsh has quit 14:37:37 nsh has joined #bitcoin-wizards 14:37:42 andytoshi has joined #bitcoin-wizards 14:55:19 Shibe_tabsa has quit 15:11:26 <_ingsoc> _ingsoc has joined #bitcoin-wizards 15:11:50 <_ingsoc> _ingsoc is now known as Guest26345 15:35:47 samson_ has quit 15:36:31 samson_ has joined #bitcoin-wizards 15:41:44 DougieBot5000 has joined #bitcoin-wizards 15:47:10 adam3us: yes, it'd be non-interactive. the use case is group communication for coinjoin messages 15:47:50 the offer is broadcast in plaintext, and has both a NetAddr (IP/Tor service + port) and public key 15:48:21 nsh has quit 15:48:29 I was wondering if you could combine the public keys into an 1-of-N construction, and encrypt the session key to that 15:49:08 just as a matter of efficiency, so you don't have to separately do ECDH and symmetric encryption for each participant 16:00:05 andytoshi has quit 16:04:21 ielo has quit 16:09:45 Shibe_tabsa has joined #bitcoin-wizards 16:14:26 maaku: not a huge help but ECIES would work, eg k=d*Q=e*G, c=m+k 16:14:43 jgarzik has joined #bitcoin-wizards 16:14:43 jgarzik has quit 16:14:43 jgarzik has joined #bitcoin-wizards 16:15:36 maaku: one 256-bit ciphertext per recipient, if the Q, P are already known (should be k=d*Q=e*P above) 16:19:03 Guest26345 has quit 16:19:42 <_ingsoc> _ingsoc has joined #bitcoin-wizards 16:20:04 <_ingsoc> _ingsoc has quit 16:20:04 <_ingsoc> _ingsoc has joined #bitcoin-wizards 16:20:23 samson_ has quit 16:21:14 orperelman has joined #bitcoin-wizards 16:30:37 nsh has joined #bitcoin-wizards 16:36:58 c0rw1n has quit 16:37:00 nsh has quit 16:49:42 samson_ has joined #bitcoin-wizards 16:50:15 adam3us has quit 16:51:08 adam3us has joined #bitcoin-wizards 16:52:31 ghtdak has joined #bitcoin-wizards 17:06:43 andytoshi has joined #bitcoin-wizards 17:57:22 nsh has joined #bitcoin-wizards 17:59:36 rdymac has quit 18:04:29 rdymac has joined #bitcoin-wizards 18:29:49 fractastical has joined #bitcoin-wizards 18:32:54 mappum has joined #bitcoin-wizards 18:41:20 mappum has quit 18:42:11 mappum has joined #bitcoin-wizards 19:00:14 Mikalv has quit 19:01:50 Mikalv has joined #bitcoin-wizards 19:16:17 mappum has quit 19:19:56 orperelman has quit 19:21:12 orperelman has joined #bitcoin-wizards 19:22:18 TD has quit 19:24:21 mappum has joined #bitcoin-wizards 19:24:35 mappum has quit 19:28:24 Luke-Jr has quit 19:28:32 Luke-Jr has joined #bitcoin-wizards 19:31:20 mappum has joined #bitcoin-wizards 19:32:46 adam3us has quit 19:33:15 mappum has quit 19:49:59 adam3us has joined #bitcoin-wizards 19:58:01 Ursium_ has joined #bitcoin-wizards 19:59:19 Ursium has quit 19:59:25 adam3us: ok that would save from having to encrypt multiple times (as I presume you don't leak any information from reusing the same session key) 19:59:47 but it'd be nice to eliminate the more expensive EC operations 20:06:56 adam3us has quit 20:08:58 adam3us has joined #bitcoin-wizards 20:10:37 maaku: random cpu should be able to do tens of thousands of them per second in any case. 20:24:39 adam3us has quit 20:26:34 yeah my concern was more mobile power usage, but I suppose that is trivial compared with what it costs to broadcast these messages anyway 20:32:13 adam3us has joined #bitcoin-wizards 20:43:25 go1111111 has joined #bitcoin-wizards 20:45:50 adam3us has quit 20:48:04 fractastical has quit 20:48:08 adam3us has joined #bitcoin-wizards 20:55:54 mappum has joined #bitcoin-wizards 20:57:41 adam3us has quit 21:00:52 mappum has quit 21:01:08 mappum has joined #bitcoin-wizards 21:01:47 mappum has quit 21:02:14 mappum has joined #bitcoin-wizards 21:07:18 roidster has joined #bitcoin-wizards 21:07:23 roidster is now known as Guest1405 21:07:34 Guest1405 has quit 21:08:56 shesek has quit 21:12:41 jgarzik has quit 21:22:32 shesek has joined #bitcoin-wizards 21:34:34 EasyAt is now known as EasyAt|RollyChai 21:37:53 mappum has quit 21:40:05 Ursium has joined #bitcoin-wizards 21:41:05 Ursium_ has quit 21:41:11 mappum 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